# Homework Help: Solving simultaneous PDEs using FEMLAB

1. Jun 29, 2007

### ukamle

1. The problem statement, all variables and given/known data
I want to solve the following two interlinked (simultaneous) Partial Differential Equations using FEMLAB. The equations are:
$$$\frac{\partial^2 \psi}{\partial^2 x} = - \frac{q}{\epsilon} p$ $p \frac{\partial^2 \psi}{\partial^2 x} + \frac{\partial \psi}{\partial x} . \frac{\partial p}{\partial x} = 0$ q = 1.6e-19 $\epsilon = 3*8.854e-12$$$

2. Relevant equations
How to Solve using FEMLAB?? or any PDE solver...

3. The attempt at a solution
confused