Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Software » comp.soft-sys.matlab

Topic: System of 1D PDEs with coupled boundary conditions
Replies: 5   Last Post: Aug 23, 2013 5:26 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Luminita T.

Posts: 3
Registered: 8/22/13
System of 1D PDEs with coupled boundary conditions
Posted: Aug 22, 2013 10:15 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

I've have a system of 4 parabolic PDE with boundary conditions that I would like to integrate in time starting from initial conditions.

I've been trying to put the system into the pdepe() format, but it seems that I can't give coupled boundary conditions, in particular something of the form: a*DuDx(1) + b*DuDx(2) + c*DuDx(3) = 0.

As far as I could see from the help, q(x,t) needs to be specified as a vector-valued function that is element-wise multiplied with f(x,t,u,DuDx), which in my case is just DuDx. This does not allow to express linear combinations of elements of f() for a boundary condition.

If q(x,t) could be a matrix-valued function, then it could be done.
Is it possible to somehow specify coupled boundary conditions in pdepe() ?

Alternatively, I've been looking at the pdetool() for 2D spatial PDE. It seems a bit more complicated to handle and I'll have to put a bit of time into it. At this point, I can't say directly from the UserGuide (2. Setting up your PDE >>Types of Boundary Conditions) if it can handle the coupled boundary conditions. Any help figuring this out is much appreciated.




Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.