SST k-omega model
From CFD-Wiki
(Difference between revisions)
(→Closure Coefficients and Auxilary Relations) |
(→Closure Coefficients and Auxilary Relations) |
||
| Line 25: | Line 25: | ||
:<math> | :<math> | ||
| - | F_2=\mbox{tanh} \mbox{max} { 2 \sqrt{k} \over \beta^* \omega y } , { 500 \nu \over y^2 \omega } | + | F_2=\mbox{tanh} \right[ \right[ \mbox{max} { 2 \sqrt{k} \over \beta^* \omega y } , { 500 \nu \over y^2 \omega } \right ] ^2 \right ] |
</math> | </math> | ||
Revision as of 07:36, 11 October 2005
Contents |
Kinematic Eddy Viscosity
Turbulence Kinetic Energy
![{{\partial k} \over {\partial t}} + U_j {{\partial k} \over {\partial x_j }} = \tau _{ij} {{\partial U_i } \over {\partial x_j }} - \beta ^* k\omega + {\partial \over {\partial x_j }}\left[ {\left( {\nu + \sigma_{k1} \nu _T } \right){{\partial k} \over {\partial x_j }}} \right]](/W/images/math/a/0/6/a068399c3d0288b112c831c476e3d2ab.png)
Specific Dissipation Rate
![{{\partial \omega } \over {\partial t}} + U_j {{\partial \omega } \over {\partial x_j }} = \alpha {\omega \over k}\tau _{ij} {{\partial U_i } \over {\partial x_j }} - \beta \omega ^2 + {\partial \over {\partial x_j }}\left[ {\left( {\nu + \sigma_{\omega 1} \nu _T } \right){{\partial \omega } \over {\partial x_j }}} \right] + 2( 1 - F_1 ) \sigma_{\omega 2} {1 \over \omega} {{\partial k } \over {\partial x_i}} {{\partial \omega } \over {\partial x_i}}](/W/images/math/5/c/7/5c7586a0a5764a6f207d4e5020c98e96.png)
Closure Coefficients and Auxilary Relations
![F_1=\mbox{tanh} \left\{ \left\{ \mbox{min} \left[ \mbox{max} \left( {\sqrt{k} \over \beta ^* \omega y}, {500 \nu \over y^2 \omega} \right) , {4 \sigma_{\omega 2} k \over CD_{k\omega} y^2} \right] \right\} ^4 \right\}](/W/images/math/1/4/3/1438132576e08de1da7394c694172485.png)
- Failed to parse (syntax error): F_2=\mbox{tanh} \right[ \right[ \mbox{max} { 2 \sqrt{k} \over \beta^* \omega y } , { 500 \nu \over y^2 \omega } \right ] ^2 \right ]
- Failed to parse (syntax error): F_2=\mbox{tanh} \right[ \right[ \mbox{max} \left( { 2 \sqrt{k} \over \beta^* \omega y} , { 500 \nu \over y^2 \omega } \right ) \right ] ^2 \right ]
References
- Wilcox, D.C. (1988), "Re-assessment of the scale-determining equation for advanced turbulence models", AIAA Journal, vol. 31, pp. 1414-1421.
