[Getdp] Need some help
Christophe Geuzaine
c.geuzaine at ulg.ac.be
Wed Dec 15 03:22:00 CET 2004
matthieu.guillon wrote:
> Dear Christophe,
>
> I am a new user of GetDP, and I need to compute the propagation of
> an acoustic wave inside a horn (with a non constant cross section along
> the propagation axis).
> The equation looks like this:
>
> d²P dP d(ln(S))
> ----- - ----- * ----------- + k²*P = f
> dx² dx dx
>
> With mixed Derichlet and Neumann boundary conditions (Robin BC).
>
> Please could you show me how can I write this in the right procedure ?
>
Have a look at http://geuz.org/getdp/wiki/MicroWaveElectricField
(username: getdp, password: wiki). The formulation you're looking for is
similar to MW_e_2D. (MW_e_2D is actually for the electric field in a 2D
electromagnetic wave problem, but the equations are the same.)
Good luck,
Christophe
--
Christophe Geuzaine
Applied and Computational Mathematics, Caltech
geuzaine at acm.caltech.edu - http://geuz.org