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An unsteady incompressible Navier–Stokes solver for large eddy simulation of turbulent flows

✍ Scribed by Won-Wook Kim; Suresh Menon

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
330 KB
Volume
31
Category
Article
ISSN
0271-2091

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✦ Synopsis

An unsteady incompressible Navier-Stokes solver that uses a dual time stepping method combined with spatially high-order-accurate finite differences, is developed for large eddy simulation (LES) of turbulent flows. The present solver uses a primitive variable formulation that is based on the artificial compressibility method and various convergence-acceleration techniques are incorporated to efficiently simulate unsteady flows. A localized dynamic subgrid model, which is formulated using the subgrid kinetic energy, is employed for subgrid turbulence modeling. To evaluate the accuracy and the efficiency of the new solver, a posteriori tests for various turbulent flows are carried out and the resulting turbulence statistics are compared with existing experimental and direct numerical simulation (DNS) data.

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