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How to add coupled boundary condition ?

Posted Sep 2, 2020, 9:43 p.m. EDT Structural & Acoustics, General, Chemical Reaction Engineering 0 Replies

亚飞 王
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Hi

I am working on a diffusion/stress coupled problem by using species transport/solid mechanics modulues in COMSOL.

I tried to add a concentration BC, which is a function of the hydrostatic stress (hds):

c=f(hds, P)------------------------------(1)

hds is defined in the variable, which equals to the average of three principal stresses and is dependent on the position. P is the gas pressure, which is dependent on the species flux. Everything is fine when the stress effect is not included:

c=f(P)------------------------------------(2)

But the software shutdown immediately when the stress effect is added, i.e. equation (1).

Does anyone know the solution ？

Much appreciated !

Yafei

0 Replies Last Post Sep 2, 2020, 9:43 p.m. EDT
COMSOL Moderator

Hello 亚飞 王

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