Reynolds Averaged Navier Stokes (RANS) models are used predominately in engine applications. Appropriate variants of the standard k-ε model including linear and non-linear groups, as well as k-ω models are incorporated in STAR-CD to account for compression induced strain on the turbulence field, low Reynolds number effects and heat transfer.
When more detailed capture of turbulent flow structures is required, STAR-CD has a number of options for both LES and DES modeling. For LES, the Smagorinsky, dynamic Smagorinsky and WALE subgrid models are available. For DES, the latest delayed and improved delayed detached eddy simulation models are available for both k--ε and k-ω variants. Finally, the synthetic eddy method for the specification of realistic inflow boundary conditions is available for both LES and DES.