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Zhou Lang

How to calculate the mechanical dispersion

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Hello. I am inquiring about how to know the mechanical dispersion in the PetraSim.

When I input the diffusion coefficient and tortuosity/porosity, I just can obtain the so-called effective diffusion coefficient. If we want to get the dispersion coefficient, we must know the mechanical dispersion coefficient (dispersion = effective diffusion + mechanical dispersion). Then we can apply the dispersion coefficient to the advection-dispersion equation. So how can we get the mechanical dispersion coefficient?

Thank you.

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