![]() ![]() The flat plate transitional flow simulation is performed for a freestream turbulence intensity of 1.8%, which predicts the beginning of bypass transition at Rex=9.2×105, turbulent overshoot in the wall shear stress profile for Rex=1.42-1.72×106, and a fully developed turbulent region for higher Rex. It is found that accurate turbulent predictions require a minimum of 48 collocation points per subdomain for Re ~ 105, with higher numbers required for Re ~ 106. ![]() The predictions show kinks in the turbulent statistics on coarser grids, but agree very well with DNS data for finer grids. The method provides super linear scalability of solver computational performance. The domain decomposition using the influence matrix method is implemented to achieve C1 continuity of the velocity across the domain interface. ![]() The parallel code is validated for LES of plane channel flow at Re=5, and applied for temporally developing flat plate transition simulations. The performance of a pseudo-spectral solver, which uses FFT in the streamwise and spanwise directions and Chebyshev polynomials in the wall-normal direction, is improved by implementing MPI domain decomposition for the Chebyshev collocation method using the influence matrix method. ![]()
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