Practical trainings, student assistants and theses

Fine temperature mapping using optical fibers (Id 298)

Student practical training / Bachelor theses / Master theses / Diploma theses / Compulsory internship / Volunteer internship

Foto: Fisens ©Copyright: Sylvie Su

The recent development of optical fibers with Bragg grating technology (FBG) [1] allows to measure very small deformation of the fiber, typically due to strain or temperature [2]. The optical fibers are very small (~200μm diameter) and thus present a promising alternative to in-bulk measurement with minimal disturbances of the flow. This new measurement technique is of particular interest in thermally driven flows, where the temperature spatio-temporal distribution provides crucial information about the flow mechanisms. The midterm goal is to use several optical fibers to map a layer of liquid metal for investigation of turbulent superstructures dynamics.

The objective of this project is to benchmark and quantify the performances of a commercial FBG for fine temperature mapping and tracking.

References:
[1] Fiber Bragg gratings, Review of Scientific Instruments, 68, 4309 (1997); https://doi.org/10.1063/1.1148392
[2] Fiber Bragg grating sensors for monitoring of physical parameters: A comprehensive review. Optical Engineering, 59(6), 060901. https://doi.org/10.1117/1.OE.59.6.060901

Scientific context: This project is part of the thematic group on Rayleigh-Bénard convection.

Main tasks:
  • set up and calibrate the temperature sensors,
  • acquire data on various temperature profile configurations,
  • analyse data and optimize the experimental protocol.

Department: Magnetohydrodynamics

Contact: Su, Sylvie

Requirements

  • Basics in data analysis and/or coding (e.g. Python, Matlab or similar)
  • Motivation to run an exploratory laboratory experiment
  • Good English communication skills (oral and written)

Conditions

Start: Spring-Summer 2021
Duration: 3-5 months
Remuneration: Available, paid according to HZDR-internal tariff

Links:

Online application

Please apply online: english / german

Druckversion


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

Foto: Study of a liquid metal battery module ©Copyright: Dr. Michael Nimtz, ©Michael NimtzIn 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

Druckversion

×