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Using geometry values in physics boundary conditions
Posted 04.02.2013, 18:06 GMT-5 Geometry, Modeling Tools & Definitions, Parameters, Variables, & Functions Version 4.0a 2 Replies
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Hi all,
I have tried to look around but have not figured out a way to do this. I would like to use a geometry value (i.e. the surface area of an ellipsoid) to define the flux boundary condition through that ellipsoid. For simple structures I can calculate this by hand but it never seems to come out right in comsol in the results... it would be nice to do this within comsol for when the geometry gets more complicated and to eliminate this error. More specifically, I have a total flux in number of molecules per second, but the boundary condition in comsol only accepts mol/m^2s. If my flux is say, 500 molecules per second, I would like to be able to put say '500 / boundary area' as my flux. Suggestions?
Thanks,
I have tried to look around but have not figured out a way to do this. I would like to use a geometry value (i.e. the surface area of an ellipsoid) to define the flux boundary condition through that ellipsoid. For simple structures I can calculate this by hand but it never seems to come out right in comsol in the results... it would be nice to do this within comsol for when the geometry gets more complicated and to eliminate this error. More specifically, I have a total flux in number of molecules per second, but the boundary condition in comsol only accepts mol/m^2s. If my flux is say, 500 molecules per second, I would like to be able to put say '500 / boundary area' as my flux. Suggestions?
Thanks,
2 Replies Last Post 04.02.2013, 19:37 GMT-5