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

No speedup observed after using renumberMesh

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 3, 2016, 11:40
Default No speedup observed after using renumberMesh
  #1
Senior Member
 
Tarak
Join Date: Aug 2010
Location: State College, PA
Posts: 110
Rep Power: 8
Tarak is on a distinguished road
Hi,

I have been using renumberMesh to speed up my parallel calculation of pimpleDyMFoam (for 17 million cells sperad across 256 processors, having AMI interface) but didn't observe any increase in speed compared to a similar case without using renumberMesh.

I used the utility after the parallel decomposition and the bandwidth decreased significantly to 2379 from 67180 after using the utility. Can someone let me know if he/she has obtained any increase in speed using this utility?
Tarak is offline   Reply With Quote

Old   August 3, 2016, 11:54
Default
  #2
Member
 
Bruno Blais
Join Date: Sep 2013
Location: Canada
Posts: 61
Rep Power: 5
blais.bruno is on a distinguished road
I am not sure, but I believe you need to renumber before you decompose?

Also, if you have a large number of processor, the impact of renumbering will be much smaller.
blais.bruno 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
renumberMesh problems Jonathan OpenFOAM Pre-Processing 1 May 10, 2016 16:38
Some questions on blockMesh, decomposePar and renumberMesh Leech OpenFOAM Meshing & Mesh Conversion 12 May 1, 2015 16:24
RenumberMesh causing divergence altair279 OpenFOAM Running, Solving & CFD 0 April 1, 2015 18:33
Superlinear speedup in OpenFOAM 13 msrinath80 OpenFOAM Running, Solving & CFD 18 March 3, 2015 06:36
Parallel efficiency and speedup info lakeat OpenFOAM Running, Solving & CFD 2 August 31, 2009 11:05


All times are GMT -4. The time now is 14:09.