Nomenclature
FS F-factor [m/s
(kg/m3)0.5]
Lw Weir length [m]
P Pressure [Pa]
UG,in Hole gas velocity [m/s]
UG Gas phase superficial velocity based on the
bubbling area [m/s]
UT Droplet terminal velocity (m/s)
g Gravitational acceleration [~ 9.8
m/s2]
MG, L Interphase momentum transfer
[kg/m2s2]
Q L Liquid volumetric flowrate
[1/m3s]
C D Drag coefficient [-]
VSlip Slip velocity [m/s]
hc Effective clear liquid height [m]
VL , \(u_{L}\) Liquid velocity [m/s]
VG , \(u_{G}\) Gas velocity [m/s]
hw Height of weir [m]
AB Bubble area of tray [m2]
AH Total area of holes [m2]
R Radius of the tray (m)
SGL Rate of mass transfer from gas phase to
liquid phase [kg/m3s]
SLG Rate of mass transfer from liquid phase to
gas phase [kg/m3s]
z Coordinate position in the transverse direction to liquid flow
across tray [m]
x Coordinate position in the direction of liquid flow along tray
[m]
x /L Dimensionless coordinate position along tray [–]
y Coordinate position in the direction of vapor flow across tray
[m]
z /R Dimensionless coordinate position across tray [–]