CFD Online Logo CFD Online URL
Home > Forums > General Forums > Main CFD Forum

KIVA (Wall boundary conditions)

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

LinkBack Thread Tools Search this Thread Display Modes
Old   January 17, 2010, 16:16
Default KIVA (Wall boundary conditions)
New Member
Join Date: Jan 2010
Posts: 1
Rep Power: 0
Jazi is on a distinguished road
Hi Guys
I try to run a gas flow in a duct in Kiva with uniform inflow boundary. When I apply the law of the wall as a boundary condition in kiva, the tangential velocity components are not zero at the walls, just the normal velocity is zero.
Also the average velocity is different in various cross sections.
I am wondering if any body has any idea about these.
Jazi is offline   Reply With Quote

Old   May 11, 2010, 10:41
Join Date: Nov 2009
Location: United Kingdom
Posts: 35
Rep Power: 16
DaIN is on a distinguished road
Hi Jazy,

I also had a similar problem before, since law of the wall condition doesn't work properly when you have a fine mesh.
To start with, I could recommend you to try either running the code with different boundary condition (free slip to check out what's going on) or to have a proper look at the law of the wall subroutine.
I tried to deactivate it when i run my code with very fine meshes, and at least the code doesn't crash.

hope it helps
DaIN is offline   Reply With Quote


kiva, wall boundary conditions

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Wind turbine simulation Saturn CFX 58 July 3, 2020 01:13
Implementation of boundary conditions for FVM Tom Main CFD Forum 7 August 26, 2014 05:58
RPM in Wind Turbine Pankaj CFX 9 November 23, 2009 04:05
Wall boundary conditions for 3d-cylinder Martin Bellmann FLUENT 1 July 11, 2008 13:04
Boundary conditions? Tom Main CFD Forum 0 November 5, 2002 01:54

All times are GMT -4. The time now is 04:54.