FLUENT Fluent Software Trainin Ncct⊙tLD TRN-99-003 Two Equation Model: Standard k-E Model Turbulent Kinetic Energy Ok aU, aUaU a ak Ox Ox: Ox:Ox ax Ox Destruction Convection Generation Diffusion Dissipation Rate ax. OxOx ax ax Convection Generation Diffusion Destruction Ok.CE, Cle, C2e are empirical constants (equations written for steady, incompressible flow w/o body forces) DIl c Fluent Inc. 2/20/01D11 © Fluent Inc. 2/20/01 Fluent Software Training TRN-99-003 Two Equation Model: Standard k-e Model Turbulent Kinetic Energy Dissipation Rate s ,se 1e 2e k ,C ,C are empirical constants (equations written for steady, incompressible flow w/o body forces) Convection Generation Diffusion Destruction r m m s - { re þ ý ü î í ì ¶ ¶ ¶ ¶ + ¶ ¶ ÷ ÷ ø ö ç ç è æ ¶ ¶ + ¶ ¶ = ¶ ¶ 14243 144424443 14 424443i t k i i j j i i j t i i x k x x U x U x U x k U ( ) Convection Destruction Generation Diffusion 14243 1444442444443 14 424443 14243 ÷ ÷ ø ö ç ç è æ - þ ý ü î í ì ¶ ¶ ¶ ¶ + ¶ ¶ ÷ ÷ ø ö ç ç è æ ¶ ¶ + ¶ ¶ ÷ ø ö ç è æ = ¶ ¶ k C x x x U x U x U k C x U i t i i j j i i j t i i 2 1 2 ( ) e r e m m s e e r e e e