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Immersed boundary solver & smooth VOF initialization in OpenFOAM

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Old   March 19, 2020, 10:11
Smile Immersed boundary solver & smooth VOF initialization in OpenFOAM
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Chenguang Zhang
Join Date: Jul 2012
Location: Baton Rouge Louisiana
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Hi Community, I want to share my immersed boundary solver "sdfibm" (https://github.com/ChenguangZhang/sdfibm), I will omit the technical details (in paper) and show you what it can do. See the included example of the sedimentation of 100 particles (video version at https://www.youtube.com/watch?v=C6U9X9zatz8).



The code only depends on OpenFOAM, and is trivial to install and use---both as research and teaching tools, please please star the repository if you find it useful ^ ^

It also contains a tool to smoothly---which also means accurately---initialize VOF phase fractions in OpenFOAM, which works with arbitrary polyhedron meshes. See example initializations:



The tool is under the tool_vof folder, with the above example included.

Why smooth field: because simply setting fraction to 0-1 (as by setFields in OpenFOAM) gives a staircase or zig-zag interface. The resultant capillary waves are annoying and pollute the simulation. See comparison below (left my tool, right setFields)

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developing new solver, immersed boudanry, vof model

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