Computational Methods
At FKFS computational fluid dynamics is used in aerodynamics as well as aeroacoustics. These simulations are accompanied by validation experiments in the wind tunnels in the scales 1:5, 1:4 and 1:1. The simulations are performed on the FKFS cluster with 512 CPUs.
- View of the simulated flow field (total pressure coefficient) around a vehicle model
- Comparison of integral coefficients from the simulation with EXA PowerFLOW® and experiment (wind tunnel with road condition simulation)
The FKFS employes state-of-the-art RANS and Lattice-Boltzmann Methods for computational simulation. Validations are performed for the flow around the vehicle, engine compartment flow and the effect of the wheel rotation. The simulation of the engine compartment flow is important for the thermal management, whereas the wheel rotation and the moving ground take significant effect on the flow field around the vehicle. Validations were performed using simple reference models as well as detailed full scale vehicles.
- Representation of calculated component temperatures at an engine mount.
Component temperatures are calculated, e.g. using RadTherm™. This 3D program is particularly used for calculations with high thermal radiation value, e.g. for calculating the temperatures at the engine mount depicted below in the direct vicinity of an exhaust system. Convective heat flows rates from CFD calculations can be transferred cell by cell to RadTherm™ via corresponding interfaces.
Innovative morphing tools are used for parameter studies and qualitative geometry variations.
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