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Need to do integration in "r" direction
Posted Jul 10, 2012, 1:00 p.m. EDT Version 4.3 0 Replies
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I am trying to integrate particle flux around a surface of the sphere. So I am using surface integration from derived values. As you know the default coordinates in COMSOL is Cartesian. However, I need to do this integration on spherical coordinates (r, theta, phi). So I added the sys2( spherical coordinates) from definition. I previously run my program with Cartesian coordinates so everything are in x,y, z direction. Now that I added the new coordinates(spherical). How can I implement it in my results? I need to integrate particle flux on r direction over the entire range of theta and phi. But I can't find the concentration gradient in r direction. The only direction available are x,y, z. Please help me to use this new coordinates that I defined in my results. I really appreciate all the help that you guys give to me.
Thanks,
Negin
Hello Negin Kananizadeh
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