(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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