The analysis of the spectral eddy viscosity is a handy tool to analyze the performance of LES methods. It reflects the cumulated effect of numerical discretization and turbulence subgrid-scale model on the spectral energy transfer. We compute this quantity by filtering and truncating data from direct numerical simulations of neutrally and stably stratified homogeneous turbulence. The results are used for testing of implicit and explicit LES methods. We find indications that for stably stratified turbulence it is necessary to use different subgrid-scale models for the horizontal and vertical velocity components.
|Title of host publication||International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013|
|Publication status||Published - 1 Jan 2013|
|Event||8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013 - Poitiers, France|
Duration: 28 Aug 2013 → 30 Aug 2013
|Conference||8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013|
|Period||28/08/13 → 30/08/13|