How desiredPorosity works?

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

Thank you Robert,

So, for the parts that got "corrected" (actualPorosity - desiredPorosity), are their thermal and mechanical properties replaced as particles'? In the THM process, are these portion act like solid or pore fluid?

In short, am I correct to assume that the particles got manually swelled up to meet the desiredPorosity?

Thank you again.

Best
Jiannan

Hello,

>In short, am I correct to assume that the particles got manually swelled up to meet the desiredPorosity?
>are their thermal and mechanical properties replaced as particles'?

No, the structural packing is not changed by desiredPorosity. Particle count remains unchanged.

Cheers,

Robert

Hello Robert,

Thank you again for the answer, forgive my slow comprehensiveness: so what happen to the volume that are volume * (actualPorosity -desiredPorosity)? Do they have the physical properties of pore fluid only do not flow? Or something else? Thank you.

Best regards
Jiannan

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