CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS

Wall Roughness bigger than smallest cell size

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

LinkBack Thread Tools Display Modes
Old   May 15, 2013, 04:20
Default Wall Roughness bigger than smallest cell size
New Member
Join Date: Aug 2011
Posts: 17
Rep Power: 8
Yur is on a distinguished road
Hi Guys,

I'm dealing with the following issue: Simulating a rotating wheel with different roughness values on the tire surface. 1, 2, 4 and 8 mm. My smallest cell size is 1.25.

When simulating with 2, 4 and 8mm my results get unreal. I understand that when penetrating the smallest cell size, my boundary layer model change. My question is how does it change? What is the physical description for this? Y+ values are around 140, so I'm already in the log law layer.

Yur is offline   Reply With Quote


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
Fluent3DMeshToFoam simvun OpenFOAM Other Meshers: ICEM, Star, Ansys, Pointwise, GridPro, Ansa, ... 48 May 14, 2012 05:20
unstructure mesh size control near to wall using gambit lalit kumar FLUENT 4 July 6, 2010 15:13
critical error during installation of openfoam Fabio88 OpenFOAM Installation 21 June 2, 2010 03:01
Errors running allwmake in OpenFOAM141dev with WM_COMPILE_OPTION%3ddebug unoder OpenFOAM Installation 11 January 30, 2008 21:30
Multicomponent fluid Andrea CFX 2 October 11, 2004 05:12

All times are GMT -4. The time now is 03:01.