Practical trainings, student assistants and theses
Student assistant for technology marketing wanted (Id 274)
Student Assistant
Your tasks:
• Support in event management
• Technology marketing support
• Communication and interaction with alumni
• Technical research e.g. in the field of alumni management, CRM systems
• Database creation and maintenance
• Other administrative activities
Department: Technology Transfer & Innovation
Contact: Dr. Wolf, Björn
Requirements
• a bachelor's degree in a communication, economics or humanities course
• Pronounced service orientation
• Expert handling of MS Office and social media
• Ideally experience with content management systems and databases
• Excellent verbal and written communication skills
• Independent and structured way of working
• Teamwork
• Fluent knowledge of English
It is up to you to write, research and conceptualize. You are creative and like to bring in new ideas. Reliability, independence and structured work characterize your personality. You can familiarize yourself quickly with new tasks and like to get involved in a motivated team. We look forward to meeting you!
Conditions
We offer you exciting and challenging tasks, a collegial and international working environment, active support in the implementation of your tasks, as well as room for decision and responsibility. Various topics for scientific work are available. The place of work is Dresden-Rossendorf. The duration of the SHK activity (min. 5 h / week) should be at least one year, the internship (full-time) should be at least 3 months.
Online application
Please apply online: english / german
Student assistant/internship in technology transfer and innovation wanted (Id 273)
Student practical training / Student Assistant
Your tasks:
- Participation in the potential screening of research results
- Internet and database research for market and competition and patent analyzes
- Creation of utilization or business planning for spin-offs
- Creation of cost calculations and financial planning
- Creation of technology exposes
- Creation of presentations
- Database maintenance, reporting, evaluation of data on transfer key figures
- After individual consultation, independent processing of various projects (e.g. conception and support of reporting system & benchmarking etc.)
Department: Technology Transfer & Innovation
Contact: Dr. Wolf, Björn
Requirements
You have successfully completed at least the first academic year of industrial engineering, economics or a further degree (esp. MINT) with a partial business qualification. Your grade point average is min. 2.0. You have significant practical experience in the relevant areas and have good knowledge of MS Office. You work independently, in a structured manner, can quickly familiarize yourself with new tasks and are happy to contribute to a motivated team. You have very good knowledge of English.
Conditions
We offer you exciting and challenging tasks, a collegial and international working environment, active support in the implementation of your tasks, as well as room for decision and responsibility. Various topics for scientific work are available. The place of work is Dresden-Rossendorf. Some of the tasks can be completed after coordination in home work. The duration of the SHK activity (min. 5 h / week) should be at least one year, the internship (full-time) should be at least 3 months.
Online application
Please apply online: english / german
Numerical simulation of transport phenomena in Liquid Metal Batteries (Id 272)
Bachelor theses / Master theses / Diploma theses / Student Assistant / Compulsory internship / Volunteer internship
Liquid metal batteries (LMBs) are an innovative electrical energy storage techology proposed as a possible candidate for the grid integration of renewable energy sources (see https://youtu.be/Sddb0Khx0yA ).
Consisting of a totally liquid interior (two liquid metals are separated by a molten salt electrolyte), LMBs allow extremely high current densities. The raw materials are earth abundant and thecells can potentially be very cheap [1].
The high temperatures and the aggressive environment limit the experimental study to few measurable quantities. Numerical studies are required to understand the relevant transport phenomena and their effect on the cell performance [2].
Using the free and open source CFD library OpenFOAM a number of solvers were programmed in our group to predict fluid flow and transport phenomena in LMBs (i.e. [2, 3]).
In frame of a project work or a master thesis the student has the possibility to investigate heat and mass transfer in liquid metal batteries through numerical simulations. The task will encompass the entire CFD workflow from the preprocessing step to the evaluation of the results.
The work will be carried out in the Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany. This research center is a member of the Helmholtz Association of German Research Centers. The Center's focus is on interdisciplinary research in the areas energy, health and matter.
Please provide a letter of motivation, a CV as well as a transcript of records and a copy of your latest certificate (e.g. bachelor).
References:
[1] Kim et al., 2013. Liquid Metal Batteries: Past, Present, and Future. Chemical Reviews 113, 2075–2099. doi:10.1021/cr300205k
[2] Personnettaz et al., 2019. Mass transport induced asymmetry in charge/discharge behavior of liquid metal batteries. Electrochemistry Communications 105, 106496. doi:10.1016/j.elecom.2019.106496i
[3] Weier et al. 2017. Liquid metal batteries-materials selection and fluid dynamics, IOP Conf. Series: Materials Science and Engineering 228, 012013. doi:10.1088/1757-899X/228/1/012013
Department: Magnetohydrodynamics
Contact: Personnettaz, Paolo
Requirements
• interest in numerical simulation of multi-physics phenomena (thermo-fluid-dynamics and electrochemistry),
• bachelor degree in engineering, physics or mathematics,
• basic knowledge of continuum mechanics (e.g. heat transfer, fluid dynamics),
• experience with numerical methods and their implementation,
• ideally experience in computational fluid dynamics.
Helpful:
• basic knowledge of electrochemistry,
• experience with numerical simulation,
• programming experience with Python and/or C++,
• familiarity with GNU/Linux environment.
We offer:
• exciting work environment on an attractive research campus,
• possibility to learn how to use one of leading CFD software (OpenFOAM) on HPC through the full CFD workflow.
Conditions
Duration: 6 months
Links:
Online application
Please apply online: english / german
Evaluation of neutron activation analyses of sphalerite and galena (Id 271)
Student Assistant / Research Assistant
Neutron activation analyses have been performed on several samples as part of the development of in-house reference materials for spatially resolved trace element analysis of sphalerite (ZnS) and galena (PbS).
The resulting extensive raw data must first be checked for internal consistency, screened and read into various analysis software.
In the course of the spectrum evaluation, the respective gamma peaks must be assigned to elements. Due to various overlaps in these spectra, this assignment must be based on geochemical information from previous analyses of the samples. This qualitative evaluation is the basis for quantification.
The duration of employment is 2 months
Department: Analytics
Contact: Dr. Renno, Axel
Requirements
For this task we are looking for an analytically interested student (m/f/d) of geosciences, chemistry or material sciences who is able to work reliably and independently according to instructions.
Online application
Please apply online: english / german
Design, construction and commissioning of a test rig for the experimental investigation of valve trays for distillation columns (Id 269)
Student practical training / Bachelor theses / Master theses / Diploma theses / Compulsory internship
Distillation columns are used for thermal separation of multicomponent mixtures in the chemical industry. Owing to increased energy supply from renewable sources a more flexible operation of such apparatuses is already demanded. However, enlarged over- and underload modes are challenging with respect to design, since a high separation efficiency needs to be attained anyway. Especially in case of valve trays there are presently no reliable methods for estimating the influence of the tray design on the complex two-phase flow of liquid and vapor.
Within the frame of a current research project that aims at closing this gap, we offer a student internship position for establishing a lab-scale test rig, which allows for investigating the two-phase flow at single valves in detail. The work includes typical engineering tasks, such as conception, design, assembly and commissioning.
Department: Experimental Thermal Fluid Dynamics
Contact: Dr. Wiedemann, Philipp
Requirements
• studies in process/energy/mechanical engineering
• interest in practical work
• creativity
• good written and oral communication skills in English and German
Conditions
• start: from Feb. 2020
• working in a multi-disciplinary team
• remuneration according to HZDR internal regulations
Online application
Please apply online: english / german
Experimentelle Untersuchung des Stofftransportes in Blasenströmungen (Id 268)
Master theses / Diploma theses / Compulsory internship
Blasensäulen sind ein beliebter Reaktortyp für die Durchführung von gas-flüssig Reaktionen in der chemischen Industrie. Sie zeichnen sich durch hohe Stofftransportraten und eine gute Durchmischung aus. Die Auslegung dieser Apparate basiert jedoch meist auf groben Abschätzungen, da die in Blasensäulen ablaufenden Prozesse sehr komplex sind. Dieses Projekt befasst sich mit der Untersuchung des Stofftransportes an Einzelblasen und Blasengruppen. Die zu untersuchende Reaktion ist eine Modellreaktion und zeichnet sich durch die Bildung eines farbigen Reaktionsproduktes aus und kann spektroskopisch erfasst werden.
Die Aufgabenstellung umfasst:
- Literaturrecherche
- Durchführung der Stofftransportmessungen an einem bestehenden Versuchsaufbau im Chemielabor
- Auswertung der gewonnenen Messdaten vorzugsweise mit Matlab
- Dokumentation und Vergleich mit Literaturdaten
Department: Experimental Thermal Fluid Dynamics
Contact: Kipping, Ragna
Requirements
- Studium des Chemie-Ingenieurwesen, Verfahrenstechnik, o.ä.
- Freude am experimentellen Arbeiten
- Laborerfahrung wünschenswert
- Erfahrungen im Umgang mit Matlab von Vorteil
Conditions
Dauer: 4-6 Monate
Links:
Online application
Please apply online: english / german
Auswertung experimenteller Untersuchungen an einer Blasensäule zur Erweiterung numerischer Zweiphasensimulationen (Id 267)
School practical training / Student practical training / Bachelor theses / Student Assistant / Compulsory internship
Numerische Strömungssimulationen (CFD) bieten in zunehmendem Maße eine Alternative zur Optimierung und Verbesserung sowohl bestehender als auch neuartiger industrieller Prozesse oder Produkte, wofür ansonsten kostspielige und zeitaufwendige Versuchs- und Pilotanlagen verwendet werden. Während die Simulation einphasiger Strömungen stabile und zuverlässige Vorhersagen erlaubt, sind aufgrund der Komplexität und der Vielzahl an zusätzlichen Wechselwirkungen numerischen Untersuchungen für mehrphasige Strömungen bisher nur für ausgewählte Fälle validiert und sinnvoll.
Um die Anwendbarkeit numerischer Mehrphasensimulationen zu erweitern, werden am Institut für Fluiddynamik des Helmholtz-Zentrums Dresden-Rossendorf videometrische Untersuchungen in Blasensäulen durchgeführt, um Phasenwechselwirkungsphänomene quantitativ zu erfassen und besser zu verstehen. Für die Auswertung solcher Experimente werden Studentinnen und Studenten der Studienrichtungen Verfahrenstechnik, Maschinenbau o.ä. gesucht. Die Tätigkeiten können als studentische Hilfskraft, Belegarbeit/Studienarbeit oder Bachelorarbeit mit Vergütung durchgeführt werden. Die Arbeiten werden in einer Gruppe mit intensiver Betreuung am HZDR angefertigt.
Department: Computational Fluid Dynamics
Contact: Heßenkemper, Hendrik
Requirements
• Begonnenes Studium der Verfahrenstechnik, Maschinenbau o.ä.
• Interesse am experimentellen Arbeiten
• Gute englisch Sprachkenntnisse
• Programmiererfahrungen (z.B. Matlab) sind von Vorteil
Conditions
Beginn: ab November 2019
Bearbeitungszeit: 1-6 Monate
Vergütung entsprechend HZDR-internem Tarif
Online application
Please apply online: english / german
Experimental investigation of particle remobilisation from wall surfaces with well-defined asperities (Id 265)
Master theses / Diploma theses / Compulsory internship / Volunteer internship
As member of the Helmholtz Association of German Research Centers, the Helmholtz-Zentrum Dresden – Rossendorf (HZDR) employs about 1,200 people. The Center's focus is on interdisciplinary research in the areas energy, health, and matter.
The Institute of Fluid Dynamics of HZDR has a strong focus on the resuspension of micron particles in turbulent flows. It invites applications for a six-month internship to investigate experimentally the particle detachment from wall surfaces in turbulent flows. The position is available immediately. Kindly submit your completed application (including cover letter, CV, diplomas/transcripts, etc.) via our Online-application-system.
Advances in the generation of functional surfaces (i.e. surfaces with well-defined asperities) make it possible to design self-cleaning surfaces. The automotive industry may for instance benefit from such advances. The aim of the project is to study experimentally the detachment of “dust” particles (glass beads with diameters ranging from 10 to 50 µm) on smooth substrates with precisely defined asperities (size of the asperities about 1 µm). The collision of the rolling dust particles with the asperities is expected to boost the resuspension, thereby leading to an enhanced self-cleaning effect of such surfaces.
The tasks of the project will involve:
- Perform a literature survey on the resuspension of micron-particles in turbulent flows
- Design a small wind tunnel to study the particle detachment from wall surfaces with well-defined asperities
- Use of high-speed cameras to visualize the particle detachment in turbulent flows
Department: Experimental Thermal Fluid Dynamics
Contact: Dr. Lecrivain, Gregory
Requirements
Interest in fluid dynamics
Studies in natural sciences or engineering
Willingness to conduct experimental work
Conditions
Remuneration is normally offered to our trainees
German lessons are also available free of charge
Online application
Please apply online: english / german
Energetische Bewertung der CO2-Abtrennung von Syngasturbinen mittels intensiverter Trennapparate (Id 263)
Master theses / Diploma theses
Um die von der europäischen Union anvisierten Klimaziele zu erreichen muss eine deutliche Reduktion der CO2-Emissionen erfolgen. Hierbei ist eine Abtrennung von CO2 bei nicht substituierbaren Quellen wie der Zement und Stahlindustrie notwendig. Weiterhin werden dezentrale Blockheizkraftwerke einen wesentlichen Beitrag zur Lastflexibilität leisten und somit die Versorgungsstabilität (Backbone) für den Fall gewährleisten, dass erneuerbare Energien temporär nicht verfügbar sind. Da mittelfristig ein Betrieb dieser Blockheizkraftwerke mit Erdgas und punktuelle CO2-Quellen nicht zu vermeiden sind, ist ein geeignetes Konzept zur effizienten CO2-Abtrennung erforderlich. Ein Ansatzpunkt ist die Kopplung von Gasturbine und HiGEE-Trennapparaten über einen gemeinsamen Rotor. HiGEE-Apparate bestehen aus rotierenden Packungen, in denen Waschmittel und Rauchgas unter Ausnutzung der Zentrifugalkraft kontaktiert werden.
Im Rahmen der Arbeit ist eine Recherche zu CO2-Punktquellen in Deutschland und Europa durchzuführen und die CO2-Emissionen sind quantitativ und qualitativ einzuordnen. Ein Konzept zur CO2-Abscheidung ist energetisch zu bewerten. Exemplarisch sollen Betriebsdaten (Leistung, Wirkungsgrad, Abgaszusammensetzung und -temperatur) eines Blockheizkraftwerkes angenommen werden. Daten zur CO2-Abtrennung mittels HiGEE-Apparate sind aus der Literatur zu extrahieren.
Folgende Teilarbeiten sind durchzuführen:
- Recherche zu CO2-Punktquellen in Deutschland und Europa
- Recherche/Analyse der Überschussstromproduktion in Deutschland anhand einer Beispielregion
- Ausstellen der Wärme- und Stoffbilanzen und möglicher energetischer Verschaltungen (Wärmerückgewinnung)
- Abschätzungen erforderlicher HiGEE-Apparategrößen
- Bestimmung des Turbinenwirkungsgrades unter Berücksichtigung des Desportionsprozesses
Department: Experimental Thermal Fluid Dynamics
Contact: Fogel, Stefan, Unger, Sebastian
Requirements
Student (m/w/d) im Bereich Energietechnik, Chemie- oder Elektroingenieurwesen, Verfahrenstechnik oder ähnlicher fachlicher Ausrichtung.
Kenntnisse in Aspen Plus, ChemCAD oder ähnlichen Programmen sowie gute Sprachkenntnisse in Englisch.
Conditions
Mindestdauer: 6 Monate; ab sofort durchführbar.
Online application
Please apply online: english / german
Development of a GUI for a Python simulation tool (Id 261)
Student practical training / Bachelor theses / Master theses / Diploma theses / Compulsory internship / Volunteer internship
For a software project (simulation tool in Python 3), a graphical user interface (based on Tkinter or Qt) shall to be developed. The goal is to configure, start and evaluate simulations via the GUI. Consequently, all interfaces must be developed or modified, the operator panel must be designed and all needed testing and error-handling routines must be implemented.
Note: This is an offer suitable for a bachelor, master or diploma thesis or studentic internships.
Do not apply if you already finished your studies!
Department: Magnetohydrodynamics
Contact: Dr. Nimtz, Michael
Requirements
Study informatics or similar.
Good knowledge of a programming language, preferably python as well as experience with the implementation of GUIs.
Basic knowledge of engineering principles is beneficial.
Good command of English.
Conditions
Start: from November 2019
Duration: 4-6 months
Paid according to HZDR-internal tariff
Links:
Online application
Please apply online: english / german
Gas phase simulation of pressure wave in a gas-injection pipe (Id 259)
Student practical training / Bachelor theses / Master theses / Diploma theses
In two-phase flows, the interface at which the phases are in contact to one another is of high importance. One way to manipulate the dynamic of this interface is to modulate the pressure field within the gas phase. Accordingly, it is intended to study the influence of pressure modulation in a gas pipe with multiple openings. In this content, the system characteristics should be defined and the effect of individual parameters, which influence the temporal change of the pressure field at the openings are going to be studied. These parameters include frequency and amplitude of excitations, pressure fluctuation, geometry of the pipe and the openings, gas flow rate, etc. To peruse this idea, it is intended to simulate the gas pressure field in the pipe and under the opening using COMSOL Multiphysics.
Task Spectrum:
• Establishment of a profound scientific knowledge in the field of acoustics and wave propagation
• Literature review on interacting two phase flows and pressure waves
• Establishing the simulation strategy
• Model the geometry, flow domain, establishing the initial and boundary condition
• Performing the simulation with various geometries and post processing the result
• Generate scientific documentation
Department: Experimental Thermal Fluid Dynamics
Contact: Mohseni, Ehsan, Dr. Reinecke, Sebastian
Requirements
• Studies in mechanical, chemical, process engineering, and similar engineering courses
• Experience in simulation with COMSOL Multiphysics
• Optionally but not necessarily experience with acoustic module of COMSOL Multiphysics
• Independence, self-responsible working methods
Conditions
Duration: 6 Months
Online application
Please apply online: english / german
Modelling of bubble formation on submillimeter submerged orifice (Id 258)
Student practical training / Bachelor theses / Master theses / Diploma theses
Bubbles are an inevitable part of almost all chemical and process engineering processes as long as heat and mass transfer or particle separation are concerned. Formation of bubbles from a submerged orifice is a typical fluid dynamic phenomenon, which incorporates the influence of different characteristics of both gas and liquid phases. Although posing as a simple problem in the first sight, the formation process varies dramatically by changing influential parameters such as diameter and geometry of orifice, volume of gas reservoir under the orifice, surface tension, density and viscosity of both continuous and dispersed phases, etc. Among these parameters, the effect of the volume of the gas reservoir under the orifice is highly influential. Within an ongoing investigation, we are experimentally studying the effect of this parameter on the dynamics of bubbles generated at orifices smaller than 1 mm. A sub task of this investigation associates the findings of the experimental studies into a mechanistic model, which is designed to estimate the final bubble size.
Task Spectrum:
• Establishment of a profound scientific knowledge into the phenomena of bubble formation and detachment
• Concept development and establishing solution strategy for the bubble volume
• Implementing the solutions into MATLAB
• Compare and adopting the model based on the experimental results
• Generate scientific documentation
Department: Experimental Thermal Fluid Dynamics
Contact: Mohseni, Ehsan, Dr. Reinecke, Sebastian
Requirements
• Studies in mechanical, chemical, process engineering, and similar engineering courses
• Experience in data analysis and programming with MATLAB
• Independence, self-responsible working methods
Conditions
Duration: 6 Months
Online application
Please apply online: english / german
Design and operation of liquid metal batteries as large-scale storage option (Id 256)
Student practical training / Bachelor theses / Master theses / Diploma theses / Compulsory internship / Volunteer internship
In contrast to conventional batteries, Liquid Metal Batteries feature all liquid anodes (alkaline or alkaline earth metal), cathodes (transition metal or metal) and electrolytes (molten salts) at a temperature between 400 °C and 600 °C. For the operation of liquid metal batteries as large-scale storage option (frequency control and other applications), the design of the storage system and operation strategies (including a battery management system) need to be implemented and tested using exemplary load curves.
Starting point is an existing model of a battery system in Python.
Note: This is an offer suitable for a bachelor, master or diploma thesis or studentic internships.
Do not apply if you already finished your studies!
Department: Magnetohydrodynamics
Contact: Dr. Nimtz, Michael
Requirements
Study of mechanical engineering, physics, mathematics or similar
Basic knowledge of engineering principles.
Good knowledge of a programming language, preferably python.
Conditions
Start: October 2019
Duration: 4-6 months
Paid according to HZDR-internal tariff
Links:
Online application
Please apply online: english / german
6-month internship on the experimental investigation of granular mixing (Id 255)
Student practical training / Bachelor theses / Master theses / Diploma theses / Compulsory internship / Volunteer internship
Background:
Granular mixing is an important industrial process. In the pharmaceutical industry for instance, the powder that is pressed to make tablets is produced by mixing precise quantities of active substances and excipients in granular state. The mixing needs to be done in such a way that the final powder has a homogeneous composition. Tablets may also need to be coated in a pan coater. Granular mixing also plays a crucial role there, as it greatly affects the thickness of the coating. Granular mixing is also often coupled with heat exchanging and solid-gas or solid-solid reactions, as is the case of rotary kilns in the cement, ceramics and metallurgical industries. The quality of the mixing is then a crucial factor to the efficiency of the overall process.
Objectives:
The objective of the work is to experimentally study the mixing process of two different types of granular particles inside a rotating drum under various operating conditions. More specifically, the mixing process is to be captured with a high-speed camera. The videos are then to be post-processed in order to extract characteristics of the particle velocity fields and mixing efficiency. The mixing facility is already available.
Tasks:
• Literature survey
• Mixing experiments under various operating conditions
• Post-processing of the results with MATLAB
Department: Experimental Thermal Fluid Dynamics
Contact: Papapetrou, Theodoros Nestor
Requirements
• Student of natural sciences or engineering
• Willingness to conduct experimental work
Conditions
Duration: 6 months
Online application
Please apply online: english / german
Student assistant at the DeltaX School Lab (Id 252)
Student Assistant / Research Assistant
The DeltaX student laboratory makes research at the Helmholtz-Zentrum Dresden-Rossendorf an experience for students. We are looking for tutors who enjoy teaching science, research and technology and who would like to support students conducting their experiments. Apply as a student assistant in the DeltaX school laboratory and become part of a young and open-minded team.
Department: Communication & Media Relations
Contact: Dr. Streller, Matthias, Gneist, Nadja
Requirements
- Study of a scientific subject
- Remaining study duration of at least 2 semesters
- Pleasure in teaching science and research- Good to very good grades
- Very good knowledge of German (C level)
Conditions
- 5 - 10 h / week on whole weekdays
- Start of hiring according to agreement
Links:
Online application
Please apply online: english / german
Modbus/TCP-Kommunikation im TIA-Portal (Id 249)
Student practical training / Volunteer internship
Erstellung von SPS-Anwendersoftware.
Für die Kommunikation zwischen einer SPS und einem externen Messgerät sollen Softwarebausteine programmiert werden, die einen Verbindungsaufbau zum Gerät über eine Modbus/TCP-Verbindung realisieren und Daten abfragen und senden können.
Dafür ist die Implementierung des Übertragungsprotokolls sowie individueller Kommandos zu realisieren
(Programmierumgebung: SIEMENS TIA-Portal).
Institute: Department of Research Technology
Contact: Wagner, Nicole
Requirements
- Kenntnisse in SCL (Structured Control Language) oder C
- Grundkenntnisse Ethernet-Kommunikation
Conditions
- Bearbeitungszeit: ca. 4 Wochen
- Beginn: ab sofort
Online application
Please apply online: english / german
Materialien für Solarkraftwerke (Id 241)
Bachelor theses / Master theses / Diploma theses
Turmkraftwerke stellen die neueste Generation von Anlagen zur solarthermischen Elektroenergieerzeugung dar. Extrem konzentriertes Sonnenlicht wird dabei auf einen zentralen Absorber gerichtet, der die Wärme auf eine Wärmeträgerflüssigkeit überträgt (s. Foto). Zur Erhöhung des Wirkungsgrades von Turmkraftwerken soll die Arbeitstemperatur von derzeit maximal 550°C deutlich erhöht werden. Dafür sollen werkstoffwissenschaftliche Lösungen weiter verfolgt werden, die im Rahmen eines EU-RISE-Projektes entwickelt wurden.
Als Themen für Graduierungsarbeit werden
i) die Optimierung von optischen und elektrischen Schichteigenschaften
ii) die Verbesserung der Schichthaftung auf Hochleistungslegierungen und
iii) die Komplettierung eines neuen Schichtsystems angeboten.
Zur Charakterisierung der untersuchten Materialien stehen modernste in situ und ex situ Analysemethoden zur Verfügung.
Department: Nanocomposite Materials
Contact: Dr. Krause, Matthias
Requirements
1. Studium der Werkstoffwissenschaften, Physik oder Chemie mit überdurchschnittlichen Leistungen (Notendurchschnitt ≤ 2.0)
2. Interesse und Freude an experimenteller wissenschaftlicher Arbeit
3. Grundkenntnisse in Programmierung und sicherer Umgang mit Büro- und wissenschaftlicher Software
4. Fachkundige Englischsprachkenntnisse
Conditions
Beginn: 1.10.2019, internationale Forschungsumgebung, ortsübliche Aufwandsentschädigung
Online application
Please apply online: english / german
Halogen element (F, Cl, Br, and I) content and distribution in natural and synthetic sphalerite – a SIMS study (Id 236)
Master theses / Diploma theses
Due to crystallochemical considerations, sphalerite (ZnS) as a typical sulfide mineral should not contain high contents of the halogen elements fluorine, chlorine, bromine and iodine. Current research findings proved at least for chlorine and bromine elevated contents up to 1000 µg*g-1 (Cl) and x0 µg*g-1 (Br). If it appears that the halogen elements are built into the lattice and not in fluid- and mineral inclusions we will be able to draw conclusions about the chemical as well as physicochemical parameters of the ore-forming fluids.
Using the Super-SIMS setup we could prove that all halogens are detactable in natural sphalerites.
The aim of the thesis is to analyse and compare these natural sphalerites by normal SIMS. Additionally halogen-rich synthetic sphalerites will be analysed.
Department: Analytics
Contact: Dr. Renno, Axel
Requirements
• You study geosciences, material's sciences or chemistry
• You are interested in mineralogical or analytical problems
• You are interested in modern analytical techniques
• You show initiative and good teamwork skills
Conditions
Start immediately
project period in accordance withe respective study regulations (est. 6 month)
Links:
Online application
Please apply online: english / german
Evaluation of the HDF5 file format for measurement data archiving at Dresdyn (Id 235)
Student practical training / Bachelor theses / Compulsory internship / Volunteer internship
At the Institute of Fluid Dynamics, Dresdyn will be a new large-scale experiment built up. The measurement data from several PLCs and Microcontrollers are captured and must be archived. Due to high incoming data rates a perfomant software is necessary for writing the archive data.
The task includes the following topics:
- Investigation of the HDF5 file format (structure, performance, parallel processing)
- Specification and optimization of a data storage structure for continuous data streams
- Creation of libraries for use in the logging system as well as in non-time critical evaluation
Institute: Department of Research Technology
Contact: Wagner, Nicole, Meyer, Markus
Requirements
- Advanced knowledge in C ++
- Basic knowledge of Linux
Conditions
- Duration: 3-5 months
- Start: now
Online application
Please apply online: english / german
Untersuchung konvektionsgetriebener Beeinflussung des Erstarrungsgefüges von Leichtmetalllegierungen (Id 234)
Bachelor theses / Master theses / Diploma theses / Student Assistant
Die Gefügeeigenschaftsbeziehungen fordern für Konstruktionswerkstoffe zumeist ein möglichst feines, homogenes und isotrop belastbares Erstarrungsgefüge. Für Aluminiumgusslegierungen wird dies durch Zusätze von Veredelungs- und Kornfeinungsmitteln erreicht. Diese Zusätze verursachen Kosten, sind problematisch bezüglich Recycling sowie dem Umweltschutz und haben weitestgehend keinen positiven Einfluss auf intermetallische Verbindungen. Es besteht daher der Wunsch, ohne Zusätze ein feines und homogenes Erstarrungsgefüge einstellen zu können. Ein probates Mittel ist der Einsatz von elektromagnetischen Feldern. Diese sind für Leichtmetallschmelzen zur kontaktlosen Erzeugung einer Strömung mit nachweislich positiven Effekten geeignet. Dabei sind die Auswirkungen auf die Morphologie von intermetallischen Verbindungen kaum erforscht.
Ziel ist es, mit Hilfe von elektromagnetisch erzeugter Konvektion die Kristallisationsmorphologie von intermetallischen Phasen zu verändern und gleichzeitig Kornfeinungsmittel ganz oder teilweise zu substituieren. Für die wissenschaftliche Bewertung der Aluminium-Gussbolzen ist eine qualitative und quantitative Gefügecharakterisierung notwendig. Zusätzlich besteht die Möglichkeit, die Metallurgie von Aluminiumlegierungen kennenzulernen und den Erstarrungsverlauf an Hand von Temperaturverläufen zu studieren. Grundlage für die Arbeit ist es, sich in die Thematik des elektromagnetischen Rührens von Metallen und deren Auswirkung auf das Gefüge einzuarbeiten. Des Weiteren wird eine selbständige Arbeitsweise bei der Gefügeanalyse erwartet. Es sollte Interesse an Erstarrungsvorgängen und der damit einhergehenden Gefügeausbildung bestehen.
Department: Magnetohydrodynamics
Contact: Dr. Räbiger, Dirk, Willers, Bernd
Requirements
Die Ausschreibung richtet sich an Studentinnen und Studenten der Fachrichtung Werkstoffwissenschaft, Giessereiwesen, Urformtechnik, ...
Conditions
Beginn: ab sofort
Bearbeitungszeit: Variabel nach Interesse und Themenauswahl
Bewerbung mit Lebenslauf und Zeugnissen
Vergütung nach hausinternen Vergütungsregeln
Online application
Please apply online: english / german
Entwicklung einer Handsteuerung für Kondensatorladegeräte (Id 216)
Student practical training
Die Handsteuerung eines Kondensatorladegerätes soll modernisiert werden. Das Kondensatorladegerät wird zur Untersuchung von Materialeigenschaften verwendet und erzeugt hohe Spannungen für das Laden von Kondensatoren.
Die Entwicklung der Handsteuerung beinhaltet unter anderem folgende Themen:
- Hardwareentwicklung (Schaltungsentwurf)
- Spezifikation/Recherche von Gehäuse-Optionen
- Softwareentwicklung (Mikrocontroller, Ansteuerung Display)
- Umfang ca. 4-6 Wochen als Praktikum
Institute: Department of Research Technology
Contact: Winkler, Nick, Dr. Herbrand, Frank
Requirements
- Grundkenntnisse Elektrotechnik
- Grundkenntnisse C
Online application
Please apply online: english / german
Smart actuation system for flow following µAUV particles for industrial process environments (Id 175)
Master theses / Diploma theses / Compulsory internship
Smart flow following sensor particles are used for acquisition of spatially distributed process parameters in industrial processes, such as biogas digesters, waste water treatment basins or bioreactors. The aim of the work is the development of an actuator concept for sensor µAUV-particles for the automatic adjustment of buoyancy (buoyancy) and for buoyancy maneuvers under the condition of small size, minimum energy consumption and high reliability. For this, alternative physical and chemical mechanisms should be considered based on the existing electromechanical solution. There are suitable variants to implement and test. Furthermore, the development of sensor intelligence for the actuators in the sensor particles is an essential part of the task. The developed concepts have to be validated experimentally.
We cordially invite you to an on-site conversation to introduce the topic and to agree on further details. Do not hesitate to contact us, because the way is worth it for you.
What can you expect:
In our department, we offer you an attractive work environment to expand your personal and professional skills. The insight into the diverse R&D projects of the department in the areas of sensor and measuring technology as well as energy and process engineering (among others) and the excellent technical equipment of the laboratories offer optimal conditions for this. The possibility of close contact with competent experienced colleagues plays a central role. As part of student work, we have pursued the approach of structured supervision and associated constructive feedback. This includes regular meetings with your supervisor and intermediate presentations in the form of informal "workshop reports" in the extended audience of interested individuals of the department in order to optimally support you in the successful completion of your project. Furthermore, we are open to support outstanding candidates in their continuing academic qualification, such as in doctoral scholarships or in current or upcoming R&D projects.
Subject-related task spectrum:
• Establishment of the scientific and technical principles of mechanical, physical and chemical principles of action for embedded, actuating components
• Concept development for actuators for taring of sensor particles
• Development of sensor intelligence for situation-dependent, automatic buoyancy, for buoyancy maneuvers and for recovery
• Selection, purchase/ composition and comparison of solution variants
• Minimization of size and energy consumption
• Increased reliability when used in particle-loaded biological substrates
• Development of firmware taking into account existing function routines based on an embedded system with 32-bit data structure (e.g. STM32)
• Conception and realization of suitable test scenarios
• Characterization and comparison of implemented variants with regard to accuracy of taring and reliability in long-term use
Department: Experimental Thermal Fluid Dynamics
Contact: Dr. Reinecke, Sebastian
Requirements
• Studies in electrical engineering, mechatronics, mechanical engineering and similar engineering courses
• Experience in design and (micro) actuator systems
• Experience in programming microcontrollers for embedded systems (e.g. STM32)
• Experience in control electronics for microdrives and board design for embedded systems
• Fundamentals of (micro) actuator systems, movement of rigid bodies, measurement uncertainties, digital signal processing
• Data analysis optionally in Matlab, Octave or C / C ++
• Independent, self-responsible working method
Links:
Online application
Please apply online: english / german
Entwicklung eines digitalen Lock-in-Verstärkers auf FPGA-Basis (Id 166)
Student practical training
Das Prinzip des Lock-In-Verstärkers erlaubt es empfindliche Messgeräte zu realisieren. Im vorliegenden Projekt soll die Umsetzung auf Basis digitaler Signalverarbeitung im FPGA erfolgen. Dabei sollen u. a. Erfahrungen bezüglich erreichbarer Performance und des nötigen Implementierungsaufwandes gewonnen werden.
Institute: Department of Research Technology
Contact: Lange, Bert
Requirements
- Studium der Elektrotechnik oder Informatik
- Interesse an digitaler Signalverarbeitung
- Grundkenntnisse im Einsatz von FPGAs
- Grundkenntnisse VHDL erforderlich
Online application
Please apply online: english / german
Bestimmung von Geschwindigkeitsfeldern aus tomographischen Bilddaten mittels Kreuzkorrelation (Id 164)
Bachelor theses / Master theses / Diploma theses
Am Institut für Fluiddynamik am Helmholtz-Zentrum Dresden-Rossendorf sind zahlreiche Messverfahren für die Untersuchung von Mehrphasenströmungen entwickelt worden. Eines davon ist die ultraschnelle Elektronenstrahl-Röntgen-Computertomographie, welche mit Aufnahmeraten von bis zu 8000 Bildern pro Sekunde eine dedizierte Aufklärung von Strömungsstrukturen erlaubt. Aufgrund der quasi simultanen Aufnahme von Bilddaten aus zwei Messebenen ergibt sich zudem die Möglichkeit, axiale Geschwindigkeiten zu bestimmen, wofür üblicherweise Kreuzkorrelationsverfahren verwendet werden. Im Rahmen dieser Arbeit sollen die Möglichkeiten dieser Methodik in Hinblick auf die Bestimmung von Geschwindigkeitsfeldern in verschiedenen Strömungsszenarienn analysiert werden.
Folgende Teilaufgaben sind zu lösen:
• Studie zu verschiedenen Varianten der Kreuzkorrelation
• Simulation verschiedener Szenarien und Bewertung der Genauigkeit
• Übertragung der Ergebnisse auf reale Messungen
Department: Experimental Thermal Fluid Dynamics
Contact: Dr. Bieberle, Martina
Requirements
• Studium der Informatik, Mathematik oder einer Ingenieurwissenschaft
• Interesse an Messverfahren und Datenanalyse
• Selbständiges Arbeiten
Conditions
Bearbeitungszeit 4 bis 6 Monate
Links:
Online application
Please apply online: english / german
Untersuchung des Einflusses von Regularisierungsmethoden auf Bildrekonstruktionsalgorithmen (Id 57)
Student practical training / Bachelor theses / Master theses / Diploma theses
Bei der tomographische Bildrekonstruktion muss ein diskretes inverses Problem gelöst werden, wofür algebraische Methoden wie zum Beispiel ART und CG-Verfahren verwendet werden können. Dabei spielt die Regularisierung, die den Einfluss von Diskretisierungsfehler und Messdatenrauschen auf die Lösung beschränkt, eine entscheidende Rolle. Deren Einfluss auf die Bildrekonstruktion von Röntgen- und Gamma-CT-Messdaten soll untersucht werden. Dazu sind folgende Teilaufgaben zu lösen:
• Implementierung verschiedener Regularisierungsmethoden
• Anwendung der Programme auf Messdaten
• Parameterstudien um die Regularisierungsmethoden für die Messdatensätze zu optimieren.
Department: Experimental Thermal Fluid Dynamics
Contact: Wagner, Michael, Dr. Bieberle, Martina
Requirements
• Programmierkenntnisse in MATLAB
• Grundkenntnisse zur numerischen Behandlung linearer Gleichungssysteme
Links:
