Dynamics of retracting surfactant-laden ligaments at intermediate Ohnesorge number
C. Ricardo Constante-Amores, Lyes Kahouadji, Assen Batchvarov, Seungwon Shin, Jalel Chergui, Damir Jurić, Omar K. Matar
Abstract
Three-dimensional direct numerical simulations of the ligaments retraction process over a range of system parameters that account for surfactant solubility, sorption kinetics, and Marangoni stresses are presented. The presence of surfactant inhibits the ``end-pinching'' mechanism and promotes neck reopening through Marangoni flow induced by the formation of surfactant concentration gradients that drive flow reversal toward the neck.
Topics & Concepts
Marangoni effectPulmonary surfactantMaterials scienceFlow (mathematics)KineticsChemistryMechanicsConvectionThermodynamicsPhysicsClassical mechanicsFluid Dynamics and Heat TransferFluid Dynamics and Thin FilmsRandom lasers and scattering media