Droplet coalescence on fibres

Clogging of fibre filters by submicron droplets. Phenomena and influence of operating conditions

“…The formation of the liquid membrane at the intersection of the ÿbres responsible for the exponential rise could therefore be premature as the drops of glycerol present a larger surface area to the ow. The surface tension of the aerosol therefore plays a crucial role and corroborates the in uence of surface tension on the arrangement of the drop on the ÿbre proposed by Briscoe et al (1991).…”

“…The following table summarises the three possible types of conÿguration and provides an overview of the in uence of the main parameters on the di erent droplet arrangements on the ÿbre. Briscoe et al (1991) furthermore noted that the contact angle has a considerable in uence on the form of the liquid deposit on the ÿbre (Table 1). Liew and Conder (1985) studied the ÿltration of a liquid aerosol by ÿlters with wet ÿbres.…”

“…For a larger angle (¿ 60 • according to Minor et al, 1959) the conÿguration is asymmetrical. Briscoe, Galvin, Luckham, and Saeid (1991) highlighted a third type of conÿguration in which the liquid surrounds the ÿbre but has no axis of symmetry with it. The following table summarises the three possible types of conÿguration and provides an overview of the in uence of the main parameters on the di erent droplet arrangements on the ÿbre.…”

“…They examined the distribution of the liquid within the ÿlter. The deposit is presented according to two Table 1 The di erent droplet/ÿbre conÿgurations-in uence of the main parameters (Briscoe et al, 1991) aspects that depend on the packing density of the ÿlter. The diagram in Fig.…”

Experimental observations of the transition pressure drop characteristics of fibrous filters loaded with oil-coated particles

“…A similar high-surface-tension effect was reported by Contal et al [9] for glycerol droplet loading. Their report summarized the work done by Briscoe et al [23], and explained that oil droplets with a high surface tension tend to form clamshells or beads on fibers, and those with a low surface tension tend to form undulating shapes on fibers. Consequently, the collected glycerol droplets would offer a specific area larger than that found in low-surface-tension oil.…”