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Additional Variable BC

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Old   May 22, 2010, 11:33
Default Additional Variable BC
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Eli
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Hi There
How can I set such a Boundary condition on wall for an "Additional variable" C:

K \partial C/\partial x= H (C-C0)


K and H are constants.

It's like heat transfer coefficient for wall but the variable is C.
Thank you so much
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