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How to find partial derivative of dependent variable at one point

Posted Oct 29, 2014, 6:33 a.m. EDT Studies & Solvers Version 3.5a, Version 4.3 1 Reply

Vibudh Agrawal
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I am using diffusion time dependent model with two dependent variables cp and cb.
My equation of cb requires me to input "partial derivative of cp at x=0"

i,e cb=k*pd(cp,x)|(at x=0)

k is constant.

And in calculation of cp my boundary conditions for it are at x=0 and L cp=cb. There is no cb in the differential equation of cp except for boundary conditions.

How am I supposed to calculate partial derivative of cp at x=0?
Please Help
Thank You
1 Reply Last Post May 28, 2016, 1:48 p.m. EDT
COMSOL Moderator

Hello Vibudh Agrawal

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Telma Silva
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Posted: 8 years ago May 28, 2016, 1:48 p.m. EDT
I'm interested in this answer as well.

T.
I'm interested in this answer as well. T.

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