EvanescentBoundary2D pb in inner and outer ring
The if(i == 0){ and if(i == nr -1){ be condition by grid().first() and grid.last() ?
Do we really want to apply them in inner rings ?
The if(i == 0){ and if(i == nr -1){ be condition by grid().first() and grid.last() ?
Do we really want to apply them in inner rings ?