Practical trainings, student assistants and theses
Contributions to motion tracking of autonomous flow-following sensor particles in industrial process environments (Id 279)
Student practical training / Bachelor theses / Master theses / Diploma theses / Compulsory internship
Data acquisition in large industrial vessels such as biogas fermenters or wastewater treatment plants is limited to local measurement points due to limited access to the vessel and the non-transparency of the fluid. To optimize these kinds of plants, the three-dimensional flow field and the spatial distribution of properties such as temperature and electrical conductivity inside the vessel need to be known. This can be achieved by the autonomous flow-following sensor particles developed by HZDR. Equipped with a pressure sensor, an accelerometer, two gyroscopes and a magnetometer, the sensor particle can track the movement inside the vessels and to infer the flow field from that. The analysis of the data is done after a successful recovery from the vessel. Therefore, algorithms of any complexity can be used to track the motion of the sensor particle.
For the extension and especially for the improvement of the motion tracking we offer the following tasks, from which we can agree on a topic for a thesis or an internship:
• Development of motion tracking algorithms
• Characterization and error correction of the sensors
• Intelligent sampling for the sensors
• Experimental investigation of the maximal acceleration on a stirrer
• Development of firmware to cover several data acquisition scenarios
• Development of an end-user program for the configuration and data analysis of the gathered data
Department: Experimental Thermal Fluid Dynamics
Contact: Buntkiel, Lukas
Requirements
Studies in the area of electrical, mechatronic, mechanical engineering or similar
• Basics of measurement uncertainty, digital signal processing
• Data analysis in Python
• Independent and structured way of working
Conditions
Start possible at any time
Duration according to the respective study regulations
Links:
Online application
Please apply online: english / german
Generation, characterization and site-specific modification of recombinant antibody fragments for their application for radiopharmaceutical cancer research (Id 278)
Student practical training / Bachelor theses / Master theses / Diploma theses / Compulsory internship / Volunteer internship
Tasks:
- Cloning of respective coding sequences
- Heterologous expression and chromatographic purification of proteins
- Site-specific modification of proteins
- Radiolabeling of modified proteins
- In vitro binding studies using human cancer cell lines
Department: Radionuclide Theragnostics
Contact: Dr. Zarschler, Kristof
Requirements
- Studies in the area of biology, biotechnology or biochemistry
- Comprehensive knowledge regarding molecular biology and cell biology
- Strong interest in practical work
- Laboratory experience would be an additional advantage
- Independent and a well structured work style
- Very good communication skills in German and English (verbal and written)
Conditions
- Start possible at any time
- Duration according to the respective study regulations
- Remuneration according to HZDR internal regulations
Online application
Please apply online: english / german
Development and validation of a measurement and calibration program for a LIBS Handheld Analyzer device for the qualitative and quantitative analysis of scrap samples (Id 275)
Bachelor theses
Laser-induced breakdown spectroscopy (LIBS) is a very effective tool for the inspection of scrap samples, allowing rapid in-situ analysis of the composition both in the laboratory and directly in the recycling process. LIBS can detect low atomic number elements (i.e. light elements), some of which, such as carbon, are critical for the accurate characterization of individual scrap. However, it is also possible to detect harmful elements such as fluorine or bromine and thus remove critical samples from the recycling process.
The LIBS technology is available as a handheld instrument and thus offers the possibility to perform cost-effective analyses in real time on site.
The use of a 'LIBS Handheld Analyzer' always requires the application of a device-specific measurement and calibration program.
The aim of the bachelor thesis is the development and validation of such a program for the qualitative and quantitative analysis of simple alloys, which can be used as a blueprint for the development of further analysis programs for more complex composite scrap.
Department: Analytics
Contact: Dr. Renno, Axel, Dr. Möckel, Robert, Ebert, Doreen
Requirements
The thesis is suitable for students (m/f/d) of chemistry and materials science who are interested in analysis and who have a high degree of independence and are committed to an exact working method
Conditions
Start possible at any time
Duration according to the respective study regulations
Online application
Please apply online: english / german
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
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: immediately
• working in a multi-disciplinary team
• remuneration according to HZDR internal regulations
Online application
Please apply online: english / german
Nonlinear characterization of horizontal gas-liquid flows (Id 266)
Student practical training / Bachelor theses / Master theses / Diploma theses / Compulsory internship / Research Assistant
Horizontal gas-liquid flows occur in a variety of processes in energy and process engineering. According to the type of fluids, operating conditions and geometrical aspects different flow patterns are observed. These can be identified successfully by means of online monitoring systems when using appropriate measurement techniques and data processing algorithms.
Within the frame of an internship further investigations will focus on the predictability of the future development of the flow patterns on the basis of currently measured data. For that purpose, methods for characterizing nonlinear systems will be applied to available data that was recorded with the aid of an imaging technique.
Department: Experimental Thermal Fluid Dynamics
Contact: Dr. Wiedemann, Philipp
Requirements
- studies in mathematics/physics/engineering
- interest in applying sophisticated mathematical methods to engineering problems
- experiences in signal processing and nonlinear systems as well as using Matlab are beneficial
- good written and oral communication skills in English and German
Conditions
- start: immediately
- working in a multi-disciplinary team
- remuneration according to HZDR internal regulations
Links:
Online application
Please apply online: english / german
Validation of the AIAD and droplet entrainment model in ANSYS FLUENT (Id 262)
Student practical training / Bachelor theses / Master theses / Diploma theses / Student Assistant / Volunteer internship
CFD simulations of stratified flows are often conducted on the basis of the homogeneous model-based approach in which only one set of balance equations is considered. The different phases are taken into account by different material properties. Since only a velocity field is calculated leads to problems if the phases are not clearly separated, for example, if there is bubble entrainment in a wave or slug flow regime. The separation of the phases can then not be described properly.
To overcome this problem HZDR uses the Euler-Euler two-fluid approach for industrial macro-scale multiphase flow modeling. On both sides of the free surface, shear layers are expected which require a specific attention since complex phenomena with turbulent transfers coupled to possible interfacial waves take place. It was found necessary to be able to track the interface position in order to treat this zone in a similar way as a wall boundary layer using wall functions. When trying to use a two-fluid approach, the development of a morphology detection method was found necessary.
Therefore the Algebraic Interfacial Area Density (AIAD) model has been developed in close cooperation with ANSYS. This model is now available in ANSYS Fluent and has to be tested.
Department: Computational Fluid Dynamics
Contact: Dr. Höhne, Thomas
Requirements
Studies in the field of process engineering/mechanical engineering/energy technology
- Interest in multiphase flows
- good written and spoken communication skills (German & English)
- Knowledge in the field of flow simulation with ANSYS Fluent advantageous
Conditions
Start: immediately possible
Processing time: up to 8 months (depending on university regulations)
Application with curriculum vitae and certificates
Remuneration according to in-house remuneration rules
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
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
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, Buntkiel, Lukas
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: Dr. Wagner, Michael, Dr. Bieberle, Martina
Requirements
• Programmierkenntnisse in MATLAB
• Grundkenntnisse zur numerischen Behandlung linearer Gleichungssysteme
Links:
