meshing on a cluster

jopawipr · January 15, 2010, 05:48

Hey everybody!
Does anybody know how meshing does work on a cluster?
Calculating is no problem, but just meshing?!

Thank you for your help!
Jopawipr

f-w · January 18, 2010, 15:35

Meshing is still serial, and not parallel. I haven't tried it yet, but I assume it is done on the controller if you're running in parallel.

Maddin · January 26, 2010, 11:45

Some meshing functions can run parallel but not all

ttl · February 12, 2010, 11:33

Hello,

I do this fairly often. It works well if you have a node that has more memory then the rest, which is the case on our clusters. I typically launch a job that only does the meshing and saves the file then I run the job later. I request a node by using a memory request in the job submission script then the queue manager directs the job to the node with more memory. That way if the job crashes half way through you don't have to remesh.

I have run jobs the remesh based on the flow field solution gradients during the solution but this is time consuming and not appropriate for all types of jobs. As others have said meshing is still primarily serial, which is a major weakness of the mesher IMHO.

Todd

Maddin · February 13, 2010, 06:06

Split the regions and mesh per region, then you can mesh with less memory.

January 15, 2010, 05:48	meshing on a cluster	#1
jopawipr New Member Johannes Join Date: May 2009 Posts: 16 Rep Power: 17	Hey everybody! Does anybody know how meshing does work on a cluster? Calculating is no problem, but just meshing?! Thank you for your help! Jopawipr

February 12, 2010, 11:33	Meshing on a cluster	#4
ttl New Member Todd Join Date: Nov 2009 Posts: 4 Rep Power: 17	Hello, I do this fairly often. It works well if you have a node that has more memory then the rest, which is the case on our clusters. I typically launch a job that only does the meshing and saves the file then I run the job later. I request a node by using a memory request in the job submission script then the queue manager directs the job to the node with more memory. That way if the job crashes half way through you don't have to remesh. I have run jobs the remesh based on the flow field solution gradients during the solution but this is time consuming and not appropriate for all types of jobs. As others have said meshing is still primarily serial, which is a major weakness of the mesher IMHO. Todd

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Best Meshing scheme for Cylinder	Nutrex	Main CFD Forum	4	July 29, 2008 12:03
Meshing locks workbench window.	andy2o	CFX	0	February 1, 2008 06:01
Meshing	Kevin	FLUENT	1	June 28, 2004 05:04
Singularity of grid?Volume meshing vs face meshing	Ken	Main CFD Forum	0	September 4, 2003 12:09
Volume Meshing & Face Meshing? singularity of grid	ken	FLUENT	0	September 4, 2003 12:08

January 18, 2010, 15:35		#2
f-w Senior Member Join Date: Apr 2009 Posts: 159 Rep Power: 17	Meshing is still serial, and not parallel. I haven't tried it yet, but I assume it is done on the controller if you're running in parallel.

January 26, 2010, 11:45		#3
Maddin Senior Member Join Date: Mar 2009 Posts: 260 Rep Power: 18	Some meshing functions can run parallel but not all

February 13, 2010, 06:06		#5
Maddin Senior Member Join Date: Mar 2009 Posts: 260 Rep Power: 18	Split the regions and mesh per region, then you can mesh with less memory.