Df |
father-bubble diameter (m) |
Dm |
mother-bubble diameter (m) |
Ds |
satellite bubble diameter (m) |
Dsa |
average of satellite bubble diameter
(m) |
g |
acceleration due to gravity
(m/s2) |
Lb |
capillary length (m) |
Ohm
|
Ohnesorge number |
Q |
gas flow rate (m3/s) |
R0
|
inner radius of tube (m) |
Rm |
mother-bubble radius (m) |
t |
time (s) |
T |
father-bubble cycle period (s) |
tp |
partial coalescence time (s) |
u |
average gas injection speed (m/s) |
We |
Weber number |
Greek letters |
Greek
letters |
μ |
Liquid dynamic viscosity (Pa s) |
ρ |
density (kg/m3) |
σ |
surface tension coefficient (N/m) |
τσ |
capillary inertial time (s) |