On the magnitude of the subgrid-scale eddy coefficient in large-eddy simulations of turbulent channel flow
- 1 January 1986
- journal article
- Published by Cambridge University Press (CUP) in Journal of Fluid Mechanics
- Vol. 162 (-1) , 439-462
- https://doi.org/10.1017/s0022112086002112
Abstract
A series of large-eddy simulations of plane Poiseuille flow are discussed. The subgrid-scale motions are represented by an eddy viscosity related to the flow deformation Smagorinsky of the channel width 2Smagorinsky where turbulentReynolds number’ of the resolved-scale motions. A fixed value of 10 is regarded as determining the separation of scales into resolved and subgrid. The value of l0 is regarded as a measure of numerical resolution and values of Cs less than about 0.2 correspond to inadequate resolution.Keywords
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