CFD Online Logo CFD Online URL
Home > Forums > Hardware

Parallel computing

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

LinkBack Thread Tools Display Modes
Old   August 6, 2009, 10:58
Default Parallel computing
New Member
Join Date: Aug 2009
Posts: 7
Rep Power: 8
albertolot is on a distinguished road
hey there,
Im trying to use parallel computing to run better and faster my CFD software, but i really dont know how to do it in windows or lynux. would yo please help me.?
albertolot is offline   Reply With Quote

Old   August 10, 2009, 14:01
New Member
abdul samad
Join Date: Aug 2009
Posts: 14
Rep Power: 8
samad87 is on a distinguished road
i'm facing sm prblm in ths regard as well...
once chking the connectivity in fluent for parallel connection the connectivity shows all five nodes but all hv the same id...
i suppose tht the other 4 nodes beside teh adminiustrator r nt contributing at all.......cuz once i chk thru the task manager all 5 fluent are taking 20% load n there processes are mentioned against the id of the administrator......
samad87 is offline   Reply With Quote

Old   August 18, 2009, 04:58
Default Linux vs. Windows
New Member
Kutan Demirci
Join Date: Mar 2009
Location: Linz, Austria
Posts: 1
Rep Power: 0
Kutan is on a distinguished road
If you want to calculate your analyses faster and not to pay for clustering program than you should use linux. There is so many opensource clustering programs, which you can use not only for commerical programs but also the codes that you have developed or the programs like openFOAM.
Kutan is offline   Reply With Quote

Old   August 28, 2009, 12:50
Default Newbie at Parallel Computing
New Member
lawrence law
Join Date: Aug 2009
Posts: 10
Rep Power: 8
lawrencelaw is on a distinguished road

I just embarked on parallel computing and started with defining separate CPU processes for each individual CFD mesh, i.e. there are 5 zones meshes and therefore there will be 5 processes. I am using FDS5 MPI compiler and mpiexec.exe. What i did was to type the following in the command prompt (before this you have to set your environmental variable so that the path is recognized, i.e. when you type FDS5_MPI, it can execute regardless of your directory location).

I typed at command prompt: mpiexec -n 5 fds5_mpi.exe filename.fds
which effectively allocated the 5 meshes into 5 CPU processes.

I am using an i7 920 OC 4Ghz 6G DDR3 Ram, i was trying to fully utilize the 4 cores of the i7 chip using the parallel computing. The OS is Vista Ultimate 64bit.

My maiden attempt was only a partial success due to my observation that the CPU load is rather erratic (fluctuates between 40-80% load). Running the "same" parallel computing mode in Pyrosim (a FDS 3rd party GIU), the cpu load for the same CFD file is 100% and significantly faster processing speed.

Any help to show me where i am getting it wrong will be appreciated.


Last edited by lawrencelaw; August 28, 2009 at 12:52. Reason: Added OS information
lawrencelaw is offline   Reply With Quote

Old   December 21, 2009, 07:20
Default mohsen
New Member
Join Date: Dec 2009
Location: IRIRAN
Posts: 1
Rep Power: 0
mohsennassaji is on a distinguished road
Hi everybody
i need exact algorithm of CFD which used in software
i want to work on its algorithm
if you have any information please post it for me
or please send an email for me
mohsennassaji is offline   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
About Gambit and Parallel Computing yuki FLUENT 2 September 7, 2009 01:13
Diffusion equation solved using Parallel Computing Sachin Paramane Main CFD Forum 0 June 11, 2007 23:48
Parallel Computing on Multi-Core Processors Upgrading Hardware CFX 6 June 7, 2007 15:54
Parallel Computing peter Main CFD Forum 7 May 15, 2006 09:53
Parallel Computing Classes at San Diego Supercomputer Center Jan. 20-22 Amitava Majumdar Main CFD Forum 0 January 5, 1999 13:00

All times are GMT -4. The time now is 08:25.