Is any package of CFD to simulate the hydrodynamic behaviour?

Specific Domains Biology, Health, and Medicine
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Is any package to simulate the hydrodynamic behaviour of a bioreactor with a impeller?

PS Something like ANSYS Fluent/THINK Fluid Dynamix.

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There is a bunch of PDF packages
https://github.com/JuliaPDE/SurveyofPDEPackages

But I’m not aware of any tailored CFD packages.

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Nothing as mature as the commercial CFD software you mention, but perhaps this is interesting to you:
https://github.com/weymouth/WaterLily

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There is also: https://github.com/JuliaIBPM/ViscousFlow.jl although, I do not know if that applies to the bioreactor that is mentioned…

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This one can do magic:
https://github.com/CliMA/Oceananigans.jl

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if one knows how… Is there any documentation in general (beside the examples), and how to define the border conditions specifically?

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Yes, you should see its documentation site. There is also specific Boundary conditions page.

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Zlatan, thank you!

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