385 citations · 385 across the 4 of their papers we have counts for
4 papers
Explosive instability due to flow over a rippled bottom
Raunak Raj, Anirban Guha
In this paper, we study Bragg resonance, i.e. the triad interaction between surface and/or interfacial waves with bottom ripple, in presence of background velocity. We show that wh…
Failure of Nielsen-Ninomiya theorem and fragile topology in two-dimensional systems with space-time inversion symmetry: application to twisted bilayer graphene at magic angle
Junyeong Ahn, Sungjoon Park, Bohm-Jung Yang
We show that the Wannier obstruction and the fragile topology of the nearly flat bands in twisted bilayer graphene at magic angle are manifestations of the nontrivial topology of t…
Large density stratification stabilizes Rayleigh-Taylor instability in presence of shear
Raunak Raj, Anirban Guha
This letter investigates the effect of shear on Rayleigh-Taylor instability (RTI). Even simple uniform shear strongly influences the instability; longer waves are completely stabil…
On the inertial effects of density variation in stratified shear flows
Anirban Guha, Raunak Raj
In this paper, we first revisit the celebrated Boussinesq approximation in stratified flows. Using scaling arguments we show that when the background shear is weak, the Boussinesq…