FLUENT mesh dependent memory requirements?

CDollarsign · April 3, 2013, 19:49

Hello,
I am trying to run a compressible simulation on a 8 million point mesh. My mesh quality is good and there are no issues when mesh is checked in FLUENT. It is taking me 8000 second per iteration. I have a 3.6 ghz Xeon 8 core processor with 16 gigs of ram. I am maxing out my resources when running the sim, so is there a recommended amount of ram per million nodes in mesh? I know some other programs require 3GB per million nodes, meaning I would need at least 24GB. Does this sound right?

Far · April 4, 2013, 00:14

For fluent with DP and coupled solver, the optimum mesh size would be 1 million nodes / 4 GB RAM . Please share your experience.

CDollarsign · April 4, 2013, 11:24

I am more looking for developer minimums. I have noticed that about 3-4Gb per million nodes in mesh runs smoothly. I would like to know what ANSYS suggests. I am trying to get something official so my department chair will pay for more RAM...

Far · April 4, 2013, 15:27

Memory requirement for CFX is almost half. So you can run 1.6-1.7 million case with ease on 4GB machine.

April 3, 2013, 19:49	FLUENT mesh dependent memory requirements?	#1
CDollarsign New Member Colin Fiola Join Date: Jul 2012 Posts: 19 Rep Power: 14	Hello, I am trying to run a compressible simulation on a 8 million point mesh. My mesh quality is good and there are no issues when mesh is checked in FLUENT. It is taking me 8000 second per iteration. I have a 3.6 ghz Xeon 8 core processor with 16 gigs of ram. I am maxing out my resources when running the sim, so is there a recommended amount of ram per million nodes in mesh? I know some other programs require 3GB per million nodes, meaning I would need at least 24GB. Does this sound right?

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April 4, 2013, 00:14		#2
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	For fluent with DP and coupled solver, the optimum mesh size would be 1 million nodes / 4 GB RAM . Please share your experience.

April 4, 2013, 11:24		#3
CDollarsign New Member Colin Fiola Join Date: Jul 2012 Posts: 19 Rep Power: 14	I am more looking for developer minimums. I have noticed that about 3-4Gb per million nodes in mesh runs smoothly. I would like to know what ANSYS suggests. I am trying to get something official so my department chair will pay for more RAM...

April 4, 2013, 15:27		#4
Far Senior Member Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,558 Blog Entries: 6 Rep Power: 54	Memory requirement for CFX is almost half. So you can run 1.6-1.7 million case with ease on 4GB machine.