Simulation of heat transfer in multiple impinging jets with scale-adaptive turbulence model

The capability of standard k-omega SST and scale-adaptive SST-SAS turbulence models to predict the turbulence and heat transfer of multiple impinging jets is analysed. The investigated case considers 13 symmetrically arranged turbulent impinging jets at inlet Reynolds number of around 20000 and nozzle-to-plate distance equal to four. The numerical simulations have been performed with the open-source code OpenFOAM and validated against the well-resolved LES results. The results have shown that the SST-SAS model exhibits the same high level of dissipation as the standard SST model. In comparison to the LES benchmark, both, SST and SAS-SST models predict higher eddy viscosity values and higher heat transfer rates.