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physics.flu-dyn2020
Early evolution of optimal perturbations in a viscosity-stratified channel
Ritabrata Thakur, Arjun Sharma, Rama Govindarajan
This work shows how the early stages of perturbation growth in a viscosity-stratified flow are different from those in a constant-viscosity flow, and how nonlinearity is a crucial…
physics.flu-dyn2019★ 4 cited
Analytic Reconstruction of a Two-Dimensional Velocity Field from an Observed Diffusive Scalar
Arjun Sharma, Irina I. Rypina, Ruth Musgrave +1
Inverting an evolving diffusive scalar field to reconstruct the underlying velocity field is an underdetermined problem. Here we show, however, that for two-dimensional incompressi…