Computational Fluid Dynamics
Computational Fluid Dynamics offer the possibility to virtually investigate flows on the computer. By using methods and models tailored to the application and with the help of modern high-performance computers, the simulations provide precise insights into the processes within the flow.
In addition to basic research on turbulence in generic configurations (duct and pipe flow, convection cells), the main focus of our team is on the interior ventilation of vehicles and the airflow around vehicles.
In terms of the airflow around a vehicle, for example, we study train geometries with low aerodynamic drag combined with high crosswind stability. For this purpose, the complex transient processes of real inflow conditions are simulated and their effects on the train are analyzed. Based on the results, the vehicle shape can be numerically optimized.
The interactions between ventilation systems, body heat and environmental conditions determine the airflow in the vehicle interior. To simulate the interior airflow, these interactions must be represented using suitable calculation methods.
An important area of application is predicting the dispersion of aerosols. By coupling the flow to virtual particles, their paths through the cabin can be calculated. The calculation of entire aerosol clouds can be used to facilitate assessing the infection risks or to determine the ideal positions for smoke detectors.
In addition to purely numerical investigations, we work closely with the experimental teams in our department to simulate specific test setups. This allows us to supplement the measured data with numerical results, for example at locations that are difficult to access by measurement. At the same time, the measurements serve as a reference for the ongoing validation and further development of our numerical methods.