Industrial Air Quality and Ventilation

xvList of Symbols

© 2010 Taylor & Francis Group, LLC

ρ density (ρ

1

, ρ

m

, particle material; ρ

2

, ρ, particle

stream air; ρ

0

, air outside a chute; ρ

2H

, ρ

2K

, air

at the chute inlet and outlet), kg/m

3

τ

time, s

τ

tangential stress, Pa

φ, φ

k

component slip ratio (relation of the induced air

speed to the particle speed at the chute outlet),

without unit of measurement

ψ particle resistance coefcient (ψ

0,

particles in the

area of self-similarity; ψ

0L

, sphere in the area of

self-similarity; ψ

c,

airborne particles; ψ*,

stream particles), without unit of measurement

CRITERIA

Re = wdρ/η

Reynolds number

υ=Fr gh /

1

2

Froude number

υ

()

=ρ

∗

Fr

Gg b/

11

3

1

modied Froude number ...