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Different response from 1.5 and 1.6 version of sonicFoam solver

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Old   October 12, 2009, 13:28
Default Different response from 1.5 and 1.6 version of sonicFoam solver
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Nishant
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Hi Foamers

I am trying to simulate a travelling pulse across the pipe using sonicFoam solver. While using OpenFoam-1.6 version, I have noticed that the pulse is traversing in quite an odd way. However with same set-up and boundary conditions (in fact everything same) the older openfoam-1.5 version is giving nice velocity profile. So, in short, the soncifoam solver of old OF-1.5 version is working good but not the newer OF-1.6 version


See the attach picture for the comparision.
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File Type: jpg sonicref1p5.jpg (53.1 KB, 10 views)
File Type: jpg sonicref1p6.jpg (64.1 KB, 10 views)
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Old   October 12, 2009, 13:45
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Nishant
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Can anybody tell me where things are going wrong?

why the new sonicfoam solver behaving so odd?

see the boundary conditions given below.

for pressure:
dimensions [1 -1 -2 0 0 0 0]; internalField uniform 100000; boundaryField { inlet { type zeroGradient; } outlet { type fixedValue; value uniform 100000; }
For Velocity:

boundaryField { inlet { type timeVaryingUniformFixedValue; value uniform (0 0 0); outOfBounds clamp; // (error|warn|clamp|repeat) fileName "inletu.dat"; } outlet { type outletInlet; outletValue uniform (0 0 0); value uniform (0 0 0); }regards,
Nishant
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