Section: New Results
Hybrid FOM/ROM simulations for turbulent flows
We present below results concerning the application of the hybrid FOM/ROM method to a realistic problem in CFD.
The purpose of the study is to investigate the behavior of the flow past a car for several front bumper configurations. We here resort to Free-Form Deformation (FFD) based on two parameters to determine a satisfactory parametrization of all possible configurations, and we consider a steady RANS solver at
Figure 6 (left) shows the domain decomposition; in the blue region we solve the Full-Order model, while in the outer region we rely on a POD-Galerkin Reduced Order model.
The partitioning is obtained adaptively using the algorithm described in [15].
Figure 6 (right) shows the flow prediction error relative to dynamic pressure for the worst-case parameter:
the proposed method leads to