Hi Berend, A detailed explanation of the finite difference scheme is given here :
http://en.wikipedia.org/wiki/Finite-difference_time-domain_method Thanks Rgds, Amit Berend van Wachem <berend at chalmers. se> To Sent by: petsc-users at mcs.anl.gov owner-petsc-users cc @mcs.anl.gov No Phone Info Subject Available Re: DA question 04/09/2008 02:59 PM Please respond to petsc-users at mcs.a nl.gov Dear Amit, Could you explain how the two grids are attached? I am using multiple DA's for multiple structured grids glued together. I've done the gluing with setting up various IS objects. From the multiple DA's, one global variable vector is formed. Is that what you are looking for? Best regards, Berend. Amit.Itagi at seagate.com wrote: > Hi, > > Is it possible to use DA to perform finite differences on two staggered > regular grids (as in the electromagnetic finite difference time domain > method) ? Surrounding nodes from one grid are used to update the value in > the dual grid. In addition, local manipulations need to be done on the > nodal values. > > Thanks > > Rgds, > Amit >
