Page 93 - Packed bed columns for absorption, desorption, rectification and direct heat transfer

Ag - value of 1 at zero °C
// G -dynamic viscosity of the gas phase, Pa.s;
fi L -dynamic viscosity of the liquid phase, Pa.s;
2
v G - gas kinematic viscosity, m /s;
2
v L - liquid phase kinematic viscosity, m /s;
3
p - density in kg/m ;
3
PG- -gas density in kg/m ;
3
PL- liquid density in kg/m ;
0 = div w
0 D - equivalent diffusion time, s;
0 g - exposure time, s;
0 r - time from the moment of appearance of the element on the surface, s;
0 g - angle of wettability;
t - time in s;
er - surface tension, N/m;
a
LS" boundary surface tension between the liquid and the solid phase, N/m;
a LG - boundary surface tension between the liquid and the gas phase, N/m;
°SG' boundary surface tension between the solid and the gas phase, N/m;
AP 0,d he 2
iff = —-—=—z- -dimensionless pressure drop, often called Euler number (Eu);
H.p G.w 0

if/ f = — V^- = —£-. \2-G- - dimensionless flow parameter;
w o\p G G g] p t
2
V - Laplace operator.

• References

1. F. Notaro, AICHE Journal, 47, No 5 (2001) 966.
2. G. Lunge, Handbuch der Schwefelsacurcfebrikation, Zweite Band. Drack und Verlag ¥on
Friedr. Viewe^Sohn, Braunschweig, S. 81S3.
3. V. V. Kaferov, Bases of mass transfer, Visshaia stola, Moscow, 1962 (in Russian).
4. R. F. Strigle, Random packings and packings towers, Gulf publishing Company, Houston,
London, Paris, Tokyo. 1987.
5. W. M. Ramm, Gas absorption, Himia, Moskwa, 1966 (in Russian).
6. H Brauer, Grundlagen der Einphasen-und MehrphsenstrOmungen, Verlag Sauerlflnder
Aarau und Frankfurt am Main, 1971.