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How to set floating-potential boundary condition and non-uniform initial conditions?
Posted Jan 31, 2012, 5:58 p.m. EST Version 4.2 0 Replies
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Here is the situation that I need some advice on:
1. In the 2D-axisymmetric model I need to have a surface with a floating-potential boundary condition and specified with the source current (total current as in v3.2) flowing through the surface, rather than a spatially-constant current density. How do I set the floating-potential boundary condition in v4.2?
2. One of the boundary surface has a capacitive layer, which I plan to set using distributed impedance boundary condition. Is it possible to have the reference potential set as a time-dependent variable that updates with simulation time? In that case, I can set the boundary in 1 as a fixed potential. Also, is it possible to set the electrical conductivity of the impedance as a surface-voltage-dependent variable (simulating chemical reactions)? I might need to the conductivity to change with surface potentials in later simulations.
3. The initial value of the potential at t=0+ in the simulation space has an non-uniform analytical solution, which I would like to calculate outside COMSOL, store and then apply to the model. How do I set a non-uniform initial potential value?
Thanks
Hello Boshuo
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