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Topic: PDE Toolbox
Replies: 6   Last Post: Jan 4, 2012 12:09 PM

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srao Rao

Posts: 29
Registered: 7/16/10
Re: PDE Toolbox
Posted: Jan 4, 2012 12:09 PM
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Torsten <Torsten.Hennig@umsicht.fraunhofer.de> wrote in message <22a8d7f6-e226-4da9-9e4e-f1a63190490d@z17g2000vbe.googlegroups.com>...
> On 4 Jan., 13:22, "Sashankh Rao" <sashankh...@gmail.com> wrote:
> > Torsten <Torsten.Hen...@umsicht.fraunhofer.de> wrote in message <c8f3f432-0339-4208-9ea7-13f72dcbe...@z25g2000vbs.googlegroups.com>...
> > > On 4 Jan., 07:23, "Sashankh Rao" <sashankh...@gmail.com> wrote:
> > > > I am using the pde toolbox to solve elliptic pdes for a temperature distribution. I need to fix the temperature at certain nodes and use them as boundary conditions. However, I am not able to do this using the toolbox. Is there any way of specifying the temperature at a given node using the command prompt perhaps? Thanks
> >
> > > What about making small circular holes in the geometry with a fixed
> > > temperature at the
> > > circular boundary for the positions where you want to fix the
> > > temperature ?
> > > This will waste some grid cells to mesh the circles adequately, but it
> > > does what you want.

> >
> > > Best wishes
> > > Torsten.

> >
> > Hi Torsten,
> >
> > Thanks for your suggestion. I actually have two domains separated by an interface. I solve for temperature in the first domain and use the interface values as boundary conditions to solve for temperature in the second domain. Hence I will have multiple nodes at which the temperature must be specified and need to automate the process. Further the temperature at each node is not the same on the interface.
> >
> > I agree with your idea of creating circular holes. That should work out. For this case I was wondering if there could be any other way of specifying the temperature? Thank you for your time.
> >
> > Sashankh

>
> As far as I know, the PDE toolbox can not handle interface problems.
> Interface conditions are much different from external boundary
> conditions
> since they couple solution variables on both sides of the interface -
> in your case most probably temperature and heat flux.
>
> Best wishes
> Torsten.


Thanks for your help. I guess I will have to write the code myself.



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