CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLOW-3D

Memory Utilization with Flow-3D

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

Reply
 
LinkBack Thread Tools Display Modes
Old   February 11, 2010, 21:31
Default Memory Utilization with Flow-3D
  #1
Senior Member
 
Join Date: Mar 2009
Posts: 129
Rep Power: 7
ck5285 is on a distinguished road
All
noticed that by using SMP version the CPU utilization is high (without GMO option turn on) but memory utilization is always low at around 200MB-400MB. so I wonder why the program didn't fully utilize the memory size that my system have (32GB RAM) in order to provide additional speed up in simulation time?Thanks.
ck5285 is offline   Reply With Quote

Old   February 25, 2010, 13:25
Default
  #2
Senior Member
 
michael barkhudarov
Join Date: Mar 2009
Posts: 331
Rep Power: 8
MuxaB is on a distinguished road
Quote:
Originally Posted by ck5285 View Post
All
noticed that by using SMP version the CPU utilization is high (without GMO option turn on) but memory utilization is always low at around 200MB-400MB. so I wonder why the program didn't fully utilize the memory size that my system have (32GB RAM) in order to provide additional speed up in simulation time?Thanks.
The memory usage is largely determined by the mesh size and the selection of physical and numerical options. SMP parallelization in FLOW-3D does not add much to this, although it could have been done in a way that would consume much more memory - in proportion to the number of threads used, but this does not seem reasonable.
MuxaB is offline   Reply With Quote

Old   March 1, 2010, 00:50
Default
  #3
Senior Member
 
Join Date: Mar 2009
Posts: 129
Rep Power: 7
ck5285 is on a distinguished road
Michael
so can you advice what physic, solver setting & mesh size will allow full memory utilization? btw, should i expected simulation time speed up if the memory utilization is 100%?
ck5285 is offline   Reply With Quote

Old   March 1, 2010, 12:22
Default
  #4
Senior Member
 
michael barkhudarov
Join Date: Mar 2009
Posts: 331
Rep Power: 8
MuxaB is on a distinguished road
Quote:
Originally Posted by ck5285 View Post
Michael
so can you advice what physic, solver setting & mesh size will allow full memory utilization? btw, should i expected simulation time speed up if the memory utilization is 100%?
I am not sure what you mean by 100% memory utilization. Do you want FLOW-3D to use all 32 Gb of memory? If you are asking rather what options have been SMP parallelized, please see this article http://www.flow3d.com/resources/news...fall07_06.html.
MuxaB is offline   Reply With Quote

Old   May 12, 2010, 04:17
Default re
  #5
New Member
 
Seunghyun Yoon
Join Date: Jan 2010
Posts: 6
Rep Power: 6
shstyle0 is on a distinguished road
I don't think using more memory would speed up the simulation. memory is like a hard drive, a storage. Using 100% memory would mean you have 32 Gb for your computer to remember, which means your cpu would have more stuff to calculate.
If you use more cells (smaller cells), then your memory usage would go up, but the calculation time will be much longer I believe.
shstyle0 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
Flow meter Design CD adapco Group Marketing CD-adapco 3 June 21, 2011 09:33
mass flow in is not equal to mass flow out saii CFX 2 September 18, 2009 09:07
What is the difference between liquid reactive flow and gas reactive flow? James Main CFD Forum 6 May 15, 2009 13:14
potential flow vs. Euler flow curious ... Main CFD Forum 23 July 21, 2006 08:40
Plug Flow Franck Main CFD Forum 3 September 4, 2003 06:57


All times are GMT -4. The time now is 17:33.