Thread Subject: Basic PDE Boundary condition

Hi~~

I could not find any source for my question.
Left boundary condition is du/dx=0
Right boundary condition is du/dx=-1.5

function [pl,ql,pr,qr] = pdex1bc (xl,ul,xr,ur,t);
pl = 0;
ql = 1;
pr =?
qr = ?

What do I have to write to each term of pr and qr?

Thank you in adavance.

> Hi~~
>
> I could not find any source for my question.
> Left boundary condition is du/dx=0
> Right boundary condition is du/dx=-1.5
>
> function [pl,ql,pr,qr] = pdex1bc (xl,ul,xr,ur,t);
> pl = 0;
> ql = 1;
> pr =?
> qr = ?
>
> What do I have to write to each term of pr and qr?
>
> Thank you in adavance.

It depends on how you defined f the pde-definition.
If f = DuDx, then you have to set
pl = 0, ql = 1, pr = 1.5 , qr = 1.

Best wishes
Torsten.