Pattern-formation & Interfacial-Instabilities-Group
Research
Research
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Pattern formation in compliant materials
Resonance phenomena
Interfacial instabilities in multiphase flows in microfluidic channels
Multiphase flows in thin films
Rayleigh-Taylor instability: Dynamics of two-phase thin films on a corrugated wall:
In this work we analyse the effect of a corrugated wall on the dynamics of two-phase thin films. It is shown that the corrugated wall can either stabilize or destabilize the evolution of Rayleigh-Taylor instability. Nonlinear simulations indicate that the sliding motion of the film can be arrested by tuning the amplitude of the coorugated wall.
Publised work: https://doi.org/10.1017/jfm.2021.960
Rayleigh-Taylor instability in compliant media:
We show that the Rayleigh-Taylor instability of compliant media can either result in saturated wave patterns or can lead to the rapture of the free surface. The physics behind this behaviour is explained using a weak nonlinear analysis.
Publised work: doi.org/10.1017/jfm.2021.80
Nature of branching in electrohydrodynamic instability:
It is shown that the electohydrodynamic instability of a perfect conductor and dielectric fluid pair always results in rupture of the interface. The reason behind this behaviour is explianed by carying out a linear stability analysis and a weak nonlinear analysis.
Published work: doi.org/10.1103/PhysRevFluids.6.054001
Two-phase stratified flows through soft-gel coated channels:
The effect of the soft-gel coated walls in two-phase stratified flows was analysed. This work indicates that the soft-gel coated walls can either stabilize or destabilize an instability that evolves at the interface between the two phases. The physics behind the stablization or the destabilization is explained using an energy budget analysis.
Published work: doi.org/10.1103/PhysRevE.96.013119
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