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How to plot change in pressure over time for a point in the mesh

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Old   October 14, 2008, 03:32
Default Hi! I'm using the engineFoa
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Johan Svensson
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Hi!

I'm using the engineFoam tutorial and want to plot the change in pressure for a point in the cylinder for different times (crank angles). Now I have plotted pressure over a line in the cylinder, and I get a plot of the pressure over this line for every time step (crank angle), and if I shorten the line it is approximately a point. Of course I can browse through all these plots to see how the pressure increases/decreases.

But how do I do to plot the pressure of a point directly against the time?

I appreciate any hints.

Thanks,

Johan
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Old   October 14, 2008, 08:21
Default Johan, I assume you are cur
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Robert Manning
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Johan,
I assume you are currently using Paraview to create these plot. You may concider using the sampling utility in OpenFOAM. This will extract the pressure (or other parameters) at each time step. Then use your favorite plotting package. See http://www.opencfd.co.uk/openfoam/doc/sample.html
for details.

Bob
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Old   October 15, 2008, 03:08
Default Thanks a lot Bob, this seems t
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Johan Svensson
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Thanks a lot Bob, this seems to be very useful!

Johan
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Old   November 11, 2008, 20:56
Default Bob, I am so sorry I don't
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Venus Hon Sau Fong
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Bob,

I am so sorry I don't know how to get the data. In the tutorial "solidDisplacementFoam", how can I get the data (pressure versus time or U versus time)? Where did these data store?

Venus
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Old   November 12, 2008, 08:21
Default This may sound like (and proba
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Leonardo Honfi Camilo
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This may sound like (and probably is) a very dumb question(so bear with me), I had a naca0012 profile wing which I solved with simpleFoam, I wa wondering if it was possible to extract the pressure distribution (data) along the surface (cross-section) of the wing.

I though that sampleSurfDict would do that trick but I still was not able to find the data distribution over the surface

any tips?

thanks in advance

leo
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