exaFOAM Microbenchmark MB10 - ERCOFTAC conical diffuser LES

The ERCOFTAC conical diffuser is a challenging case for turbulence modeling since it operates in the flow regime close to separation at the diffuser wall. Depending on the turbulence model the simulation may predict separation producing results, which do not correspond to the experimental ones.

This is shown in the description of the RAS microbenchmark based on the low Reynolds k-omega-SST turbulence model. Here, an additional setup and corresponding microbenchmark incorporating an LES model is proposed. Detailed information and case setup can be found in the README.md file contained in the case setup file.