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Solving multi domain (different diffusivity) Poisson-Nerst-Planck equation
Posted May 25, 2016, 11:14 p.m. EDT 2 Replies
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Hello all,
I am trying to solve multi domain (diffusivity is different from each region for c1, c2) Poisson-Nernst-Planck equation.
In order to do this, I am coupling electrostatic(es) module and Transport dilute species (tds) module.
In the case of dielectric constant, I can set different value by using 'from material'.
However, in the case of diffusivity, I cannot set each region different from each other.
I also tried using two (tds) module, however, I cannot converge them.
I always end up with the error 'Undefined variable.' and 'Failed to evaluate Jacobian of expression.'
Does anyone has good idea how to deal with this issue!?
I am trying to solve multi domain (diffusivity is different from each region for c1, c2) Poisson-Nernst-Planck equation.
In order to do this, I am coupling electrostatic(es) module and Transport dilute species (tds) module.
In the case of dielectric constant, I can set different value by using 'from material'.
However, in the case of diffusivity, I cannot set each region different from each other.
I also tried using two (tds) module, however, I cannot converge them.
I always end up with the error 'Undefined variable.' and 'Failed to evaluate Jacobian of expression.'
Does anyone has good idea how to deal with this issue!?
2 Replies Last Post May 26, 2016, 2:07 p.m. EDT
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Posted:
9 years ago
Under tds module, define another "Transport properties" item and assign the other D value there.
BR
Lasse
BR
Lasse
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Posted:
9 years ago
Thank you!
Now it works :)
Now it works :)