Transport Processes and Separation Process Principles, 5th Edition

Notation

SI units are given first (followed by English and/or cgs units).

a	shape factor, dimensionless
a	particle radius, m (ft)
a	area, m2 (ft2); also m2 area/m3 volume bed or packing (ft2/ft3)
ae	acceleration from centrifugal force, m/s2 (ft/s2)
av	specific surface area of particle, m–1 (ft–1)
A	cross-sectional area, m2 (ft2, cm2); also area, m2 (ft2)
A	absorption factor = L/mV, dimensionless; also filter area, m2 (ft2)
Am	membrane area, cm2, m2 (ft2)
Aw	solvent permeability constant, kg/s · m2 · atm
As	solute permeability constant, m/s (ft/h)
b	length, m (ft, cm)
B	length of side in structured packing, cm (in.)
B	flow rate of dry solid, kg/h (lbm/h); also filtration constant, s/m3 (s/ft3)
B	physical property of ...