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Viscosity variation in fluid flows across scale
Arjun Sharma, Ritabrata Thakur, Sharath Jose +1
A wide range of natural and engineered fluid flows exhibit spatial or temporal viscosity variations, spanning scales from microbial locomotion to planetary mantle convection. These…
Enduring two-dimensional perturbations with significant non-modal growth
Sharath Jose
Laminar shear flows can display large non-modal perturbation growth, often through the lift-up mechansm, and can undergo subcritical transition to turbulence. The process is three-…
Effects of equatorially-confined shear flow on MRG and Rossby waves
Mukesh Singh Raghav, Sharath Jose, Amit Apte +1
Linear modal stability analysis of a mean zonal shear flow is carried out in the framework of rotating shallow water equations (RSWE), both under the -plane approximation and in…
Algebraic disturbances and their consequences in rotating channel flow transition
Sharath Jose, Vishnu Kuzhimparampil, Benoît Pier +1
It is now established that subcritical mechanisms play a crucial role in the transition to turbulence of non-rotating plane shear flows. The role of these mechanisms in rotating ch…