Fluid-rigid halfspaces
N S   
150 0
2
0 1500 0 0 0 1 0
0 1800000 0 0 0 18000 0
-25
-50 0 1 1
1500.01 1E8
1024 1 1024 
0 0.5 20 0.1
20 80 12 10
-500 0 15 100
30 60 3