The Safety of Transport Containers division is seeking a student for a bachelor/master thesis on the further development of a Ventilation System Model of an Overseas Container for Experimental Studies Using Thermal Fluid-Structure-Interaction.
The division is engaged with research, testing and assessment of transport containers for radioactive materials. This includes mechanical and thermal safety verifications and the development of experimental and computational test methods for the analysis of transport containers.
As part of the experimental work, we perform a variety of load tests at our BAM Test Site for Technical Safety (TTS) close to Berlin. We offer good and close supervision of the work in a scientific environment.
Topic of the Thesis
At the BAM Federal Institute for Materials Research and Testing, the division "Safety of Transport Containers" deals, among other things, with the topic of heat input and heat dissipation in containers for dangerous goods. In a specific academic study, thermal tests will be conducted in an overseas container protected from wind. For this purpose, it is necessary to install a functioning ventilation system that covers all requested requirements. While the external boundary conditions are firmly defined by the overseas container, a ventilation concept necessary for the experiments must be investigated in advance in various parameter studies. The air flow to be investigated for this purpose is described by the compressible NAVIER-STOKES equations and additionally fully defined with adequate boundary conditions. While certain boundary conditions can be easily determined by a preliminary literature research, the inlet as well as outlet air flow must be investigated in a more detail by a parameterization. Likewise, the CFD model required for this study needs to be selected and analyzed. A hot test specimen must be integrated in the model and the heat transfer to the container environment will be determined.
The objective of the work is to analyze the ventilation inlets for different outlet velocities and find a mesh that best covers all outlet velocities, considering the constraints in the overseas container.
Task of the Thesis
In this work, a model for the overseas container with adequate boundary conditions will be further developed. The software for the simulation of the CFD analysis shall be the FVM-Software OpenFOAM. The inlet and outlet must be considered in the model and varied with user defined parameters in the context of a thermal fluid-structure interaction. A hot object must be implemented into the model and the heat flux via convection and radiation will be determined. Convection coefficients will be determined via CFD analysis. During a walk-through of the overseas containers standing on the BAM-TTS, the requirements for the inner airflow will be discussed and later examined in a more detail in the model during the analysis. A literature search is conducted to find appropriate modeling approaches and associated boundary conditions that best fit the problem at hand. Fluid characteristics (e. g. velocity, pressure, laminar, turbulent, thermal) will be analyzed and classified as part of the numerical investigations. In addition to the various dependencies of material properties, boundary conditions and other influences must be defined.
Agenda
- The thesis can be written in English or German
- A poster should be designed at the end of the work
- Literature research for materials, boundary conditions, modelling, validation
- Adaptation of an existing model towards thermal fluid-structure interaction with appropriate boundary conditions
- Convergence studies
- Parametrization of Inlets and evaluation for different outlet velocities
Qualifications:
- Experience
- Essential: Application of the simulation software OpenFOAM
- Basic knowledge with Python
Contact:
Dr. Tobias Gleim
Safety of Transport Containers division
Phone: +49 30 8104-3168
Email: Tobias.Gleim@bam.de