Problem related to "Calcite Porosity Change"

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1

Hello,

I am working with porosity change in domain and followed the benchmark 'Calcite porosity change and in the project file I found the solid volume fraction of calcite is '2.446e-6.
How to determine this fraction value for any solid?

Please let me know the answer and it will help me a lot.

Thanks in advance.

Sincerely,
Md Mahmudul Hassan

2

I’m not very familiar with those chemical simulations, but to me it seems that this value specifies the (initial?) composition (of the chemically “active” parts) of the rock. So I’d say it depends on your simulation scenario what that value is.

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3

Dear Sir,

Thank you so much for your suggestions. I understood the idea but can’t calculate the value.
just like the benchmark example (calcite Dissolution-precipitation) problem it provided hydraulic parameters: molar volume, porosity, permeability and domain size. By using those informaitons I tried to calculate the value but completely failed although it looks simple.

I really need some expert’s suggestion to calculate the value for my problem.

Sincerely,
Md Mahmudul Hassan

4

Sorry for the late response,

you cannot compute the calcite volume fraction from its molar volume, porosity, permeability and domain size. It depends on the mineral composition.

You have to get it from the geological data you are using. Either directly as a volume fraction or as something similar, e.g. concentration = mole per volume and convert that to a volume fraction.

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5

I understood the idea.
Thank you so much for your respond sir.