Associate Professor, Indian Institute of Technology Madras (IIT Madras), Department of Aerospace Engineering
Visiting Professor 2021-22 - April 28 to May 25, 2022
Inviting Researcher: Thierry Dauxois
Manikandan Mathur is Assoicate professor at the Department of Aerospace Engineering of Indian Institute of Technology Madras (IIT Madras). There he also leads the Geophysical Flows Lab research initiative, which aims to combine fundamental laboratory studies, large-scale climate modeling, and new field measurements to improve our understanding and prediction of climate phenomena such as monsoons. His expertise includes theoretical and experimental studies of stratified and rotating flows, in addition to a recent interest in the use of drone technologies for oceanography and meteorology.
Collaboration with the Institute of Physics Laboratory (LPENSL)
Internal gravity waves are important in ocean dynamics, including global energy balance, global circulation and transport phenomena. Fundamental studies on the dissipation mechanisms of internal waves are therefore important both for the understanding of various oceanic phenomena and for the development of accurate parameterization schemes in large-scale climate models. During his next visit to ENS de Lyon, Manikandan Mathur will work with Thierry Dauxois and colleagues to study triadic resonance as a pathway to internal wave dissipation in finite depth stratified fluids at the laboratory scale. Specifically, the internal wave generator will be used to generate different primary internal waveforms, and then study the excitation of subharmonic and superharmonic secondary waves. The results of recent theoretical studies on the triadic resonance of internal waves will be used to motivate and compare the experimental observations. Laboratory experiments will also be used to explore the strongly nonlinear and viscous regimes that are inaccessible in theory.
Major works and publications
- Dheeraj Varma, M. Mathur and Thierry Dauxois. "Instabilities in internal gravity waves", Mathematics in Engineering, 5 (1), 1-34 (2022).
- Ramana Patibandla, M. Mathur and Anubhab Roy "Triadic resonances in internal wave modes with background shear", J. Fluid Mech., 929, A10-1-25 (2021).
- Pauline Husseini, Dheeraj Varma, Thierry Dauxois, Sylvain Joubaud, Philippe Odier and M. Mathur. "Experimental study on superharmonic wave generation by resonant interaction between internal wave modes", Physical Review Fluids 5, 074804 (2020).
- Dheeraj Varma, Vamsi Chalamalla and M. Mathur. "Spontaneous superharmonic internal wave excitation by modal interactions in uniform and nonuniform stratifications", Dynamics of Atmospheres and Oceans, 91, 101159 (2020).