Programming turbulence models in FORTRAN
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The two-equation turbulence models Wilcox k-omega and Menter k-omega SST are programmed in FORTRAN and tested on the cases channel flow and backward-facing step. A short time step and a good initial field is required to obtain a solution. Results are adequate for most engineering purposes with a 15 \% error in predicted reattachment length. Gain from parallel programming is only found on the elliptic equation solver.