Specifically for ultra-tight porous media, as in shale rock. I have noticed that an increasing pressure, decreasing velocity, has an effect on the dominance of a skin frictional drag force between the shale gas and rock grains. This has a substantial effect on the apparent gas permeability of the porous media.
Navid Kashaninejad
Dear Christian,
I have worked mainly on apparent slip in superhydrophobic microchannels. Could you explain more about your problem? To be honest, I did not understand your explanations under the title of this question.
Bests,
Navid
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Anton G. Skripkin
Dear Cristian,
We have seen the effect for low permeable rocks (permeability less than 1 mD). For the low delta pressure we observed a deviation from the linear Darcy low.
Anton
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