Dear Prof. Johnson: Thanks a lot for the hint. I should read the manual more carefully. It is great to use such unique feature solve a otherwise huge problem.
Many thanks!! Puck On Wed, Mar 12, 2008 at 3:24 PM, Steven G. Johnson <[EMAIL PROTECTED]> wrote: > > On Mar 12, 2008, at 11:50 AM, Puck Ja wrote: > > > Dear Meep users: > > > > The ring_cyl.ctl example shows how to use cylindrical symmetry to > > reduce a 2D problem into a 1D one. The source is a Ez diople. > > However, if I changed it to Ex (actually Er in the cylindrical > > coord.), MEEP will give me an error: > > > > meep: Invalid fields::loop_in_chunks grid type ex for dimensions > > Cylindrical > > > > Same thing to the Ey (or E_phi) source. > > You have to specify it as Er and Ep for a source in the radial or the > phi direction respectively. This is *not* the same as Ex, because an > Er source in cylindrical coordinates is a ring of dipols pointing > radially outwards (or inwards), not just in the x direction. > > Regards, > Steven G. Johnson > > _______________________________________________ > meep-discuss mailing list > [email protected] > http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss >
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