The OPAL Discussion Forum

["Dragos Constantin" <dragos.constantin AT gmail.com>]

Hi All,

This issue relates to the relationship between the number of macroparticles
and the grid size. (I know that at least the number of macroparticles must be
bigger than the grid size.)

When I setup a simulation model I use a small number of macroparticles with a
relattively small grid size. For example:

REAL N_PARTICLES = 1e4;

REAL MXX = 2^3;
REAL MYY = 2^3;
REAL MTT = 2^7;

So in this case I have ~1.22 macroparticles per grid voxel. I definitely want
to increase the number of particles, the question is do I have to increase the
grid resolution as well? If yes, what is a good choice for the number of
macroparticles/grid voxel?

Thanks,
Dragos