the validity of the analysis of convective transport as
presented in Chapter 19.
variables: $C_{AL}^{in}$, inlet concentration of dissolved oxygen;
$C_{AL}$, concentration of dissolved oxygen in liquid at the tube
surface; D, outer diameter of tube; $v_{\infty}$, bulk velocity of
liquid; L, length of tube, long width of tank; W, width of
tank, short dimension; $k_L$, liquid film mass-transfer
coefficient; $N_t$, number of tubes.
b. What is the mass-transfer coefficient, $k_L$? Does the mass-
transfer process represent an external flow convection or
internal flow convection?
c. Based on your results for parts (a) and (b) above, estimate the
outlet concentration of dissolved oxygen. Based upon your
analysis, do you think that this mass-transfer device works
very well? Mention two doable options to increase $C_{AL}$-
Water + dissolved O? ($C_{AL}$)
100% O?(g)
4.0 atm
SIDE VIEW
$v_{\infty}$
Silicone tube
(D = 2.0 cm)
50 gmole/sec water
TOP VIEW
Parallel
tube array
L = 100 cm