Initial Condition
 

Help!! I'm trying to solve the electric field (DC) in a straight channel. I guess the final answer is constant gradient distribution.

Now, I don't give any initial value for electric field. After five days, I still can't get the distribution that I want.

So, I think that if I can give the constant gradient distribution for electric field. I can get better result.

But I don't know how to set the constant gradient distribution for electric field!!

Maybe there is something wrong with my treatment with electric field, I can't get the convergence solution.

Cheers,