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

Pressure on the free slip wall

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 21, 2007, 13:36
Default Pressure on the free slip wall
  #1
yliu
Guest
 
Posts: n/a
Hi,everyone

I'm trying to simulate the flowfield of a wind turbine. The domain is shown below. The rotating frame of reference was used in the simulation.

The boundary condition of the cylindrical surface is free slip wall.

The result of streamline is reasonable. But the pressure on the free slip wall is reasonless.

The result of the pressure on the boundary is shown in the picture. How to solve this problem?

Best regards, yliu

  Reply With Quote

Old   March 21, 2007, 18:06
Default Re: Pressure on the free slip wall
  #2
Joe
Guest
 
Posts: n/a
No pics ...
  Reply With Quote

Old   March 21, 2007, 22:51
Default Re: Pressure on the free slip wall
  #3
yliu
Guest
 
Posts: n/a
It seems that my html code is not correct.

The picture URL is

http://lh6.google.com/image/THUWind/.../sDRzH1-Ivrg/G%3A%5CPressure.JPG

Thank you
  Reply With Quote

Old   March 22, 2007, 12:16
Default Re: Pressure on the free slip wall
  #4
Robin
Guest
 
Posts: n/a
Hi Yliu,

What are your other boundary conditions? The variation is only +/- 200 Pa, which is fairly small. It may simply be due to roundoff.

-Robin
  Reply With Quote

Old   March 27, 2007, 13:47
Default Re: Pressure on the free slip wall
  #5
HekLer
Guest
 
Posts: n/a
Try tri linear pressure interpolation. It can be activated on the advanced tab of the solver control branch.
  Reply With Quote

Old   March 30, 2007, 03:47
Default Re: Pressure on the free slip wall
  #6
yliu
Guest
 
Posts: n/a
Hi,Robin and Hekler Thank you! I have tried tri linear pressure interpolation. But there is no improvement. I think the mesh maybe too sparse.
  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
UDF for slip and moving wall lichun Dong FLUENT 3 March 26, 2014 05:37
moving and slip wall boundary hongchun FLUENT 4 July 9, 2010 11:29
New topic on same subject - Flow around race car Tudor Miron CFX 15 April 2, 2004 06:18
Gas pressure question Dan Moskal Main CFD Forum 0 October 24, 2002 22:02
what the result is negatif pressure at inlet chong chee nan FLUENT 0 December 29, 2001 06:13


All times are GMT -4. The time now is 19:06.