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physics.flu-dyn2026
Nonlinear waves and conservative transport in soluble-surfactant falling films on compliant substrates
Sanghasri Mukhopadhyay, Asim Mukhopadhyay
We investigate finite-amplitude waves in a liquid film containing a soluble surfactant as it flows down an inclined compliant substrate. The coupled motion of the liquid and a spri…
physics.flu-dyn2026
A conservative bulk-surface closure for soluble-surfactant falling films: an analytical and numerical mass-balance audit
Sanghasri Mukhopadhyay, Asim Mukhopadhyay
Adsorption and desorption redistribute soluble surfactant between a liquid film and its free surface, but cannot change the total inventory in a closed periodic domain. We audit th…
physics.flu-dyn2026
Solutocapillary instability in slipping falling films
Sanghasri Mukhopadhyay, Séverine Millet, Bastien Di Pierro +1
We present a comprehensive framework for gravity-driven, surfactant-laden thin films flowing over slippery substrates, elucidating how wall slip modifies the coupled hydrodynamics…