Influence of dynamic interfacial properties on droplet breakup in plane hyperbolic flow

Autor:	W. G. M. Agterof, A. Boon, J. J. M. Janssen
Rok vydání:	1997
Předmět:	Environmental Engineering Plane (geometry) Chemistry General Chemical Engineering Thermodynamics Laminar flow Deformation (meteorology) Breakup Capillary number Viscoelasticity Condensed Matter::Soft Condensed Matter Physics::Fluid Dynamics Simple shear Shear flow Biotechnology
Zdroj:	AIChE Journal. 43:1436-1447
ISSN:	1547-5905 0001-1541
DOI:	10.1002/aic.690430607
Popis:	Droplet breakup in laminar flows is important in emulsification processes and polymer blending. The influence of surfactants on droplet deformation and breakup in a plane hyperbolic flow was studied experimentally in an opposed-stream device. As in the case of simple shear flow, the inhomogeneity of the surfactant distribution along the droplet interface has a pronounced effect. Our results are qualitatively consistent with other numerical studies for droplet breakup in an axisymmetric elongational flow. Also a striking similarity is noted with other experimental observations for the deformation and breakup of polymeric drops in a quasi-steady-plane hyperbolic flow. The critical capillary number for droplet breakup in the experiments correlates with the interfacial viscoelasticity, and a reformulation of the numerical framework in terms of interfacial elasticity parameters is suggested for future numerical work including other linear flows.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9ebe9ce337b43d425d7f8484f506b523 https://doi.org/10.1002/aic.690430607 Zobrazit plný text záznamu Plný text