#Pressure convergence=1e-7 and 200 iterations (1s of physical time)
#cores		wall_clock[s]	wall_clock[s]/iteration 	Parallel Efficiency [%]		Cells/cores
  48		1660.8		8.304				100				1179648
  96		 837.9		4.189				 99				 589824
 192		 434.1		2.171				 96				 294912
 384		 226.1		1.130				 92				 147456
 768		 117.8		0.589				 88				  73728
1536		  62.8		0.314				 83				  36864
3072		  34.5		0.173				 75				  18432
6144		  28.9		0.145				 45				   9216