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Weak contribution for phase field- sign covention

Posted 30.05.2017, 23:07 GMT-4 0 Replies

Jayden Tan
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If I understand correctly, weak contribution is the term that can be added in COMSOL for additional source term in governing equation. However, I do not know if this is being added on left or right hand side of the equation (This determine the sign convention of my weak contribution).

Example of phase field weak expression is: test(psi)*phi_source which is source term of level set equation.

Does anyone know if my source term is on right hand side, would the weak expression be +ve or -ve sign? Really appreciate if you could help if you done this before, particularly in phase field.
0 Replies Last Post 30.05.2017, 23:07 GMT-4
COMSOL Moderator

Hello Jayden Tan

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