Variational multiscale turbulence modelling in a high order spectral element method
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- 作者：Carl Erik Wasberg ; Thor Gjesdal ; Bjø ; rn Anders Pettersson Reif ; Ø ; yvind Andreassen
- 关键词：Large eddy simulation ; Variational multiscale method ; Spectral element method ; Incompressible turbulent flow
- 刊名：Journal of Computational Physics
- 出版年：2009
- 出版时间：20 October 2009
- 年：2009
- 卷：228
- 期：19
- 页码：7333-7356
- 全文大小：1377 K
文摘
In the variational multiscale (VMS) approach to large eddy simulation (LES), the governing equations are projected onto an a priori scale partitioning of the solution space. This gives an alternative framework for designing and analyzing turbulence models. We describe the implementation of the VMS LES methodology in a high order spectral element method with a nodal basis, and discuss the properties of the proposed scale partitioning. The spectral element code is first validated by doing a direct numerical simulation of fully developed plane channel flow. The performance of the turbulence model is then assessed by several coarse grid simulations of channel flow at different Reynolds numbers.