CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > OpenFOAM Running, Solving & CFD

MRFSimpleFoam strange velocities

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

Reply
 
LinkBack Thread Tools Display Modes
Old   September 4, 2009, 08:21
Default MRFSimpleFoam strange velocities
  #1
Senior Member
 
linnemann's Avatar
 
Niels Nielsen
Join Date: Mar 2009
Location: NJ - Denmark
Posts: 448
Rep Power: 14
linnemann will become famous soon enough
Hi

I'm doing some openwater propeller calculations and I'm using MRFSimpleFOAM.

What I've done is to create a 1/4cylinder, cyclic boundaries on the sides and used cellSet and setsToZones -noFlipMap to contain the propeller.

The proplem is when solving I see strange velocities at the interface between the MRFzone and the non-MRFzone, see attached picture.

Does anyone have any good suggestions?

The checkMesh shows everything as being ok.

Best regards

Linnemann
Attached Images
File Type: jpg MRF-errors.jpg (34.1 KB, 63 views)
linnemann is offline   Reply With Quote

Old   October 12, 2009, 06:49
Default
  #2
Senior Member
 
linnemann's Avatar
 
Niels Nielsen
Join Date: Mar 2009
Location: NJ - Denmark
Posts: 448
Rep Power: 14
linnemann will become famous soon enough
I've found that you need a smooth surface where the MRFzone cuts the mesh.

If that is done all is well.
__________________
Linnemann

PS. I do not do personal support, so please post in the forums.

Last edited by linnemann; October 12, 2009 at 09:30.
linnemann 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
MRFSimpleFoam Tutorial bastil OpenFOAM Running, Solving & CFD 48 August 1, 2012 10:00
Rotating objects Marcus Gellert (Gellert) OpenFOAM Running, Solving & CFD 17 December 14, 2010 16:06
Strange Velocity in impeller of MRFSimpleFOAM waynezw0618 OpenFOAM Running, Solving & CFD 50 December 21, 2009 10:45
Time mean velocities in moving meshes Pfalcon FLUENT 0 August 14, 2009 13:51
Derived velocities from loss coefficients ?? jakjak CFX 1 December 20, 2007 15:38


All times are GMT -4. The time now is 11:23.