Chemical potential calcluted with Split formulation Cahn-Hilliard Kernel #28343
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ZhouXD1989
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Q&A Modules: Phase field
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Hello MOOSE members,
I am using the Split formulation Cahn-Hilliard Kernel to simulate coupled chemo-mechanical diffusing problems (with kappa=0) with additional eigenstrains, e.g. dislocations.
When I consider the additional eigenstrain, the calculated chemical potential 'w' is quite different from the material properties directly calculated from mu = dF/dc (saved in axuvariable 'mu' through MaterialRealAux), as shown in the following figure. If there is no additional eigenstrain, the solutions of 'w' and 'mu' are the same.
So what could be the reason for this difference?
Following is my input file:
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