Technical Paper
Computational Study of a DrivAer Model by Using the Partially-Averaged Navier-Stokes Approach in combination with the Immersed Boundary Method
2024-04-09
2024-01-2527
In SAE Technical Papers 2022-01-0889 and 2023-01-0561 (Basara et al.), it was shown that the same accuracy of predicted aerodynamic forces could be achieved for both types of computational meshes, the standard body mesh and the immersed boundary (IB) Cartesian mesh, by using the Reynolds-Averaged Navier-Stokes (RANS) k--f model as well as by using the Partially-Averaged Navier-Stokes (PANS) method. Based on the accuracy achieved, it was concluded in SAE 2023-01-0561 that further work can focus on evaluating the turbulence modeling on the immersed boundary meshes only. Therefore, we deal here with the PANS in conjunction with the IB method. The PANS approach, which belongs to the hybrid RANS-LES (scale resolving/high fidelity) methods, was developed to resolve a part of the turbulence spectrum adjusting seamlessly from RANS to DNS (Direct Numerical Simulation). This method is derived from the RANS model equations.