Initial volume of solution and hydrostatic pressure in each loading pool.

a. Hydrostatic pressure was calculated using the formula P = ρgh (ρ-the density of the solution, considered close to water; g-gravitational acceleration, 9.8 m/s2; h-liquid height in each pool). Liquid height in each pool was calculated using the formula V = πr2h (V refers to volume of solution added in each pool, diameter of each pool was 2 mm).b. ΔH/ΔP refers to liquid height/hydrostatic pressure differences between Pool A and B/C.c. Pool A, B and C were corresponded to the loading pools labeled in Fig 1C.Initial volume of solution and hydrostatic pressure in each loading pool.