Confining pressure and Back Pressure

mortezahdr · January 11, 2022, 22:51

Dear Fellas,

I am trying to simulate fluid flow through rough-walled microfractures, based on experimental data and compare the corresponding results with those of experiments.
In the experiments’ description, it is mentioned that certain values are set for confining pressure and constant back pressure through the test. Considering a computational domain based on a microfracture formed between two rough surfaces, which I have reconstructed based on experimental measurements, how can I apply the confining and back pressure in a CFD simulation in OpenFOAM?

Thank you.

JulioPieri · January 14, 2022, 14:54

Not familiar with this area, but isn't back pressure simply your outlet pressure? Your confining pressure would be "the pressure exerted by the walls on the fluid", maybe you could use it as internalField value.

January 11, 2022, 22:51	Confining pressure and Back Pressure	#1
mortezahdr Member Morteza Join Date: Jan 2018 Posts: 30 Rep Power: 8	Dear Fellas, I am trying to simulate fluid flow through rough-walled microfractures, based on experimental data and compare the corresponding results with those of experiments. In the experiments’ description, it is mentioned that certain values are set for confining pressure and constant back pressure through the test. Considering a computational domain based on a microfracture formed between two rough surfaces, which I have reconstructed based on experimental measurements, how can I apply the confining and back pressure in a CFD simulation in OpenFOAM? Thank you.

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January 14, 2022, 14:54		#2
JulioPieri Senior Member Julio Pieri Join Date: Sep 2017 Posts: 109 Rep Power: 9	Not familiar with this area, but isn't back pressure simply your outlet pressure? Your confining pressure would be "the pressure exerted by the walls on the fluid", maybe you could use it as internalField value.