8 citations · 12 across the 24 of their papers we have counts for
26 papers
Identifying the structure of dynamical transitions in logistic map
Aswin Balaji, Shruti Tandon, Shwetha Viswesh +3
Nonlinear dynamical systems manifest rich variety of dynamical states and transitions driven by fluctuations. To understand the pattern of fluctuations during dynamical transitions…
A Graph Neural Network Framework for Characterizing Rainfall Variability Regimes across India
Pradyumnan Raghuveeran, Gaurav Chopra, Ajay Bankar +1
The Indian Summer Monsoon shows significant spatial variation. While prior work primarily focused on forecasting rainfall amounts, little attention has been given to how consistent…
Metamorphosis of transition between states of limit cycle oscillations in aeroacoustic system
Siddharth Kancharlapalli, Beeraiah Thonti, Sivakumar Sudarshanan +2
Dynamical systems undergoing transition to oscillatory state exhibit change in the nature of the transition from supercritical to subcritical Hopf bifurcation or vice versa upon va…
A Deep Learning Earth System Model Simulation of Indian Monsoon Intraseasonal and Interannual Variability
Bijit Kumar Banerjee, Devabrat Sharma, R. I. Sujith +6
With the data-driven artificial intelligence/machine learning (AI/ML) models having demonstrated their ability to extend the prediction horizon of large-scale weather at a fraction…
Why is Seasonal Climate Predictable Beyond the Limit of Deterministic Predictability set by Chaos?
Vladimir García-Morales, Devabrat Sharma, Shruti Tandon +2
The Earth's climate is an ensemble of interacting, spatially extended oscillatory media ('climate systems') whose slow-changing averages coexist with chaotic, high-frequency weathe…
Prediction and Predictability of the Wet-Season Rainfall over Southeast India
Harini S, Devabrat Sharma, Yogenraj Patil +4
The challenge in predicting sub-regional climate within the Indian monsoon region is exacerbated by its increasing variability in a warming world. While exploring the seasonal pred…
Resolving the Paradox of Changing El Niño-Monsoon Relation through Synchronization of Chaotic Oscillators
Devabrat Sharma, Sagar Sedani, Shruti Tandon +3
For over a century, the relationship between Indian summer monsoon rainfall and El Nino-Southern Oscillation has been the foundation of 'long-range' prediction of Indian monsoon. T…
Periodic modulation of the space-filling nature of the turbulent flame leads to spiky heat release oscillations
Sivakumar Sudarsanan, Manikandan Raghunathan, Shwetha Viswesh +1
Spiky oscillations are characterized by slow-fast dynamics and are observed in excitable media such as neuronal membranes and cardiac cells. In a turbulent reactive flow system, we…
Modeling the influence of interactions on different variables in a turbulent thermoacoustic system
Aneesh Srivatsa, Shruti Tandon, Andrea Elizabeth Biju +3
Turbulent reacting flows confined to ducts are plagued by thermoacoustic instability, a state in which a positive feedback between flow, flame and acoustic perturbations leads to t…
Evaluation of High-Resolution Gridded Precipitation Datasets Against a Dense Rain Gauge Network During the Indian Summer Monsoon
Ajay Bankar, Praveenkumar Venkatesan, Rakesh V +2
Advancements in remote sensing have led to development of several satellite-derived precipitation products; however, their accuracy must be evaluated before use in scientific and o…
Universal self-similarity of hierarchical communities formed through a general self-organizing principle
Shruti Tandon, Nidhi Dilip Sonwane, Tobias Braun +3
Emergence of self-similarity in hierarchical community structures is ubiquitous in complex systems. Yet, there is a dearth of universal quantification and general principles descri…
A network-theoretic approach for characterizing Mack-mode instability in high-speed boundary layers
Sai Prasad Mohanty, Nikhil Khobragade, Gaurav Chopra +3
Here we present a network theory-based approach to investigate the Mack-mode instability signature found in high-speed schlieren data from a Mach 6 laminar boundary layer flow over…
Climatic Phase Transitions Unravel the Onset and Withdrawal of Indian Monsoon
Yogenraj Patil, Gaurav Chopra, Shruti Tandon +2
The livelihood and food security of more than a billion people depend on the Indian monsoon (IM). Yet, a universal definition of the large-scale season and progress of IM is missin…
A reduced-order mean-field synchronization model for thermoacoustic systems
Rohan K. Nakade, Samarjeet Singh, Jayesh M. Dhadphale +1
The synchronization phenomena in thermoacoustic systems leading to oscillatory instability can effectively be modeled using Kuramoto oscillators. Such models consider the nonlinear…
The role of disordered dynamics on the nature of transition in a turbulent reactive flow system
Sivakumar Sudarsanan, Induja Pavithran, R. I Sujith
The transition from a chaotic to a periodic oscillatory state can be smooth or abrupt in real-world turbulent systems. Although there have been several mathematical studies, the oc…
Metamorphosis of transition to periodic oscillations in a turbulent reactive flow system
Beeraiah Thonti, Sivakumar Sudarsanan, Ramesh S. Bhavi +3
The emergence of periodic oscillations is observed in various complex systems in nature and engineering. Thermoacoustic oscillations in systems comprising turbulent reactive flow e…
Strange Nonchaotic Attractor in an Unforced Turbulent Reactive Flow System
Beeraiah Thonti, Shruti Tandon, Premraj Durairaj +1
We discover strange nonchaotic attractor (SNA) through experiments in an unforced system comprising turbulent reactive flow. While models suggest SNAs are common in dynamical syste…
Early warnings are too late when parameters change rapidly
Rohit Radhakrishnan, Induja Pavithran, Valerie Livina +2
Early warning signals (EWSs) forewarn a sudden transition (or tipping) from a desirable state to an undesirable state. However, we observe that EWSs detect an impending tipping pas…
Identifying feedback directions in the mechanisms driving self-sustained thermoacoustic instability in a single-element rocket combustor
Somnath De, Praveen Kasthuri, Matthew E. Harvazinski +3
The occurrence of high frequency (>1000 Hz) thermoacoustic instability (TAI) sustained by mutual feedback among the acoustic field, heat release rate oscillations, and hydrodynamic…
Canard explosions in turbulent thermo-fluid systems
Ramesh S. Bhavi, Sivakumar Sudarsanan, Manikandan Raghunathan +2
A sudden transition to a state of high amplitude limit cycle oscillations is catastrophic in a thermo-fluid system. Conventionally, upon varying the control parameter, a sudden tra…
Model adaptive phase space reconstruction
Jayesh M. Dhadphale, K. Hauke Kraemer, Maximilian Gelbrecht +3
Phase space reconstruction (PSR) methods allow for the analysis of low-dimensional data with methods from dynamical system theory, but their application to prediction models, like…
Vortical interactions in turbulent thermoacoustic systems
Ankit Sahay, Muralikrishnan Gopalakrishnan Meena, R. I. Sujith
This study examines the dynamics of vortical interactions and their implications for mitigating thermoacoustic instability in a turbulent combustor. The regions of intense vortical…
Non-monotonic emergence of order from chaos in turbulent thermo-acoustic fluid systems
Aswin Balaji, Shruti Tandon, Norbert Marwan +2
Self-sustained order can emerge in complex systems due to internal feedback between coupled subsystems. Here, we present our discovery of a non-monotonic emergence of order amidst…
Emergence of order from chaos through a continuous phase transition in a turbulent reactive flow system
Sivakumar Sudarsanan, Amitesh Roy, Induja Pavithran +2
As the Reynolds number is increased, a laminar fluid flow becomes turbulent, and the range of time and length scales associated with the flow increases. Yet, in a turbulent reactiv…