CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > ANSYS Meshing & Geometry

Parallel meshing using XP64 with PVM in CFX Mesh

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

Reply
 
LinkBack Thread Tools Display Modes
Old   April 21, 2010, 16:07
Question Parallel meshing using XP64 with PVM in CFX Mesh
  #1
Huw
New Member
 
Huw Morrison
Join Date: Apr 2010
Posts: 3
Rep Power: 8
Huw is on a distinguished road
I am trying to mesh a large (20 million cells) problem on a XP64 box with 4 cores. The problem is set to divide the geometry into 4 partitions using the parallel volume mesh technique as given in the manuals. However, when the meshing process starts (nvol3d.exe) only one instance of the process is carrying out any processing at any one time - and takes a long time to get anywhere. When I mesh on a 32 bit box, the all four meshing processes run simultaneously and much quicker - but they always run out of memory!

Has anyone encountered similar problems? Any suggestions?

Thanks,

Huw
Huw is offline   Reply With Quote

Old   June 8, 2010, 19:57
Default Techsupp?
  #2
Retired from CFD Online
 
PSYMN's Avatar
 
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
Posts: 2,660
Blog Entries: 1
Rep Power: 38
PSYMN has a spectacular aura aboutPSYMN has a spectacular aura about
It has been long enough that you probably are not going to get help from CFD-Online.

However, this would be a good question for CFX Tech support... Have you tried sending an email to "techsupp@ANSYS.com"?

Best regards,

Simon
PSYMN is offline   Reply With Quote

Old   June 9, 2010, 03:28
Default Tech Support
  #3
Huw
New Member
 
Huw Morrison
Join Date: Apr 2010
Posts: 3
Rep Power: 8
Huw is on a distinguished road
Simon,

Thanks for your post - I had kind of given up on hearing anything. We are having the same problem with Win7.

I have spoken to Tech Support in the UK, but not got anywhere! They weren't even familiar with parallel volume meshing (which is clearly described in the documentation). I'll try the email address you gave and see what happens.

Regards,

Huw
Huw is offline   Reply With Quote

Old   July 3, 2010, 14:33
Default
  #4
New Member
 
Sailor Bob
Join Date: Jul 2010
Posts: 1
Rep Power: 0
SailorBobx64 is on a distinguished road
Huw,

I have the same problem when running Win x64. Any new information from ANSYS?

Regards

Sailor Bob
SailorBobx64 is offline   Reply With Quote

Old   July 12, 2010, 10:24
Default Tech Support continued
  #5
Huw
New Member
 
Huw Morrison
Join Date: Apr 2010
Posts: 3
Rep Power: 8
Huw is on a distinguished road
Reassuring to hear that someone else has the same problem. I have been in contact with technical support via the email address supplied by PSYMN, which has accessed someone who seems to have been a little more interested in the problem. She wasn't familiar with the problem and without reiterating all the emails, they couldn't figure out why it was happening, and as CFX mesh is not present in release 13 they weren't too worried about solving the problem! Their solutions were:

1. Try a different mesher.
2. Try using a computer with more memory...
3. Try using splitting the domain into several parts, mesh them independently, and connect them via GGI interfaces.

As I don't have access to a different mesher, and I'm already running the problem on the computer with most memory I can find, it leaves me with GGI interfaces.

I haven't yet tried GGI interfaces so I can't comment on the success or otherwise of them. I'd be interested to hear of anyone else's experiences with them.

Hope this helps Sailor Bob.

Regards,

Huw
Huw is offline   Reply With Quote

Reply

Tags
64bit, cfx, mesh, parallel, pvm

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
Moving mesh Niklas Wikstrom (Wikstrom) OpenFOAM Running, Solving & CFD 122 June 15, 2014 06:20
Problem with meshing long, thin faces in CFX Martin CFX 3 January 8, 2009 21:51
Convergence moving mesh lr103476 OpenFOAM Running, Solving & CFD 30 November 19, 2007 15:09
Automatic Mesh Motion solver michele OpenFOAM Running, Solving & CFD 10 September 26, 2005 08:21
cfx, meshing + examples mark Main CFD Forum 1 December 22, 2000 00:10


All times are GMT -4. The time now is 14:41.