max_grid_size with mesh refinment

[pordyna]

Hi!,
I see in the Amrex documentation that it is possible to set max_grid_size (and max_grid_size_x ...) for each refinement level. But not according to WarpX docs. Is it still possible? And if so, is there a way to do it with picmi?

[roelof-groenewald]

Hi @pordyna. You can set the max_grid_size through picmi by passing the argument warpx_max_grid_size=... to the grid initialization (ex. Cartesian3DGrid(..., warpx_max_grid_size=128)). You can also pass warpx_max_grid_size_x and warpx_max_grid_size_y.
I've only used it with a single level so I'm not sure if it will work to pass a list of values for each refinement level. If you try it and it doesn't work, please let us know so we can extend the functionality.