Reference Solutions for Benchmark Turbulent Flows in Three Dimensions
A grid convergence study is performed to establish benchmark solutions for turbulent flows in three dimensions (3D) in support of turbulence model verification campaign at the Turbulence Modeling Resource (TMR) website. The three benchmark cases are subsonic flows around a 3D bump and a hemisphere cylinder configuration and a supersonic internal flow through a square duct. Reference solutions are computed for Reynolds Averaged Navier Stokes equations with the Spalart Allmaras turbulence model using a linear eddy viscosity model for the external flows and a nonlinear eddy viscosity model based on a quadratic constitutive relation for the internal flow. The study involves three widely used practical computational fluid dynamics codes developed and supported at NASA Langley Research Center: FUN3D, USM3D, and CFL3D. Reference steady state solutions computed with these three codes on families of consistently refined grids are presented. Grid to grid and code to code variations are described in detail.