|
[Sponsors] |
outputting averaged quantities to a text file in parallel execution |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
January 31, 2013, 17:08 |
outputting averaged quantities to a text file in parallel execution
|
#1 |
Member
Jace
Join Date: Oct 2012
Posts: 77
Rep Power: 15 |
Hi,
I am currently working with OpenFOAM-2.0.x, and trying to do some engine simulations. I want to calculate average quantities such as meanPressure, meanTemperature at every time step and output them to, say, summaryLog file. In serial execution, I have totalV = sum(mesh.V().field()); sumMass = fvc::domainIntegrate(rho).value(); pPistonMean = fvc::domainIntegrate(p).value()/totalV; aveT = fvc::domainIntegrate(rho*Tu).value()/sumMass; summaryLog << pPistonMean << " "<<aveT <<endl; and things seem to work fine. But when I try to run the code in parallel with 4 processors, the output doesn't make sense to me anymore. For instance, all 4 summaryLog files (1 per processor) will show the same sumMass when the mass contained in each decomposed domain should be different since the domain size varies a lot between processors. (I use scotch for domain decomposition) My questions are: 1. if each processor stores their own copy of mesh and internal fields such as, pressure, temperature, density. 2. when writing data to a text file, does each processor output the individual data it's holding, or does a certain processor does the task for all 4 processors. Any help is appreciated. thanks a lot! J. |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
wmake compiling new solver | mksca | OpenFOAM Programming & Development | 14 | June 22, 2018 06:29 |
[blockMesh] error message with modeling a cube with a hold at the center | hsingtzu | OpenFOAM Meshing & Mesh Conversion | 2 | March 14, 2012 09:56 |
OpenFOAM on MinGW crosscompiler hosted on Linux | allenzhao | OpenFOAM Installation | 127 | January 30, 2009 19:08 |
DxFoam reader update | hjasak | OpenFOAM Post-Processing | 69 | April 24, 2008 01:24 |
error while compiling the USER Sub routine | CFD user | CFX | 3 | November 25, 2002 15:16 |