CFD Online Logo CFD Online URL
Home > Forums > CFX

memory size

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

LinkBack Thread Tools Display Modes
Old   May 10, 2001, 02:58
Default memory size
Hu Wei
Posts: n/a
Hello, I want to run a case with about half million grid, does anyone know how many memory shoud i have to support that? Currently I am using TASCflow 2.10 under UNIX system with 512M memory. Thanks in advance.
  Reply With Quote

Old   May 10, 2001, 03:27
Default Re: memory size
John C. Chien
Posts: n/a
(1). You are pushing to the limit. Use 1Mega RAM for every 1K cells to estimate the RAM required. (2). so,500000 cells will likely require 500Mega RAM.
  Reply With Quote

Old   May 12, 2001, 19:35
Default Re: memory size
Dan Williams
Posts: n/a
It Depends on what sort of model complexity you are using. For standard hydrodynamics with k and epsilon used to model turbulence you will probably need about 280 (roughly) 4 byte words per node. That works out to 280*4*500,000/1024^2 = 534MB. I guess you need to purchase some more RAM.

  Reply With Quote

Old   May 14, 2001, 00:50
Default Re: memory size
Posts: n/a

when i ran the case with 400,000 grid (I also used k-e) ,TASCflow 2.10 used 500M ram and 600M swap file on SUN workstation

I guess you could run on your system but it take you too much time because swap file will be huge.

I think you should reduce the grid size if you want quick calculation.

If you reduce the number of GGI interfaces and blocks you could reduce the need of memory.
  Reply With Quote


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
Superlinear speedup in OpenFOAM 13 msrinath80 OpenFOAM Running, Solving & CFD 18 March 3, 2015 06:36
critical error during installation of openfoam Fabio88 OpenFOAM Installation 21 June 2, 2010 03:01
OF 1.6 | Ubuntu 9.10 (64bit) | GLIBCXX_3.4.11 not found piprus OpenFOAM Installation 22 February 25, 2010 14:43
Phase locked average in run time panara OpenFOAM 2 February 20, 2008 15:37
fluent add additional zones for the mesh file SSL FLUENT 2 January 26, 2008 12:55

All times are GMT -4. The time now is 05:28.