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general pde mode, spherical coordinates
Posted 2011年3月10日 GMT-5 15:52 6 Replies
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I want to solve a differential equation in spherical coordinates (just “R” component dependent)
By “General PDE mode” (comsol3.4).
But there is no default spherical coordinates in the comsol .
Now how can I resolve this problem?
The simulation geometry is as following:
A----------------------------------------B
Regards
parviz
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define the coordinate yourself, see the KB (and other treads on the FORUM)
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Good luck
Ivar
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but i can not find the KB.
can i pre-arrenge the my equation and so, use the cartesian coordinates?
regards
parviz
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sorry, KB is the sort for the official Knowledge Base of COMSOL
www.comsol.eu/support/knowledgebase/browse/900/
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Good luck
Ivar
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regards
parviz
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I am facing the same problem you had few years ago. Could you please tell me how you solved this issue?
I have to model mass transport in spherical coordinates.
I cannot access to KB that's why I am asking.
Thanks in advance
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you can define the spherical coordinate system, andthen use the references of the "user coordinate" system "sys2..." to define or transform your variable (oth ways actually)
But COMSOL by default work in cartesian coordiantes so you need to map ack and perhaps, for the results forward ;)
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Good luck
Ivar