Contrib/PyFoam
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Contents
1 Short description
This Python-library can be used to
- analyze the logs produced by OpenFoam-solvers
- execute OpenFoam-solvers and utilities and analyze their output simultaneously
- manipulate the parameter files and the initial-conditions of a run in a non-destructive manner
2 Motivation
TODO
3 Examples
TODO: insert code examples
This example does 10 runs of the same case. For each case a different velocity at the inlet is set. After the simulation has ended the mass flow (with this utility) and the pressure difference (with this utility) are calculated and written to the file InflowVariationResults. In addition to this the data of the last time-step is saved to a separate directory (for further analysis):
from PyFoam.Execution.ConvergenceRunner import ConvergenceRunner from PyFoam.Execution.UtilityRunner import UtilityRunner from PyFoam.LogAnalysis.BoundingLogAnalyzer import BoundingLogAnalyzer from PyFoam.RunDictionary.SolutionFile import SolutionFile from PyFoam.RunDictionary.SolutionDirectory import SolutionDirectory solver="simpleFoam" case="pseudoPoro" pCmd="calcPressureDifference" mCmd="calcMassFlow" dire=SolutionDirectory(case,archive="InletVariation") dire.clearResults() dire.addBackup("PyFoamSolve.logfile") dire.addBackup("PyFoamSolve.analyzed") dire.addBackup("Pressure.analyzed") dire.addBackup("MassFlow.analyzed") sol=SolutionFile(dire.initialDir(),"U") maximum=1. nr=10 f=dire.makeFile("InflowVariationResults") for i in range(nr+1): val=(maximum*i)/nr print "Inlet velocity:",val sol.replaceBoundary("rein","(%f 0 0)" %(val)) run=ConvergenceRunner(BoundingLogAnalyzer(),argv=[solver,".",case],silent=True) run.start() print "Last Time = ",dire.getLast() pUtil=UtilityRunner(argv=[pCmd,".",case],silent=True,logname="Pressure") pUtil.add("deltaP","Pressure at .* Difference .*\] (.+)") pUtil.start() deltaP=pUtil.get("deltaP")[0] mUtil=UtilityRunner(argv=[mCmd,".",case,"-latestTime"],silent=True,logname="MassFlow") mUtil.add("mass","Flux at (.+) = .*\] (.+)",idNr=1) mUtil.start() massFlow=mUtil.get("mass",ID="raus")[0] dire.lastToArchive("vel=%g" % (val)) dire.clearResults() print "Vel: ",val,"DeltaP: ",deltaP,"Mass Flow:",massFlow f.writeLine( (val,deltaP,massFlow) ) sol.purgeFile()
4 Installation
- Download the tar file with the sources
- Untar it
- Go to the directory PyFoam-0.1
- Install it with the command
python setup.py install
5 Library Documentation
The tar-file contains the documentation of the Library as HTML (in the folder doc)
6 History
- 2005-08-15: Version 0.1
--Bgschaid 21:50, 15 Aug 2005 (CEST)