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Post-Processing with Matlab

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Old   May 19, 2024, 06:08
Default Post-Processing with Matlab
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Hey everybody!


I am simulating an open channel flow with interFoam and I am intrested in the surface velocities of water flowing in the channel.
What I have done so far is loading the results in Paraview, extracting a specific time range and clipping the results with alpha.water = 0.5.
Does somebody know how I can extract the data just from the water surface? Because clipping just shows the complete water body.

How do I import this data into Matlab with the mesh from Openfoam?

I want to use Matlab because I want to compare physical experiment results which have been analyzed in Matlab with the simulation results.


I would appriciate your help
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Old   May 20, 2024, 00:06
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Hey everybody!


I am simulating an open channel flow with interFoam and I am intrested in the surface velocities of water flowing in the channel.
What I have done so far is loading the results in Paraview, extracting a specific time range and clipping the results with alpha.water = 0.5.
Does somebody know how I can extract the data just from the water surface? Because clipping just shows the complete water uno online body.

How do I import this data into Matlab with the mesh from Openfoam?

I want to use Matlab because I want to compare physical experiment results which have been analyzed in Matlab with the simulation results.


I would appriciate your help
Paraview can save data in VTK (Visualization Toolkit) format.
After applying the filter, go to "File" -> "Save Data As...".
Choose "VTK" format and select a filename.
In Matlab, you can use the vtkFile library (available online) to read VTK data. This library allows you to access the mesh information (points, connectivity) along with the surface velocity data.

Last edited by madeled; May 31, 2024 at 03:19.
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Old   May 22, 2024, 15:58
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Thank you for your answer! What I did so far was using point Data exported from Paraview and interpolating these Data values onto physical experiment results. The only difference is that the results from Openfoam are stored in the cell centers (vtk Data) right? And the point Data values are the one from the cell's corners?
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Old   May 24, 2024, 00:10
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Originally Posted by Charly23 View Post
Thank you for your answer! What I did so far was using point Data exported from Paraview and interpolating these Data values onto physical experiment results. The only difference is that the results from Openfoam are stored in the cell centers (vtk Data) right? And the point Data values are the one from the cell's corners? final grade calculator
How can I tell if the data are in RMS or Peak after loading the TesLab data file into Matlab?
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Old   May 24, 2024, 02:36
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Originally Posted by Charly23 View Post
Hey everybody!


I am simulating an open channel flow with interFoam and I am intrested in the surface velocities of water flowing in the channel. mapquest driving directions

What I have done so far is loading the results in Paraview, extracting a specific time range and clipping the results with alpha.water = 0.5.
Does somebody know how I can extract the data just from the water surface? Because clipping just shows the complete water body.

How do I import this data into Matlab with the mesh from Openfoam?

I want to use Matlab because I want to compare physical experiment results which have been analyzed in Matlab with the simulation results.


I would appriciate your help
Since you want to compare physical experiment results analyzed in MATLAB with simulation results, it makes sense to use MATLAB for this task. MATLAB is a powerful numerical computing environment widely used for data analysis, algorithm development, and simulations.
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