Re: partial differential
- To: mathgroup at smc.vnet.net
- Subject: [mg44797] Re: partial differential
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Thu, 27 Nov 2003 11:38:21 -0500 (EST)
- Organization: Universitaet Leipzig
- References: <bpurea$o9r$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
- Sender: owner-wri-mathgroup at wolfram.com
Hi,
without \[Alpha], diff,nstart .. and the other
constants we can not
tell you what's wrong. At least an error
message would help.
Regards
Jens
Uli Wuerfel wrote:
>
> Hi experts,
> I have problems with solving stuff like
>
> \!\(pd = \[PartialD]\_t\
> n[x, t] == \(-dif\)\ \[PartialD]\_\(x, x\)\ n[x, t] +
> int\ Exp[\(-\[Alpha]\)\ x] - rek\ n[x, t]\)
>
> ( where dif, int, alpha and rek are constants )
>
> I tried it via
>
> \!\(lsg =
> NDSolve[{pd, n[x, 0] == nstart,
> n[0, t] == nstart, \((\[PartialD]\_x\ n[x, t] /. x ->
> thickn)\) == 0},
> n, {x, 0, thickn}, {t, 0, 2}]\)
>
> ( again nstart and thickn are constants )
>
> but could not make it...
>
> Have any advice??
> Thank you,
> Uli