N. Namiki et al., REMOVAL OF FINE PARTICLES FROM VARIOUS SU RFACES BY CONSECUTIVE PULSEAIR-JETS - PREDICTION OF PARTICLE REMOVAL EFFICIENCY WITH RESUSPENSION PARAMETER, Kagaku kogaku ronbunshu, 24(1), 1998, pp. 86-92
Consecutive pulse air jets are effective for the removal of fine parti
cles from various surfaces. In the present work, the removal efficienc
ies of spherical particles from smooth flat surfaces are correlated by
introducing three parameters (i. e., the fraction of particles remove
d by the first air jet blow, r(1), irremovable fraction of particles,
ao, and the parameter related to the fraction of particles removed by
each air jet blow, C'), and the dependencies of these parameters on F
(the ratio of drag force acting on a particle to van der Waals adhesi
on ford) are investigated. As a result, the removal efficiencies from
smooth flat surfaces are successfully correlated by these parameters,
and all of the parameters are well expressed as a single value functio
n of F. By applying these correlation equations to rough surfaces, it
is found that another parameter to express the roughness of surface i
s necessary in predicting three parameters as a function of F, althou
gh the removal efficiencies from rough surfaces are well correlated by
the three parameters. Further, it is found that there is a particle s
ize with a minimum removal efficiency for a given roughness of surface
.