Hi all, I was thinking about how hard would it be to make MEEP use the grid with double (or quadruple) mesh density at some specified regions.
In 3D simulations, the computation time grows with 4th power of the density. This makes it very hard to precisely simulate fine metallic structures (or structures with high permittivity) if they have to be surrounded by enough free space. However, I do not know any principial reason why some region/chunk could not be defined twice as dense. At least two important tasks would need to be done: First, one has to "stitch" the fine-coarse boundaries so that no reflections occur. Second, the Courant criterion would require to use finer time steps in the region of fine grid. For twice as dense grid, one time step could just be interlaced between two other. What do you think about this feature? Maybe one time I will read the sources and try to write a proof of concept... Filip _______________________________________________ meep-discuss mailing list meep-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
