[immortality]

Hi
1)what are the rules for dividing the solution domain in decomposePar.
for example how to find out for 4 cores in 2D flow which of (4 1 1) (1 4 1) or (2 2 1) is more suitable?

2)if the flow in a region has not any complexity but in other regions has high complexity then that core doesn't participate in other core analyzing and work less than them?
like in the case of shock tube, when moving shock has not reached to some areas there is nothing to solve, in these cases one core sustain near whole the work?how can change this situation?
3)I think the line between cores should be low enough to not allow high interactions between them,am I right?