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Re: [Question #703836]: How desiredPorosity works?

To: yade-users@xxxxxxxxxxxxxxxxxxx
From: Robert Caulk <question703836@xxxxxxxxxxxxxxxxxxxxx>
Date: Wed, 16 Nov 2022 10:25:36 -0000
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Question #703836 on Yade changed:
https://answers.launchpad.net/yade/+question/703836

    Status: Open => Answered

Robert Caulk proposed the following answer:
Hello,

By default, `FlowEngine` computes the volume of water in a cell to be
equivalent to the full tetrahedron less the sphere fractions.
`desiredPorosity` allows the user to reduce the total volume of water in
the specimen by multiplying the default cell volumes by a
volumeCorrection factor:

volumeCorrection = desiredPorosity/actualPorosity
cell_volume = volume * volumeCorrection

This has an effect on compressible fluid simulations and heat diffusion.

It does not change the structural sphere packing.

Cheers,

Robert

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