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Anisotropic diffusion coefficient in cylindrical coordinates (2d model)
Posted 02.10.2017, 05:36 GMT-4 Fluid & Heat, Chemical, Bioengineering Version 5.2a 1 Reply
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Hi I am using a simple 2D model of a ring which couples Darcy's Law and Transport of diluted species and I have a problem with the diffusion coeffient. How could I define an anisotropic (diagonal) diffusion coefficient in cylindrical coordinates in a 2d model (no axisymmetric)? I have already defined a cylindrical system (and I select it in the physics), because I need the radial and circunferential directions for this coefficient but I think that comsol takes x and y directions and I don't get correct results. For example, the results taking an isotropic diffusion coefficient are correct. Can someone help me? I've attached some results of the model. Thank you in advance Best wishes Javier
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Hi I am using a simple 2D model of a ring which couples Darcys Law and Transport of diluted species and I have a problem with the diffusion coeffient. How could I define an anisotropic (diagonal) diffusion coefficient in cylindrical coordinates in a 2d model (no axisymmetric)? I have already defined a cylindrical system (and I select it in the physics), because I need the radial and circunferential directions for this coefficient but I think that comsol takes x and y directions and I dont get correct results. For example, the results taking an isotropic diffusion coefficient are correct. Can someone help me? I've attached some results of the model. Thank you in advance Best wishes Javier