Solving two coupled 1D governing equations

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Hello, I want to solve two coupled 1D governing equations for solute transport in a fracture-matrix system. The equations are written in the attached document. I know that this problem can be sovled by applying the interface of "transport of diluted species in porous media". However, I want to use the interface in "Mathematics" for a trial. The problem I met is that I do not know how to handle the coupling term in the equation in COMSOL. I think that I may treat it as a source term but this source term is dependent on location, which I have no idea how to implement in COMSOL. Could you help me how to deal with this issue? Many thanks in advance! Shuo Meng



1 Reply Last Post 2020年7月8日 GMT-4 上午9:12
Jeff Hiller COMSOL Employee

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Posted: 4 weeks ago 2020年7月8日 GMT-4 上午9:12
Updated: 4 weeks ago 2020年7月8日 GMT-4 上午9:14

Hello Shuo,

You can use a nonlocal coupling of the integration type defined at the point z=b. Applied to cpz, that will return .

Best,

Jeff

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Jeff Hiller
Hello Shuo, You can use a nonlocal coupling of the integration type defined at the point z=b. Applied to cpz, that will return \partial c_p / \partial z (z=b). Best, Jeff

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