STC Seminar Hall, Dept. of Aerospace Engineering

Data-driven approaches have generated tremendous excitement in turbulence modeling, but enthusiasm has often outpaced scientific rigor. Many current AI/ML turbulence models lack physical interpretability, exhibit limited generalizability across flow regimes, and do not reflect the true dynamical nature of turbulence. A new strategy is needed—one that leverages AI while remaining fully compliant with the physics […]

Non-Hermitian wave dynamics challenge our conventional understanding of wave propagation, revealing transport behaviors inaccessible in Hermitian systems. In this seminar, I will present a few intriguing phenomena arising from these dynamics. In the first part, I will show a counterintuitive tunneling effect at the interface of a non-Hermitian system sandwiched between two Hermitian ones. Here, […]

Motivated by applications in the aerospace propulsion industry as well as other energy systems, the fundamental study of phase-locked shear-layer instabilities in high-speed impinging jets, has been of research interest for a long time. The study of instabilities is usually conducted with time derivatives of velocity field. However, time-resolved experimental data acquisition using particle image […]

Since the Apollo era, space has become an increasingly valuable domain for national security due to diplomatic, informational, and economic reasons. The last few years have seen exponential growth in the launch of space objects and there is an increased interest in having a permanent cislunar presence through the Artemis program. The understanding of motion […]

Miniaturised technologies, due to their portability, rapid responses, low powers and ability of multi-component integration, have received an ever-growing interest in areas like healthcare, air quality, and space research. This talk will provide an overview of my research in 3 domains of miniaturised technologies: a) microfluidics, b) MEMS sensors and c) nanoaerosol instruments. I will […]

Laser beam is highly affected by prevailing atmospheric conditions and limit the system performance for various applications. The talk mainly covers the cause of optical turbulence, its effects on laser beam and further discuss the technologies for controlling the beam for enhancing the effectiveness. Two main techniques namely the Tip-tilt correction for maintaining the beam […]

The intriguing annual migration of the dragonfly species, Pantala flavescens, was reported a century ago. The multi-generational, transoceanic migration circuit spanning 14000-18000 kms, from India to Africa is an  astonishing feat for an insect few cms in size. Wind, precipitation, fuel, breeding, and the life cycle affect  the migration, yet understanding of their collective role […]