AE Seminar

Some decades ago J. T. Stuart formulated a theory for nonlinear saturation of hydrodynamically unstable modes. He proposed that an unstable mode, upon gaining sufficient energy, distorts the mean flow. This mean flow distortion reduces the shear, thus reducing the inviscid energy production mechanism which eventually results in a saturation of instability. In a hypersonic […]

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 […]

Shape Memory phenomenon in some intermetallics like NiTi is well known. However, during arbitrary thermomechanical loading, these materials exhibit several other interesting, yet less-understood phenomena. In this talk, Thermal Arrest Memory and associated effects during interrupted phase transformations in shape memory alloys are discussed and some fascinating underpinnings in the associated martensitic transformations are highlighted. […]

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 […]

This seminar presents a systematic methodology for the design of flight control laws for Medium Altitude Long Endurance (MALE) UAV operating at high altitudes, including the development of control law for fully autonomous take-off and landing operations. The process begins by developing a detailed model of the aircraft, incorporating parameters such as mass, inertia, aerodynamic […]

Machine learning methods have attracted growing interest across many fields, including solid mechanics. Constitutive artificial neural networks (CANNs) have shown high efficiency and accuracy for modeling hyperelastic materials, while physics-informed neural networks (PINNs) provide a data-free alternative to conventional simulation techniques. However, standard PINNs often require large, complex networks and dense sampling in the simulation […]

Advancements in the aviation sector have consistently aimed to maximize efficiency through a multi-disciplinary approach, focusing on optimizing both structural and aerodynamic performance. Although modern aerospace structures are engineering marvels, they often lack or limit the flexibility observed in nature—such as the flexible, flapping wings of birds. This contrast underscores a significant opportunity to enhance […]

This talk will consist of parts: The first provides an overview of some interesting and challenging problems that have been studied over the past three decades by my research group. These studies span subsonic and supersonic flows and often involve developing or applying advanced diagnostics in difficult environments allowing us to peer into complex, feature-rich […]

VPG Laserone, a successor of IRE-Polus Ltd founded in 1991 by physicist Valentin P. Gapontsev, represents over three decades of scientific leadership in high-power fiber laser technology. The company has established a vertically integrated manufacturing ecosystem in Russia—localizing 85 % of component production and dedicating 25 % of its investments to R&D—to design, develop, and […]

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, […]