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An easily implemented task-based parallel scheme for the Fourier pseudospectral solver applied to 2D Navier-Stokes turbulence. (English) Zbl 1093.76048
Summary: An efficient parallel scheme is proposed for performing direct numerical simulation (DNS) of two-dimensional Navier-Stokes turbulence at high Reynolds numbers. We illustrate the resulting numerical code by displaying relaxation to states close to those that have been predicted by statistical-mechanical methods which start from ideal (Euler) fluid mechanics. The validation of these predictions by DNS requires unusually long computation times on single-CPU workstations, and suggests the use of parallel computation. The performance of our MPI Fortran 90 code on the SGI Origin 3800 is reported, together with its comparison with another parallel method. A few computational results are presented that illustrate tests of the statistical-mechanical predictions.

MSC:
76M22 Spectral methods applied to problems in fluid mechanics
76D05 Navier-Stokes equations for incompressible viscous fluids
76F65 Direct numerical and large eddy simulation of turbulence
65Y05 Parallel numerical computation
Software:
MPI; MPI/MPICH
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