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

dsmcFoam RAM and CPU estimation

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 4, 2014, 06:00
Default dsmcFoam RAM and CPU estimation
  #1
New Member
 
--
Join Date: Oct 2014
Location: Rostock
Posts: 5
Rep Power: 4
qwert is on a distinguished road
Dear OpenFoamers,
i'm quite new to OF and dsmc, but did my first simple cases with the help of this fantastic forum.
Now, I'm looking forward to solve my first large case (rocket borne instrument for density measurements) and have to make a coarse estimation on RAM and CPU requirements to chose a workstation (or make a decision to compute on a big cluster, to choose the right cluster).
My Case will have approx 5-7 Million Cells (very small scaled geometry; smallest= 0.1 mm) and 50-70 Million (assuming 10 dsmc particles per cell) .
Is anybody there who has an coarse approximation for RAM requirements? I would suggest 128GB could be enough, but its more a feeling from advantages in NS-CFD.
Also I'm trying to estimate CPU. I don't want to wait weeks to have results, due to time pressure (Master Thesis) and a lot of Mesh adaptation work. Could a 2x Intel Xeon E5-2697v3 2.6 2133 deal with this?
Also there is the Idea of GPU-Processing. I read that OpenFoam2.3.0 can handle with GPUP (as was posted here: GPU Linear Solvers for OpenFOAM)
Does the dsmcFoam solver offer this also?? Is there anybody with experiences in dsmcFoam and GPU- Processing? Can you recommend this for my as a newbie and semi much linux-experiences (2 month)?


I hope for some nice advices to any of the things involved in this post.


Yours, qwert
qwert 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
Superlinear speedup in OpenFOAM 13 msrinath80 OpenFOAM Running, Solving & CFD 18 March 3, 2015 06:36
New workstation for different usage scenarios - CPU and RAM natem Hardware 6 August 7, 2013 02:47
Messhing in Parallel: CPU <5% Ram > 90% Allrun Sleeping stark22 OpenFOAM Running, Solving & CFD 0 December 2, 2012 11:28
Increasing RAM decreases CPU time!!! Melih GULEREN FLUENT 2 April 5, 2004 06:21
more RAM or faster CPU?? Fabrizio Grieco CD-adapco 11 January 23, 2001 08:35


All times are GMT -4. The time now is 20:33.