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November 18, 2010, 08:15
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Ansys fluent in multi core cpu´s
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#1 |
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New Member
Antonio Lopez
Join Date: Nov 2010
Posts: 5
Rep Power: 15  |
Hi all!,
I´m working with ANSYS FLUENT with an i7 with Windows 7, but I have realised that FLUENT only use one core (13% of CPU). How could I make Fluent use all cores? Thanks 
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November 18, 2010, 12:02
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#2 |
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Senior Member
Vieri Abolaffio
Join Date: Jul 2010
Location: Always on the move.
Posts: 308
Rep Power: 16 |
i have to ask. have you set up the simulation to be solved in parallel?
look at the attached image |
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November 18, 2010, 13:12
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#3 |
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New Member
Antonio Lopez
Join Date: Nov 2010
Posts: 5
Rep Power: 15 |
Yes, I have done it, but when I select parallel (4 processes) fluent shows a warning message and i though parallel was only for more than one PC´s working in parallel.
In this case, why is the message warning? |
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November 18, 2010, 13:55
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#4 |
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Senior Member
Vieri Abolaffio
Join Date: Jul 2010
Location: Always on the move.
Posts: 308
Rep Power: 16 |
can you specify what the message says? in my setup i don't get any and i can select where to run the parallel solution, in my local machine or else.
take a look at the screenshots i have attached. |
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November 18, 2010, 23:41
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#5 |
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New Member
Sriram "Rob" Atchutuni
Join Date: Jul 2010
Location: Rochester, NY
Posts: 4
Rep Power: 15 |
Do you know if you have the parallel licenses to access additional cores? You will need HPC licenses to do this.
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November 20, 2010, 05:37
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#6 |
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New Member
Antonio Lopez
Join Date: Nov 2010
Posts: 5
Rep Power: 15 |
The error says:
Warning: No cached password or password provided. Use pass or cache to provide password Need I an special license? Thanks all
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November 28, 2010, 11:00
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#7 |
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New Member
Luke
Join Date: Nov 2010
Location: U.K.
Posts: 5
Rep Power: 15 |
It might be a licence issue, but try this, it worked for me on an i7/xeon 64-bit Win 7:
Open command prompt (cmd.exe) - Type CMD in start menu search bar. In Command Prompt, type: cd (fluent folder path) e.g.: cd C:\Program Files\ANSYS Inc\v121\fluent\ntbin\win64 Press Enter It should now say: C:\Program Files\ANSYS Inc\v121\fluent\ntbin\win64> Type: fluent (dimension)(double precision if wanted) (-t(number of parallel cores to be used)) e.g.: fluent 3ddp -t3 Press Enter This will make fluent run in 3d mode, with Double Precision, using 3 cores (advised on a 4-core machine so you can still use it for basic tasks during solve.) See if that works 
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December 1, 2010, 09:00
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Mpi
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#8 |
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Member
Ronald A. Lau
Join Date: Jul 2009
Location: Chicago
Posts: 30
Rep Power: 16  |
(Assuming you have the parallel licenses)
Did you install the HPMPI software? |
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September 14, 2011, 07:43
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Parallel Fluent
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#9 |
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New Member
Irshad
Join Date: Dec 2009
Location: Bangalore
Posts: 19
Rep Power: 16 |
I have 32 GB ram, Intel Xeon processor X5660, 2.80 GHz, 12 MB cache, 1333 MHz memory, Six-Core (two processors) and win7 . But I couldn't run fluent in parallel (local Machine). Please help me how to run it?
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September 28, 2011, 08:53
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#10 |
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Member
Vincent Meertens
Join Date: Sep 2009
Location: Belgium
Posts: 41
Rep Power: 16  |
Hi all,
I have installed Fluent 12 on Windows 7 pro (64 bit). The machine has following specs: Intel® Core i7 950 Processor (3,06Ghz - 8 MB) 12 GB DDR3 1600 MHz (3 x 4 GB) I have tried to open a parallel version of fluent (local Machine). When I want to start fluent I got following error: ------------------------------------------------- Loading "\VMEERTENS-PC\C$\PROGRA~1\ANSYSI~1\v120\fluent\fluent12.0.16\ lib\fl114-64.dmp" Done Welcome to ANSYS FLUENT 12.0.16 Copyright 2009 ANSYS Inc. All Rights Reserved. Unauthorized use, distribution or duplication is prohibited. ANSYS and FLUENT are trademarks or registered trademarks of ANSYS, Inc. or its subsidiaries in the United States or other countries. Loading "\\VMEERTENS-PC\C$\PROGRA~1\ANSYSI~1\v120\fluent\fluent12.0.16\ lib\flprim1119-64.dmp" Done. CX_Client_Register (rpc connect): No such file or directory Error: There is no active application. Error Object: (grid-valid?) version> Interrupting... Done. Error: There is no active application. Error Object: (grid-valid?) ------------------------------------------------- I tried the other settings under “parallel settings” but I still got the same error message. I didn’t install any MPI software because I thought it is already integrated in W7. But after reading some threads I’m not so sure anymore… Maybe this has something to do with the Fluent prerequisites I installed the first time? If I remember it well, Fluent installed the C++ 2005 version and asked for a change in the control panel for a SP. If anyone has an idea for successful parallel settings, please let me know. This could also just be a licensing/MPI problem, but I’m new in it. Sincerely Vincent |
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January 18, 2012, 15:25
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I need help in Fluent !
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#11 |
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New Member
Fahed Hamzeh
Join Date: Jun 2010
Posts: 2
Rep Power: 0 |
I have Tow PC'S 8 Cores each, i Have installed Ansys 14 . Now i'm working with Fluent.
How can i use the the tow PC's parallement to use 16 Cores ?. Do i need any addition license ? Please help me ....... Many thank's |
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November 10, 2012, 00:37
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#12 |
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New Member
Mazandaran
Join Date: Nov 2012
Posts: 1
Rep Power: 0 |
Only start Fluent with Win command prompt and enter your correct password !
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January 11, 2013, 20:29
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#13 |
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New Member
nguyentuan
Join Date: Sep 2012
Posts: 5
Rep Power: 13 |
I haven't been fixing ansys for running with 12 cores,
Have you fixed this problems for 16 cores ? Please share how to fix... Many thanks ! |
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May 7, 2013, 22:17
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#14 | |
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New Member
davia
Join Date: Jan 2013
Location: china
Posts: 14
Rep Power: 13 |
Quote:
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November 28, 2013, 18:18
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#15 |
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New Member
SP
Join Date: Nov 2013
Posts: 2
Rep Power: 0 |
When start Fluent setup, there are menu to put in the number of cores which you would like to run, however if you setting 4 cores one of them will run about 13%. I think it might because this core is use as the server core to manage other cores.
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November 28, 2013, 18:21
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#16 |
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New Member
SP
Join Date: Nov 2013
Posts: 2
Rep Power: 0 |
Yes, I'm able to run academic license only 8 core on 16 cores machine. For additional cores, you have to pay for that.
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December 19, 2013, 09:58
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#17 | |
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Member
George Pichurov
Join Date: Jul 2010
Posts: 52
Rep Power: 15 |
Quote:
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April 7, 2014, 06:31
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use this.
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#18 |
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New Member
sangjoon
Join Date: Jan 2014
Posts: 1
Rep Power: 0 |
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May 29, 2014, 03:09
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use this
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#19 |
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Member
Samer
Join Date: Jan 2013
Posts: 31
Rep Power: 13 |
to solve this when opening setup, choose parallel setting, and change the default one to pcmpi and it should works.
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June 3, 2016, 02:23
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#20 |
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New Member
mohsen
Join Date: Jun 2015
Posts: 25
Rep Power: 10 |
Hi every one
I have a problem with run ANSYS FLUENT in WORKBENCH software parallel mode. when i made Geometry and mesh in Gambit and export into Fluent, it has no problem during run with parallel mode, but,Now i have installed WORKBENCH software V16.1, after craete a mesh in it and run ANSYS FLUENT in parallel mode, after initialization and starting to run, i faced with a FATAL ERROR about finalized processing for cores. it's my pleasure if somebody could help me thanks |
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Linear Mode
