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Budgets of Reynolds shear stress (TKE budgets) |
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March 16, 2015, 08:10 |
Budgets of Reynolds shear stress (TKE budgets)
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Prasun
Join Date: Jan 2015
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Hi
Is it possible to get data of each part of Reynolds stress transport equation from fluent directly? Reynolds stress transport equation can be defined as: ∂k/∂t= Pk + εk + πk + Dk + Tk − Ck where (i) Production (Pk) = −<uiuj> ∂Ui/∂xj (ii) Dissipation (εk) = −ν <∂ui/∂xj∂ui/∂xj> (iii) Pressure diffusion (πk) = −1/ρ ∂(<pui>)/∂xi (iv) Viscous diffusion (Dk) = (ν/2) ∂^2(<uiui>)/∂xj^2 (v) Turbulent diffusion (Tk) = −(1/2) ∂<uiuiuj>/∂xj (vi) Convection (Ck) = <uj>/2 ∂(<uiui>)/∂xj From fluent, Production and Dissipation can be easily obtained from plot section. But how can I get rest of the parts. And secondly, from fluent the RMS values of velocity fluctuation can be obtained but these are mean values(<u'^2>) how can I get fluctuation velocity (u') with time? Thanks in adv............ |
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