CFD Online Logo CFD Online URL
Home > Forums > OpenFOAM Running, Solving & CFD


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

LinkBack Thread Tools Display Modes
Old   March 13, 2009, 11:45
Default Hello, I have two questions
New Member
Kian Mehravaran
Join Date: Mar 2009
Location: London, U.K
Posts: 22
Rep Power: 10
kian is on a distinguished road

I have two questions:
1-I have set floatTransfer 0, and my parallel run still crashes, just at a later time compared to floatTransfer 1. The serial run doesn't crash. What parameters do I have to set to make it like the serial?
2-On the cluster that I'm using, there's a system wide installation of openfoam, (I have my own derived classes) and the etc/controlDict is read-only. How can I override that?

Many thanks,

Kian Mehravaran
kian is offline   Reply With Quote

Old   March 16, 2009, 17:28
Super Moderator
Mattijs Janssens
Join Date: Mar 2009
Posts: 1,419
Rep Power: 18
mattijs is on a distinguished road
1. usually flags a marginal case. The solvers do not precondition across processor boundaries so behave slightly different from running non-parallel. Try tightening solver tolerances and see if that makes a difference. floatTransfer will loose some precision so makes a marginal case worse.

2. copy the contents of the OpenFOAM-1.5/etc directory to ~/.OpenFOAM/1.5 and make your changes there (such that you have ~/.OpenFOAM/1.5/controlDict). This is the alternative location where OpenFOAM looks for its startup files.
mattijs 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

All times are GMT -4. The time now is 10:27.