Experimental and Numerical Analysis of Flow Behavior for Reverse Circulation Drill Bit with Inserted Swirl Vanes

Table 2

Mesh independence results.

Number of mesh elements, million	Mass flow rate at inlet, g/s	Mass flow rate at annular outlet, , g/s	Mass flow rate at central outlet, g/s
0.38	20.5	14.90	35.40
0.46	20.5	15.15	35.65
0.68	20.5	14.11	34.61
0.85	20.5	14.56	35.06
1.09	20.5	14.58	35.08
1.23	20.5	14.49	34.99