Contraction of surfactant-laden pores

• Autores: Liu, Jiakai; Campana, Diego Martin; Corvalan, Carlos Maria
• Año de publicación: 2018
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: pore; nanopore; surfactant; free surface; DNS sequencing
• Institución: Consejo Nacional de Investigaciones Científicas y Técnicas

The contraction of surfactant-laden pores at the microscale has implications fornatural and technological processes ranging from the collapse of channels in lipid mem-branes to the stability of foams in the food processing industry. Despite its prevalence,our understanding of the mechanisms of pore contraction in the presence of surfactantsremains unclear. These mechanisms have been challenging to study experimentallygiven the small length scale near the singularity and simulations capable of accuratelycharacterizing the pore dynamics may help enhance our understanding of the process.Here, we use high-fdelity numerical simulations to gain insight into the uid dynamicsand interfacial phenomena underlying the contraction of viscous pores in the presenceof an insoluble surfactant. The simulations show that surfactants accumulate on theadvancing front of a collapsing pore due to the uneven deformation of the pore inter-face. Because of this accumulation, even a small amount of surfactant plays a major role in the way in which a collapsing pore approaches the singularity.
Fil: Liu, Jiakai. Purdue University; Estados Unidos
Fil: Campana, Diego Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia de Entre Ríos. Universidad Nacional de Entre Ríos. Centro de Investigaciones y Transferencia de Entre Ríos; Argentina. Universidad Nacional de Entre Ríos. Facultad de Ingeniería; Argentina
Fil: Corvalan, Carlos Maria. Purdue University; Estados Unidos