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CDS Seminar (25th January 2021): Modeling Turbulence using Exact Coherent States
25 Jan @ 11:30 AM -- 12:30 PM
Department of Computational and Data Sciences
Research Seminar (Online)
SPEAKER: Dr. Balachandra Suri, Institute of Science and Technology, Austria
TITLE: “Computational Methods with Soft Computing for Process Modeling”
Date & Time: Jan 25, 2021, 11:30 AM
Title: “Modeling Turbulence using Exact Coherent States”
Turbulence is a paradigm for spatially extended chaotic dynamical systems. Despite the availability of well-defined governing equations, a low-dimensional model of (even moderate) turbulence that accurately captures its dynamical and statistical properties has eluded scientists. In recent years, time-series analysis of “spatiotemporally” resolved velocity fields from both numerical simulations and experiments has revealed a surprising level of order in turbulence, in the form of coherent structures. In this talk, we present a combined experimental and numerical study of a special class of coherent structures, called Exact Coherent States (ECS). We show that quantitatively accurate low-dimensional models of both turbulent dynamics and statistics can be constructed using ECS, at least when a flow is moderately turbulent.
Balachandra Suri is currently a postdoctoral researcher in the nonlinear dynamics and turbulence group at the Institute of Science and Technology, Austria. In 2017, he received a Ph.D. in Physics, with a minor in mechanical engineering, from the Georgia Institute of Technology-Atlanta USA. Prior to that, he received a 5-year integrated Master’s in physics from IIT-Kharagpur. Suri’s research lies at the intersection of nonlinear dynamics and fluid dynamics, focusing on the low-dimensional description of turbulence, hydrodynamic stability, hydrodynamic-quantum analogs, topological characterization of chaotic flows, and (more recently) friction in highly turbulent fluid flows.
Host: Konduri Aditya