|March 30, 2011, 08:22||
Defined Wall Shear Stress Boundary Condition
Join Date: Jan 2011
Posts: 4Rep Power: 7
I want to implement a boundary condition, where I can define the shear stress at a wall. First I tried to adopt the mutWallFunction for my purpose and modified it to calculate the turbulent viscosity as follows
mut = tauWall / gradU - mu
Unfortunately this only works well for coarse meshes. In other cases the velocity gradient becomes to large and the turbulent viscosity gets negative.
Is there a better way to implement such a boundary condition?
Thanks for your help!
|April 14, 2011, 12:44||
Eugene de Villiers
Join Date: Mar 2009
Posts: 725Rep Power: 13
You could create a specific wall boundary condition for U that overrides the snGrad fvPatchField function so as to provide a wall velocity gradient equal to: gradU = tauw / nutw
|Thread||Thread Starter||Forum||Replies||Last Post|
|External Radiation Boundary Condition for Grid Interface||CFD XUE||FLUENT||0||July 9, 2010 02:53|
|Wall shear stress distributions||en51nm||STAR-CD||2||January 28, 2010 05:42|
|Post processing - Wall shear stress||Carlo||CD-adapco||1||March 4, 2009 08:35|
|Applying Shear Stress at a Boundary Condition||Stephen||CFX||3||March 27, 2007 18:55|
|applying boundary condition on rotating wall||Haris Maharana||CD-adapco||2||January 16, 2001 13:03|