On the apparent permeability of porous media in rarefied gas flows

What is it about?

This paper quanfied rarefied gas flows in porous media. For the first time, we have properly explained the Klinkenberg's experiment on the apparent permeability conducted in 1941.

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Why is it important?

Better understanding of shale gas flows will help to reduce the number of drilling wells to achieve the same production role, thus saving significant cost of fracking and the associated environmental impact.