(Deleted) drift-diffusion example in dolfin


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9 months ago by
I am trying to solve the following coupled system of non-linear Poisson's equations in dolfin:

\[
\begin{gather}
-\nabla \cdot (\epsilon V_t \nabla u ) - \rho = 0\\
\nabla \cdot J_n - R = 0 \\
\nabla \cdot J_p + R = 0 \\
V_t = kT/q \\
n = n_i \exp(u-u_n) \\
p = n_i \exp(u_p-u) \\
\rho = p+d-n \\
J_n = -\mu_n n V_t \nabla u_n \\
J_p = -\mu_p p V_t \nabla u_p \\
R = B(np-n_i^2) + (np-n_i^2)/(\tau_n(p+n_i) + \tau_p(n+n_i))
\end{gather}
\]
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