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June 21, 2010, 06:50 |
run out of memory??
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#1 |
Senior Member
Join Date: Jan 2010
Posts: 110
Rep Power: 16 |
Hi all.
I am using ansys mesh. I am modeling a rectangular channel where the bottom consists by the contour of triangles equally spaced. I am using a sweep method. At the moment I have 115435 elements. I am trying to refine my mesh in order to see the improvements in results but I am receiving a message saying" The meshing run out of memory". I don´t understand this because I have already run some problems with almost 2000000 tetra elements. Could someone explain me this please?suggestions in order to solve this because I think i need a more refined mesh would also be nice. Best regards |
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June 21, 2010, 07:56 |
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#2 |
New Member
kits youhara
Join Date: May 2010
Posts: 14
Rep Power: 16 |
Maybe try symmetry? It seems weird though for such a number of cells.....
otherwise you could chop down the model and mesh seperately.... |
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June 21, 2010, 10:10 |
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#3 |
Member
Join Date: Oct 2009
Location: Italy
Posts: 88
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hi antonio
i had have the same problem and the massage have indicated me that the memory been too small. it' s strange that you write, are you sure of the number of element? |
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June 21, 2010, 10:54 |
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#4 |
Senior Member
Join Date: Jan 2010
Posts: 110
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Hi all.
unfortunately the numbers are correct (). Of course the geometry wasn`t the same as the present model but I have already did some simulations with almost 2000000 elements. |
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June 22, 2010, 01:43 |
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#5 |
Member
Burak
Join Date: May 2009
Posts: 90
Rep Power: 17 |
windows 32-bit can use only 3Gb of RAM, that allows approx. 3-3.5m elements.
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June 22, 2010, 10:14 |
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#6 |
Senior Member
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
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What mesher are you using? Some that are very efficient for tetra methods take more memory for their swept algorithms (although you would think it should be simpler).
Also, 32 bit systems have a 2Gig memory limit (not 3Gig) on any single process. Simon |
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June 22, 2010, 10:23 |
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#7 |
Senior Member
Join Date: Jan 2010
Posts: 110
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Hi all. Thanks for all your comments.
I am using ANSYS Meshing Application. Is this an example where the swept algorithm takes a lot of memory? Regards. |
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June 22, 2010, 10:31 |
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#8 |
Member
Burak
Join Date: May 2009
Posts: 90
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You are right, 2gb for a process.
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June 22, 2010, 14:51 |
yup...
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#9 |
Senior Member
Simon Pereira
Join Date: Mar 2009
Location: Ann Arbor, MI
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Yup, they are working on it (improved for memory efficiency at 12.0, 12.1 and 13.0). You could try the MultiZone method (Uses ICEM CFD Hexa automatically in the background). Multizone is more efficient. What version are you using and I could give more specific details.
Simon |
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June 28, 2010, 10:32 |
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#10 |
Senior Member
Join Date: Jan 2010
Posts: 110
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Hi all. Thanks a lot for your suggestions.
I have already managed to solve my problems. I have concluded that swept algorithms need much more memory than tetra methods (as Simon said). In order to resolve this I have basically split my domain in multibody parts instead of having only one volume for the entire domain. I have used the sweep method near the bottom and in the rest of my domain I have used automathic method. With this procedure I have been able to have a more refined mesh. Regards |
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May 30, 2013, 23:05 |
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#11 |
New Member
li haoran
Join Date: May 2013
Posts: 2
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Hi,Antonio,
I've meet the same problem with you.I wanna to know where are you from? |
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July 23, 2013, 06:58 |
meshing process ran out of memory
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#12 |
New Member
r.madhavan
Join Date: Jul 2013
Location: chennai
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July 23, 2013, 09:23 |
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#13 | |
Member
Frank Weise
Join Date: Mar 2009
Location: Germany
Posts: 55
Rep Power: 17 |
Hi rmadhavan4,
Quote:
regards Frank |
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July 25, 2013, 11:05 |
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#14 |
Super Moderator
Ghazlani M. Ali
Join Date: May 2011
Location: Tokyo, Japan
Posts: 1,385
Blog Entries: 23
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For people with good ram but still suffering from memory issue, try this trick:
Go to system panel -» System -» advanced system -» performances -» parameters -»Advanced -» Virtual Memory -» and give it a higher value... What i did here is taking some of the HDD memory and use it as RAM to help out a little bit. Let me know it this works... |
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