Handbook of Solvents - George Wypych - ChemTech - Ventech!

7.3 Drying of coated film 415
Figure 7.3.32. Schematic diagram of airflow system to a zone. [After reference 30].
7.3.5 NOMENCLATURE
B Nozzle slot width
b Thickness [m]
C Concentration of solvent at a gas phase [kg/m 3 ]
CP Specific heat [J/kg]
E Young’s modulus
ER Evaporation rate of solvent [kg/min]
F measured force of peeling
f Fraction open area (B/LT) fO [60 + 4(H/2B - 2) 2 ] -1/2
G Mass flow rate of dry air [kg/sec]
h Heat transfer coefficient [J/m 2 s o C]
H Nozzle to coating surface distance
k Heat conductivity [J/m o C]
km Mass transfer coefficient [m/sec]
LT Nozzle spacing
P Vapor pressure [atm]
Q Volumetric flow rate of air [m 3 /min]
R Gas constant
T Temperature [ o C]
t Time [s]
tC Thickness of sample
UR Recoverable strain energy per unit volume stored in the coating
V Line speed [m/min]
W Solvent coating amount [kg/m 2 ]
w Velocity of air at the nozzle exit [m/sec]
WD Coating width [m]
z Volume fraction of component [-]
Dimensionless Numbers
Sh Sherwood number