-To compute viscous flows, the Navier-Stokes governing equations are selected. The option `NAVIER_STOKES` implies that we wish to solve a laminar Naviwe-Stokes problem, and therefore, we must also set `KIND_TURB_MODEL= NONE`. For turbulent flows, SU2 solves the Reynolds-averaged Navier-Stokes equations by setting `SOLVER= RANS`, and SU2 currently contains implementations of the Spalart-Allmaras model and several variants (`SA`, `SA_NEG`, etc.) and the Shear Stress Transport (`SST`) model of Menter. If this were an inviscid flow problem, the user would enter `SOLVER = EULER` for the problem type. SU2 supports other governing equations, as well, and the user is invited to review the governing equations documentation page for a description of the possible options.
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