Single-phase

Two-phase

v_n (m/s)

P/H (Pa/m)^*

s (Pa/m)

n

R²

P/H (Pa/m)^*

s (Pa/m)

n

R²

14

−33.8 ± 5.4

2.6

22

0.894

−48.0 ± 6.7

3.2

18

0.935

22

−78.7 ± 4.5

2.2

24

0.984

−95.4 ± 6.3

3.0

24

0.979

29.5

−131.0 ± 7.9

3.8

24

0.982

−149.4 ± 8.8

4.3

30

0.977

38

−199.8 ± 15.0

7.2

22

0.975

−220.2 ± 16.5

7.9

23

0.974