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Fuel Cells
book

Fuel Cells

by Shripad T. Revankar, Pradip Majumdar
May 2014
Beginner to intermediate content levelBeginner to intermediate
748 pages
23h 13m
English
CRC Press
Content preview from Fuel Cells
265Heat and Mass Transfer in Fuel Cells
For slip condition at the interface of the diffusing particles and the liquid
medium, the force over the particles is given as
F
b
= 4πμ
b
U
a
R
a
, (6.116)
and the corresponding expression for diffusivity is given as
D
kT
R
ab
ba
=
B
4πµ
.
(6.117)
Another empirical correlation based on the Stokes–Einstein equation for
low concentration of species i in liquid medium j is given by Wilke and
Chang (Sherwood et al., 1975),
D
MT
v
ab
bb
ba
=
×
74 10
81
2
06
.()
/
.
ψ
µ
(6.118)
where
v
a
= molar volume of solute at normal boiling point (cm
3
/mol); molar vol-
umes at normal boiling point are listed in Table 6.5
μ
b
= viscosity of liquid (centipoise ...
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Publisher Resources

ISBN: 9781420089684