CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Wiki > A roughness-dependent model

A roughness-dependent model

From CFD-Wiki

(Difference between revisions)
Jump to: navigation, search
(Kinematic Eddy Viscosity)
(Kinematic Eddy Viscosity)
Line 1: Line 1:
==Kinematic Eddy Viscosity==
==Kinematic Eddy Viscosity==
-
Two-equation model :  
+
Two-equation model:  
-
:<math>  
+
<math>  
\nu _t  = C_{\mu} {{k^2 } \over \varepsilon }
\nu _t  = C_{\mu} {{k^2 } \over \varepsilon }
</math>
</math>
-
where : :<math> C_{\mu} = 0.09 </math>
+
where: <math> C_{\mu} = 0.09 </math>
-
One-equation model :  
+
One-equation model:  
:<math>  
:<math>  
-
\nu _t  = k^{{1 \over 2}} l
+
\nu _t  = l k^{{1 \over 2}} = {C_{\mu}}^{1/4} l_m k^{{1 \over 2}}  
</math>
</math>
 +
 +
Algebraic model:
 +
k^{{1 \over 2}} = {1 \over {C_{\mu}}^{1/4}}

Revision as of 14:31, 19 June 2007

Kinematic Eddy Viscosity

Two-equation model:  
\nu _t  = C_{\mu} {{k^2 } \over \varepsilon }
where:  C_{\mu} = 0.09

One-equation model:

 
\nu _t  = l k^{{1 \over 2}} = {C_{\mu}}^{1/4} l_m k^{{1 \over 2}}

Algebraic model: k^Template:1 \over 2 = {1 \over {C_{\mu}}^{1/4}}

My wiki