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[PyFoam] Automatic Parameter variation using pyFoam

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Old   July 27, 2015, 19:28
Default Automatic Parameter variation using pyFoam
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Hi all,

I've been trying to run a series of test cases on the cavity and pitzDaily tutorials and want to see solution behaviour under 4 different parameters. They are, inlet velocity,minimum mesh side length, timestep, and the inlet Courant number.

It occurred to me that pyFoam would be perfect for this, and thus installed and spent some time getting familiar with it.
I understood that I would need to adapt the parameter code variation given on the wiki page

Accordingly I wrote the following script

from PyFoam.Applications.PlotRunner import PlotRunner
from PyFoam.Execution.UtilityRunner import UtilityRunner
from PyFoam.LogAnalysis.FoamLogAnalyzer import FoamLogAnalyzer
from PyFoam.RunDictionary.SolutionFile import SolutionFile
from PyFoam.RunDictionary.SolutionDirectory import SolutionDirectory

solver = "icoFoam"
case = "cavity"




for i in range(nr+1):
    # Set the boundary condition at the inlet
    print "Inlet velocity:",val
    sol.replaceBoundary("inlet","(%f 0 0)" %(val))

run= PlotRunner(FoamLogAnalyzer(),argv=[solver,".",case],silent=True)

print "Last Time = ",dire.getLast()

dire.lastToArchive("vel=%g" % (val))
which resulted in the following error when I ran it

Traceback (most recent call last):
  File "", line 28, in <module>
    run= PlotRunner(FoamLogAnalyzer(),argv=[solver,".",case],silent=True)
  File "/usr/lib/python2.7/site-packages/PyFoam-0.6.5-py2.7.egg/PyFoam/Applications/", line 60, in __init__
  File "/usr/lib/python2.7/site-packages/PyFoam-0.6.5-py2.7.egg/PyFoam/Applications/", line 136, in __init__
  File "/usr/lib/python2.7/site-packages/PyFoam-0.6.5-py2.7.egg/PyFoam/Basics/", line 72, in __init__
    self.argLine=[str(a) for a in args]
TypeError: 'FoamLogAnalyzer' object is not iterable
I had originally tried with BoundingLogAnalyser as is given in the tutorial, but it threw up an identical error, complaining that the object was not iterable.
I'd really appreciate some help understanding this.

P.S I know there is a pyFoam utility, pyFoamRunParameterVariation, which would help vastly in this case but I'm still unsure about the format of its input file. Any help with that would also be appreciated
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parameter variation, pyfoam

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