[Getdp] absorbing boundary condition
Christophe Geuzaine
Christophe.Geuzaine at ulg.ac.be
Thu Jul 26 20:07:08 CEST 2001
Lin Ji wrote:
>
> Hi, Christophe,
> Thank you for your response. For the following rectangular region,
> 0<x<0.5, -0.5<y<0.5
> if we have a source at x = 0, then the 3rd order absorbing boundary condition
> on the other three sides read
>
> 1. x = 0.5 : -u_{xtt} - u_{ttt} + (1/4)u_{xyy} + (3/4)u_{tyy} = 0
>
> 2. y = -0.5 : u_{ytt} - u_{ttt} + (1/4)u_{yxx} + (3/4)u_{txx} = 0
>
> 3. y = 0.5 : -u_{ytt} - u_{ttt} - (1/4)u_{yxx} + (3/4)u_{txx} = 0
>
What's the meaning of the subscripts?
--
Christophe Geuzaine
Tel: 32 (0) 4 366 37 10 http://geuz.org
Fax: 32 (0) 4 366 29 10 mailto:Christophe.Geuzaine at ulg.ac.be