
184 Industrial Air Quality and Ventilation
© 2010 Taylor & Francis Group, LLC
x
l
y
b
u
x
l
y
b
yy
,,
≈
⋅−−
111
(4.312)
including the critical section where the injection area transitions into an injection area.
It would be of interest to analyze changes in the speed of injected air as a function
of the parameter
(Figure 4.17). We can notice asymptotic increases in u
x
as the
volumetric concentration of particles in the ow rises. A comparison of these nd-
ings with solutions found earlier reveals that the pressure gradient has virtually no
bearing on absolute velocities of injected air, and it can be ignored when calculating