Running large grids using OpenFOAM on XSEDE Kraken Karthik Rudra Reddy https://conferences.xsede.org/c/message_boards/find_message?p_l_id=&messageId=582011 2014-01-30T18:57:27Z 2013-08-23T00:44:38Z

Hi all,<br /><br />I&#039;ve been running simulations using OpenFOAM on Kraken for sometime now. Recently I tried running a grid with ~10M cells, but ran into memory issues while trying to do domain decomposition (using decomposePar). I also tried creating some simple grids using OpenFOAM&#039;s blockMesh utility to see how large a grid it can handle. The utility was able to generate grids with ~6M cells, and for larger grids, would return this error message:<br /><br />new cannot satisfy memory request.<br />This does not necessarily mean you have run out of virtual memory.<br />It could be due to a stack violation caused by e.g. bad use of pointers or an out of date shared library<br />Aborted<br /><br />This was while I was working on the login nodes (with 8GB memory). I recently submitted a ticket regarding this, and tech support suggested I use the compute nodes instead (with 16GB memory). This did take care of the memory issue. However, I&#039;m not really sure if this is a memory issue and not some other bug, since ~10M cells is not a big grid by today&#039;s standards. So I&#039;m curious to know if other people running OpenFOAM have encountered this error while working with large grids (&gt;10M cells). I&#039;d really appreciate if people who&#039;ve experienced this could comment here.<br /><br />Thanks,<br />Karthik

Karthik Rudra Reddy 2013-08-23T00:44:38Z