The Math Forum

Search All of the Math Forum:

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

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

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: measured boundary conditions with pde toolbox
Replies: 17   Last Post: Apr 8, 2014 6:00 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Bruno Luong

Posts: 9,822
Registered: 7/26/08
Re: measured boundary conditions with pde toolbox
Posted: Aug 5, 2009 6:21 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

"Doug " <> wrote in message <h5cmv4$lbc$>...
> Has anybody tried using the pde toolbox with boundary conditions taken from experimental measurements (ie, not a formula)?
> I see that assempde will take as its input either a boundary condition matrix or a boundary M-file, but both seem to give boundary conditions by specifying a simple formula (like x.^2+y.^2, from the example in the help files). I want to solve Poisson's equation using actual experimental data for the Neumann boundary conditions. It would seem reasonable to provide a matrix similar in form to the edge matrix "e", but containing local values of the Neumann boundary condition. Can it be done?
> Thanks in advance from a lowly experimentalist to all you pde gurus!

Unless if you refer to Dirac Neumann bc, the local values Neumann's bc does not make sense. It must be something you can *apply* on another function defined on the boundary. Specifically, mathematician like to refer it as continuous linear application on the fractional Sobolev H^{1/2} space; or even more barbaric: the "H^{-1/2} space". The later does not have defined local value, unfortunately.


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

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2018. All Rights Reserved.