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

Large-scale simulation problem

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

LinkBack Thread Tools Display Modes
Old   November 7, 2010, 21:12
Default Large-scale simulation problem
New Member
Purushothama Chippar
Join Date: May 2010
Posts: 15
Rep Power: 7
Purushothama is on a distinguished road
Dear colleagues,

I am using starcd 3.26 with ufiles for fuel cell simulation. I have observed some problem while simulating large-scale geometry having around 9 million cells. I recieved sigpipe error after a iteration and here below i am attaching the screenshot. I am using parallel compuatation with 48 GB main server and 8 cores (each has 4 processors) with 4GB memory each and I decompose the geometry manually in Y direction using set files. The command i issued is

star -dp -mpi=mpich -decompmeth=s node1,4 node2,4......

The dynamic memory allocated is about 900 MB.

When i run the simulation in one processor using ''star -dp'' command., it runs fine, but very very slow. I face problem only during parallel run. I have tried parallel run for other simple geometries with 1-1.5 millions of cells, everthing is fine with these simulations. Only when the cell number exceeds 2 million, the simulation diverges.

I would appreciate if anyone can help me to solve this problem.

Thanks in advance.
Attached Images
File Type: jpg screenshot-7.JPG (86.7 KB, 7 views)
Purushothama 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
Domain format problem on airfoil flow simulation andrenonaka CFX 6 December 4, 2014 04:57
OpenFOAM-1.5 for large scale compute server SARU OpenFOAM Installation 2 May 19, 2010 22:06
problem about DPM of cyclone separator simulation jason FLUENT 4 November 12, 2007 04:15
tracer simulation for transient problem. John CFX 0 August 12, 2005 10:37
problem in large scale model limingtiger CD-adapco 0 July 30, 2005 03:59

All times are GMT -4. The time now is 02:44.