# Switching off wall function

 User Name Remember Me Password
 Register Blogs Members List Search Today's Posts Mark Forums Read

 January 18, 2008, 10:51 Dear Forum A very good even #1 Senior Member   Join Date: Mar 2009 Posts: 248 Rep Power: 11 Dear Forum A very good evening to everybody I am using incompressible k-epsilon turbulence model and i have two questions related to its implementation. 1) Can the wall function can be switched off ? 2) In the base class for incompressible turbulence model yplus is being calculated as : Yp = pow(Cmu.value(), 0.25)*y_[patchNo] *sqrt(k()().boundaryField()[patchNo].patchInternalField()) /nu().boundaryField()[patchNo]; whereas by definition: y^{+} = \frac {u^{*} y} {\nu} where -> u^{*} - friction velocity -> y - near wall distance -> \nu - kinematic viscosity I request the forum users for explanation. Please comment if anybody knows how the two formulations relate. Best Regards Jaswinder

 January 21, 2008, 01:43 yes you can but you must make #2 Member   Mojtaba Shahmohammadian Join Date: Mar 2009 Posts: 73 Rep Power: 10 yes you can but you must make a new wall function and add it to the library of code and also change the wall function used in your turbulence model (e.g k-epsilon)

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post imano OpenFOAM Running, Solving & CFD 14 September 17, 2015 08:53 Ibuki FLUENT 2 January 20, 2009 04:41 Q FLUENT 0 December 10, 2005 12:23 Alex CFX 9 May 19, 2005 10:05 Sam Main CFD Forum 4 March 3, 2005 00:58

All times are GMT -4. The time now is 00:25.

 Contact Us - CFD Online - Privacy Statement - Top