| (349) |
The most accurate discretization schemes in STAR-CCM+ are the second-order upwind and central differencing schemes. The second-order upwind is the most accurate scheme for steady-state calculations, while the kinetic energy-preserving properties of the central differencing scheme make it appropriate for large eddy simulation (LES). Therefore, for detached eddy simulation (DES) it would be advantageous to blend both approaches as follows:
|
| (349) |
where 
is a blending factor that is chosen as appropriate for the flow regime. The face values 
and 
, are linearly interpolated from the cell values on either side of the face using the reconstruction gradients, as with the second-order upwind schemes