Tecplot post-processing on vtu format

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小黑

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Dec 12, 2024, 9:43:46 AM12/12/24
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Dear all,  

I hope this email finds you well.  

I am currently working on a simulation involving droplets and have encountered some challenges in postprocessing.  I noticed that bview3D does not seem to support the generation of velocity vector arrows. To improve postprocessing, I tried using the output_vtu_foreach.h file to export VTU files. However, when opening the files in Tecplot, I found only a single zone,is there any way to make different phase fields in different zones? Moreover, using contour visualization displays the entire domain instead of isolating just the droplet region.  
1one_zone.png     2.png
I also attempted to use isosurfaces to extract the droplet, but the resulting surface appears fragmented and lacks smoothness, unlike the seamless droplet surfaces rendered in bview. 
2-iso-surface.png4-bview.png
I would greatly appreciate your guidance on whether switching to another output format, using different postprocessing software, or modifying the current approach could help achieve a smoother droplet surface. Any advice or suggestions you could provide would be invaluable.  

Thank you very much for your time and assistance!  

Best regards,  
Tao Liangyu

Wojciech Aniszewski

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Dec 12, 2024, 10:20:12 AM12/12/24
to 小黑, basilisk-fr
1. Don't use Tecplot. It's proprietary, you can use the money for something else. Use Paraview (www.paraview.org).
2. Switch to the new version of output_vtu_foreach.h, namely, http://basilisk.fr/sandbox/acastillo/ contains Anders's new versions of these (in /output_fields).
3. You might get a smooth(er) surface for the drop, e.g. by using - -in Paraview - the 'isosurface' filter for the 'f' scalar, possibly testing values lower than 0.5 (the 'cell data to point data filter' may also be useful if 'isosurface' is inactive).
best
v
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Stephane Popinet

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Dec 12, 2024, 10:58:14 AM12/12/24
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