205 citations · 296 across the 10 of their papers we have counts for
11 papers
An Aeroelastic Solver Integrating Reformulated-Vortex-Particle and Finite-Element Methods across Non-Conforming Interfaces
Neeraj Balachandar, A. Padmaprabhan, Vishnu R. Unni
We present (Variable Fidelity Unsteady Flow-FEniCS Exchange Interface), a modular aeroelastic solver for modeling two-way fluid-structure interaction (FSI) of f…
Nonlinear Model Predictive Control via Sequential Convex Programming for Drone-to-Drone Docking
Neeraj Balachandar, Shriram Hari, Vishnu R. Unni
Autonomous mid-air docking of multi-rotor vehicles under disturbance-driven target motion poses a constrained non-linear trajectory optimization challenge. This work formulates the…
Synchronization based model for turbulent thermoacoustic systems
Yue Weng, Vishnu R. Unni, R. I. Sujith +1
We present a phenomenological reduced-order model to capture the transition to thermoacoustic instability in turbulent combustors. The model is based on the framework of synchroniz…
Study of Interaction and Complete Merging of Binary Cyclones Using Complex Networks
Somnath De, Shraddha Gupta, Vishnu R Unni +5
Cyclones are amongst the most hazardous extreme weather events on Earth. When two co-rotating cyclones come in close proximity, a possibility of complete merger (CM) arises due to…
Control of growth of local heat release rate fluctuations to suppress thermoacoustic instability
M. Raghunathan, N. B. George, V. R Unni +3
This experimental study investigates the dynamical transition from stable operation to thermoacoustic instability in a turbulent bluff-body stabilized dump combustor. We conduct ex…
Neural ODE to model and prognose thermoacoustic instability
Jayesh Dhadphale, Vishnu R. Unni, Abhishek Saha +1
In reacting flow systems, thermoacoustic instability characterized by high amplitude pressure fluctuations, is driven by a positive coupling between the unsteady heat release rate…
Detection of Dynamical Regime Transitions with Lacunarity as a Multiscale Recurrence Quantification Measure
Tobias Braun, Vishnu R. Unni, R. I. Sujith +2
We propose lacunarity as a novel recurrence quantification measure and illustrate its efficacy to detect dynamical regime transitions which are exhibited by many complex real-world…
Synchronization framework for modeling transition to thermoacoustic instability in laminar combustors
Yue Weng, Vishnu R. Unni, R. I. Sujith +1
We, herein, present a new model based on the framework of synchronization to describe a thermoacoustic system and capture the multiple bifurcations that such a system undergoes. In…
Modeling ambient temperature and relative humidity sensitivity of respiratory droplets and their role in Covid-19 outbreaks
Swetaprovo Chaudhuri, Saptarshi Basu, Prasenjit Kabi +2
One of the many unresolved questions that revolves around the Covid-19 pandemic is whether local outbreaks can depend on ambient conditions like temperature and relative humidity.…
Universality in spectral condensation
Induja Pavithran, Vishnu R. Unni, Alan John Varghese +6
Self-organization is the spontaneous formation of spatial, temporal, or spatiotemporal patterns in complex systems far from equilibrium. During such self-organization, energy distr…
Universality in the emergence of oscillatory instabilities in turbulent flows
Induja Pavithran, Vishnu R. Unni, Alan J. Varghese +4
Spontaneous emergence of periodic oscillations due to self-organization is ubiquitous in turbulent flows. The emergence of such oscillatory instabilities in turbulent fluid mechani…