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Proceedings of the 24th National and 2nd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2017)


ISBN Онлайн: 978-1-56700-478-6

ON THE STABILITY OF SURFACTANT LADEN DRAINING FILMS

DOI: 10.1615/IHMTC-2017.170
pages 111-115

Atul S Vivek
IIT Hyderabad

Harish N Dixit
Indian Institute of Technology Hyderabad, Telangana

Аннотация

The van der Waal's driven rupture of a thin viscous film laden with insoluble surfactants flowing down an incline is considered. A linear stability analysis of the system is carried out in the lubrication limit and two distinct modes of instability are identified. The modes are then found out to be Yih and Marangoni modes with additional dynamics imposed upon them due to the rupture process. The stability of rupturing films for flowing and stationary films with/without surface active agents are compared and a possible stabilization mechanism is put forward.