CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

Use of enhanced wall function in the RSM viscous model for a 3D sector

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   March 27, 2012, 07:40
Default Use of enhanced wall function in the RSM viscous model for a 3D sector
  #1
New Member
 
Roj
Join Date: Jan 2012
Posts: 1
Rep Power: 0
a.hasan is on a distinguished road
Hi all, I am running a 3D sector (60degree) of two disks, one stationary and the other rotating about the x-axis enclosed by a shroud, thus the outlet is treated as a wall. Periodic boundary conditions were enabled. The turbulence model used was the RSM model, with Linear pressure strain, wall reflection effects enabled and full buoyancy effects. Enhanced wall functions was chosen without pressure gradient effects or thermal effects. Once initialized the simulation runs for only 20 iterations, the y+ was found out to be inside the viscous sublayer with values between 1 & 4, before the turbulent viscosity ratio is limited and divergence occurs. It was also tried for a 2D axisymmetric case (enhanced wall function, RSM with y+<1) and the same thing occurs but after 8000 iterations. There were no problems with enhanced wall functions for k-epsilon, what is the problem in enhanced wall function for RSM?

Cheers

Last edited by a.hasan; March 27, 2012 at 08:22.
a.hasan is offline   Reply With Quote

Reply

Thread Tools
Display Modes

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Use of k-epsilon and k-omega Models Jade M Main CFD Forum 12 June 2, 2015 13:16
Version 15 on Mac OS X gschaider OpenFOAM Installation 120 December 2, 2009 11:23
Problem with compile the setParabolicInlet ivanyao OpenFOAM Running, Solving & CFD 6 September 5, 2008 20:50
Multicomponent fluid Andrea CFX 2 October 11, 2004 05:12
Wall function in adverse pressure gradients stephane baralon Main CFD Forum 11 September 2, 1999 04:05


All times are GMT -4. The time now is 12:52.