Importing VTU/VTK into MATLAB/Python

[Buhari Ibrahim]

Hi everyone,

Is there a way to import .vtu/.vtk files into Matlab? I was thinking of converting them into HDF5 files for use in Matlab, but could not find a way doing that. Does anyone have an idea how to do that, or just a better way to process .vtu/.vtk data in Matlab in general? Thank you.

Buhari Ibrahim.

[Farid Mehri Sofiani]

Hello Buhari,

I am using meshio library (https://pypi.org/project/meshio/2.3.5/) in Python. You can process .vtu data into data frames using numpy and pandas and take them into MATLAB. Hope this helps. 

kind regards,

Farid   

[Buhari Ibrahim]

Hi Farid,

Thank you very much for this information. I'll give that try.

Regards,

BI.

[David Montiel Taboada]

Thank you, Farid. This is very helpful.

David 

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[Buhari Ibrahim]

Hi,

So I am trying to measure the evolution of the neck for the two spheres (for the 2D case for now); the reason I wanted to convert the .vtu files into hdf5. I was able to do the conversion, and I plotted the nodal coordinates for the order parameter c. Somehow, though, I feel like the density of the mesh at the interface is not representative of that from the simulation; in the simulation, the interface appears to be very thin but in the Matlab, it looks like a relatively thick zone with very fine mesh. I am not sure what the discrepancy is or could I just be misunderstanding the figures?

Also, from one of the video tutorials, I saw that Min. ref. level determines the coarseness of the mesh in a region whereas the Max. is fine meshes, but is there a way to define these regions? For example, if I only wanted the interface(or a portion of it thereof) to have a Ref. level of 6 and 2 in the bulk, how could I achieve that? Thank you very much.

Buhari.