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How to calculate the water height | Water Surface Elevation | interFOAM

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Old   April 12, 2013, 18:35
Question How to calculate the water height | Water Surface Elevation | interFOAM
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Dear FOAMers,

i made a simulation with interFoam and want to do some post-processing now. My channel is 2m long, and i want to make a diagram, where the water height (alpha = 0.5) is plotted over the channel length.

I tried to play around with "Plot over Line", but this seems not to be the right approach.

In a second step, i want to make a diagram of the Froude-Number along the channel. I want to define the Fr-Number as a new variable, but therefore i also need the water height.

Thank you very much in advance!

Best regards,
Mathias
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Old   April 14, 2013, 13:50
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Greetings Mathias,

Sorry, I don't have much time to explain, so I'll refer you to a post I made some time ago: Temporal Analysis post #2

I think you can sort out several ideas from that post

Best regards,
Bruno
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Old   April 15, 2013, 13:49
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Dear Bruno,

thank you very much for your reply! In order to have a good "recipe" for the future, i want to list the steps i performed:
  • Make a contour of alpha1=0.5
  • Make a "Slice" which corresponds to the contour made above
  • Make a spreadsheet" view and export all data as a csv-file
  • In this file, all necessary data is included an can be visualized with GNU-Plot / Excel / whatever
Thank you very much!
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Old   April 16, 2013, 02:31
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Hi Mathias,

You could also apply the surfaceElevation tool, which is distributed along with waves2Foam. More details can be found here:

http://openfoamwiki.net/index.php/Co...rfaceElevation

and download instructions here:

http://openfoamwiki.net/index.php/Co...d_Installation

This utility also allows for runTime sampling of the free surface, hence you can have a higher frequency in the sampling compared to the information written into the time folders.

Kind regards,

Niels
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Old   April 16, 2013, 08:12
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Hi Niels,

thank you very much for this intersting hint, i will try it!

Best regards,
Mathias
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Old   April 20, 2013, 12:00
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Hi to all,
I follow the procedure proposed by wyldckat but when I aplly the filter Plot Selection over Time appear this error:

p, li { white-space: pre-wrap; } ERROR: In /home/opencfd/OpenFOAM/ThirdParty-2.1.x/ParaView-3.12.0/VTK/Filtering/vtkTable.cxx, line 353
vtkTable (0xc3dcaa8): Column "vtkValidPointMask" must have 73 rows, but has 81.




ERROR: In /home/opencfd/OpenFOAM/ThirdParty-2.1.x/ParaView-3.12.0/VTK/Filtering/vtkTable.cxx, line 353
vtkTable (0xc3dcaa8): Column "Time" must have 73 rows, but has 81.




ERROR: In /home/opencfd/OpenFOAM/ThirdParty-2.1.x/ParaView-3.12.0/VTK/Filtering/vtkTable.cxx, line 353
vtkTable (0xc3dcaa8): Column "Point Coordinates (0)" must have 73 rows, but has 81.




ERROR: In /home/opencfd/OpenFOAM/ThirdParty-2.1.x/ParaView-3.12.0/VTK/Filtering/vtkTable.cxx, line 353
vtkTable (0xc3dcaa8): Column "Point Coordinates (1)" must have 73 rows, but has 81.




ERROR: In /home/opencfd/OpenFOAM/ThirdParty-2.1.x/ParaView-3.12.0/VTK/Filtering/vtkTable.cxx, line 353
vtkTable (0xc3dcaa8): Column "Point Coordinates (2)" must have 73 rows, but has 81.




ERROR: In /home/opencfd/OpenFOAM/ThirdParty-2.1.x/ParaView-3.12.0/VTK/Filtering/vtkTable.cxx, line 353
vtkTable (0xc3dcaa8): Column "Point Coordinates (Magnitude)" must have 73 rows, but has 81.


Moreover the plot of H is an horizontal line (I'm not understand this result).


What is the error that appear?
There is a way to plot the Froude number (or the velocity) of the front of an air bubble that move forward along the channel?
thank to all


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Old   June 28, 2014, 09:11
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Hi everybody.
I have a problem like giack,(last question).
any idea would be helpful.
thanks to all.
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Old   August 16, 2014, 07:53
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Greetings to all!

@Amir: Unfortunately back then I didn't have enough time to ask giack for more information, so I have to ask you now: please provide more details, so that I can try and reproduce the same error message.
Otherwise, without being able to reproduce the error, I'm not able to diagnose the problem and to provide a solution for it

Best regards,
Bruno
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