Master (f/m/x)- Analysis of Microstructure Evolution in Thermochemical Energy Storage

DLR Institute of Engineering Thermodynamics; Stuttgart; Vor Ort; EUR 8.900 - 13.000; Teilzeit

Zusammenfassung

DLR Institute of Engineering Thermodynamics in Stuttgart offers a Master’s thesis project in image processing and modelling of porous media within the Computational Electrochemistry Department. In a thermochemical energy storage system, you will analyze high-resolution micro-CT time series to describe microstructure evolution and to reconstruct the bed deformation for macroscopic models.

The project combines AI-based methods with traditional image analysis and aims at robust pipelines for

Qualifikationen

• Degree in engineering or natural sciences (mechanical engineering, physics, process engineering, technical mathematics or a comparable field of study).
• Very good programming skills in Python (ideally experience with libraries such as NumPy, PyTorch, scikit-image).
• Interest in or prior knowledge of the field of (3D) digital image processing.
• Basic knowledge of the theory of porous media and numerical modelling and simulation.

Aufgaben

• Image preprocessing: denoising, segmentation (phase separation), and registration of time series images, including AI-based methods.
• Quantitative image analysis: describe microstructure (porosity, pore size distribution, connectivity) and deformation field over time.
• Modelling and validation: parametrize a macroscopic model from microstructure data and compare simulations with experiments.
• Evaluation and documentation of results.

Kenntnisse

Python

NumPy

PyTorch

scikit-image

Ausbildung

Master's degree in engineering or natural sciences

Tools

NumPy

PyTorch

scikit-image

Jobbeschreibung

Please find our joint appointments and professorships on our website: Joint appointments / Professorships

Master (f/m/x)- Analysis of Microstructure Evolution in Thermochemical Energy Storage

Job Description

Req ID: 6740

Place of work: Stuttgart

Starting date: sofort

Career level: Student research project and final thesis

Type of employment: Part time

Duration of contract: 6 Monate

Remuneration: Remuneration is in accordance with the Collective Agreement for the Public Sector - Federal Government (TVöD-Bund).

Enter the fascinating world of the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt e. V.; DLR) and help shape the future through research and innovation! We offer an exciting and inspiring working environment driven by the expertise and curiosity of our 12,000 employees from 100 nations and our unique infrastructure. Together, we develop sustainable technologies and thus contribute to finding solutions to global challenges. Would you like to join us in addressing this major future challenge? Then this is your place!

Vacancy-ID: 6740

Place of work: Stuttgart

Starting date: sofort

Career level: Student research project and final thesis

Type of employment: Part time

Duration of contract: 6 Monate

Remuneration: Remuneration is in accordance with the Collective Agreement for the Public Sector - Federal Government (TVöD-Bund).

Short Description of Institute/Facility - At the Institute of Engineering Thermodynamics we investigate the energy storage systems of today and tomorrow.

The Computational Electrochemistry Department of the Institute for Technical Thermodynamics in Stuttgart is offering a Master's thesis project in the field of image processing and modelling of porous media.

In a thermochemical energy storage system, thermal energy is stored via a reversible chemical reaction. This enables the storage of large amounts of energy over long periods. In view of the worldwide expansion of renewable energies and the heat transition (Wärmewende) in Germany, thermochemical storage systems are therefore being examined for their suitability for many potential applications – from small short-term storages, such as in thermochemical heat pumps, to large seasonal thermal energy storage systems.

The core component of such a storage system is a fixed bed of powder containing the reactive material. Additionally, there are pipes for the supply and removal of gaseous reactants as well as for heat transport during the charging and discharging of the storage system. The performance of these systems depends significantly on the geometry and the temporal evolution of the microstructure (e.g., due to material ablation, sintering or chemical conversion). To understand these processes, high-resolution micro-CT image series (time series) were recorded, enabling non-invasive observation of structural changes.

The challenge lies in the automated evaluation of these large amounts of data. The aim of this work is to develop a robust pipeline, for the analysis the image data in order to quantitatively describe the evolutionary changes of the microstructure, the reconstruction of the deformation of the bed as a whole, and finally transfer these findings into macroscopic models.

Specifically, the evolution of the microstructure over time is to be characterized, e.g., via pore and grain size distributions, and the deformation field of the bed as a whole is to be reconstructed. For this purpose, various methods of image registration, segmentation and analysis for porous media, including AI based methods are to be used.

We offer

DLR stands for diversity, appreciation and equality for all people. We promote independent work and the individual development of our employees both personally and professionally. To this end, we offer numerous training and development opportunities. Equal opportunities are of particular importance to us, which is why we want to increase the proportion of women in science and management in particular. Applicants with severe disabilities will be given preference if they are qualified.

Your Tasks

• Image preprocessing: Implementation of methods for denoising, segmentation (phase separation), and registration/alignment of the time series images, including AI based methods.
• Quantitative image analysis: Characterisation of the microstructure (e.g., porosity, pore size distribution, connectivity) and reconstruction of its deformation field over time.
• Modelling & Validation: (Bonus) Parametrisation of a macroscopic model based on the acquired microstructure data and comparison of simulation results with experimentally measured data.
• Evaluation and documentation of the results.

Your Skills

• Degree in engineering or natural sciences (mechanical engineering, physics, process engineering, technical mathematics or a comparable field of study).
• Very good programming skills in Python (ideally experience with libraries such as NumPy, pyTorch, scikit-image etc.).
• Interest in or prior knowledge of the field of (3D) digital image processing.
• Basic knowledge of the theory of porous media as well as numerical modelling and simulation.
• A strong interest and talent for theoretical work and data analysis.

We offer

DLR stands for diversity, appreciation and equality for all people. We promote independent work and the individual development of our employees both personally and professionally. To this end, we offer numerous training and development opportunities. Equal opportunities are of particular importance to us, which is why we want to increase the proportion of women in science and management in particular. Applicants with severe disabilities will be given preference if they are qualified.

We look forward to getting to know you!

If you have any questions about this position (Vacancy-ID 6740) please contact:

Dr. Thomas Jahnke

Tel.: [phone]