Allow setting grid dimensions and processor grid on command line #171
Description
Description
The runtime configuration is controlled by the input.x3d file which specifies case properties including the grid dimensions and the processor grid/decomposition. This makes scaling studies slightly awkward as a different input file is required for each grid refinement / decomposition requires its own input file.
Proposed solution
x3d2 should accept additional (optional) parameters for the grid and decomposition on the command line, e.g.
./xcompact3d input.x3d [px py pz] [nx ny nz]
if the decomposition or grid are specified on the commandline then these values in the input file should be ignored, otherwise they are taken from the input file.