A5068244186- Fluid Dynamics and Turbulent Flows
- Biomimetic flight and propulsion mechanisms
- Fluid Dynamics and Vibration Analysis
- Lattice Boltzmann Simulation Studies
- Plasma and Flow Control in Aerodynamics
- Aerodynamics and Acoustics in Jet Flows
- Computational Fluid Dynamics and Aerodynamics
- Aerospace Engineering and Energy Systems
- Cardiovascular Function and Risk Factors
- Aerodynamics and Fluid Dynamics Research
- Cardiac Valve Diseases and Treatments
- Wind and Air Flow Studies
- Underwater Vehicles and Communication Systems
- Particle Dynamics in Fluid Flows
- Voice and Speech Disorders
- Turbomachinery Performance and Optimization
- Fish Ecology and Management Studies
- Coding theory and cryptography
- Speech Recognition and Synthesis
- Cardiac Imaging and Diagnostics
- Coronary Interventions and Diagnostics
- Quantum Computing Algorithms and Architecture
- Heat Transfer Mechanisms
- Phonocardiography and Auscultation Techniques
- Fluid Dynamics Simulations and Interactions
Johns Hopkins University
2016-2025
Indian Institute of Technology Kanpur
2016-2024
Aligarh Muslim University
2022-2023
Illinois Institute of Technology
2023
Johns Hopkins Medicine
2015-2022
University of Mississippi
2022
Harvard University Press
2022
Clemson University
2022
Delhi Technological University
2020-2021
Instruments Research & Development Establishment
2019
The field of fluid mechanics is rapidly advancing, driven by unprecedented volumes data from experiments, measurements, and large-scale simulations at multiple spatiotemporal scales. Machine learning (ML) offers a wealth techniques to extract ...Read More
Af ormation criterion for synthetic jets is proposed and validated. A jet actuator a zero-net mass-flux device that imparts momentum to its surroundings. Je tf defined as the appearance of time-averaged outward velocity along axis corresponds generation subsequent convection or escape vortex ring. It shown over wide range operating conditions formation governed by Strouhal number Sr (or Reynolds Re Stokes S). Both numerical simulations experiments are performed supplement available...
Numerical simulations are used to investigate the effect of aspect ratio on wake topology and hydrodynamic performance thin ellipsoidal flapping foils. The study is motivated by quest understand hydrodynamics fish pectoral fins. employ an immersed boundary method that allows us simulate flows with complex moving boundaries fixed Cartesian grids. A detailed analysis vortex shows low-aspect-ratio foils dominated two sets interconnected loops evolve into distinct rings as they convect...
We have simulated flow past a circular cylinder at Reynolds number of 3.9 X 10 3 using solver that employs an energy-conservative second-order central difference scheme for spatial discretization. Detailed comparisons turbulence statistics and energy spectra in the downstream wake region (7.0 < x/D 10.0) been made with results Beaudan Moin experiments to assess impact numerical diffusion on flowfield. Based these comparisons, conclusions are drawn suitability higher-order upwind schemes LES...
A new approach for wall modeling in Large-Eddy-Simulations (LES) is proposed and tested various applications. To properly include near-wall physics while preserving the basic economy of equilibrium-type models, we adopt classical integral method von Karman Pohlhausen (VKP). velocity profile with parameters as an alternative to numerical integration boundary layer equations zone. The contains a viscous or roughness sublayer logarithmic additional linear term that can account inertial pressure...
It has been known for some time that two-dimensional numerical simulations of flow over nominally bluff bodies at Reynolds numbers which the is intrinsically three dimensional, lead to inaccurate prediction lift and drag forces. In particular, past a normal flat plate (International Symposium on Nonsteady Fluid Dynamics, edited by J. A. Miller D. P. Telionis, 1990, pp. 455–464) circular cylinders [J. Wind Eng. Indus. Aerodyn. 35, 275 (1990)], it noted coefficient computed from significantly...
The tip-leakage flow in a turbomachinery cascade is studied using large-eddy simulation with particular emphasis on understanding the underlying mechanisms for viscous losses vicinity of tip gap. Systematic and detailed analysis mean field turbulence statistics has been made linear moving endwall. Gross features vortex, tip-separation vortices, blade wake have revealed by investigating their revolutionary trajectories velocity fields. vortex identified regions significant streamwise deficit...
We conduct a series of large-eddy simulations (LES) to examine the mean flow behaviour within roughness layer turbulent boundary over rough surfaces. consider several configurations consisting arrays rectangular-prism elements with various spacings, aspect ratios and height distributions. The results provide clear evidence for exponential respect wall normal distance. Such has been proposed before (see, e.g., Cionco, 1966 Tech. Rep. DTIC document), is represented as $U(z)/U_{h}=\exp...
State conversion generalizes query complexity to the problem of converting between two input-dependent quantum states by making queries input. We characterize this introducing a natural information-theoretic norm that extends Schur product operator norm. The systems is given distance them, as measured In special case function evaluation, closely related general adversary bound, semi-definite program lower-bounds number input needed algorithm evaluate function. thus obtain bound characterizes...
A comprehensive computational fluid-dynamics-based study of a pleated wing section based on the Aeshna cyanea has been performed at ultra-low Reynolds numbers corresponding to gliding flight these dragonflies. In addition wing, simulations have also carried out for its smoothed counterpart (called 'profiled' airfoil) and flat plate in order better understand aerodynamic performance wing. The employ sharp interface Cartesian-grid-based immersed boundary method, detailed critical assessment...
Numerical simulations are used to investigate the flow associated with a bluegill sunfish ( Lepomis macrochirus ) pectoral fin during steady forward motion. The intended match experiments of Lauder et al . Bioinsp. Biomim. , vol. 1, 2006, p. S25), and results obtained from complement experimental analysis. focus current paper is on quantitative characterization propulsive performance fin, which undergoes significant deformation its stroke. This includes detailed analysis thrust production...
Insect wings can undergo significant chordwise (camber) as well spanwise (twist) deformation during flapping flight but the effect of these deformations is not understood. The shape and size butterfly leads to particularly large wing deformations, making them an ideal test case for investigation effects. Here we use computational models derived from experiments on free-flying butterflies understand time-varying twist camber aerodynamic performance insects. High-speed videogrammetry used...
CD = dimensionless mean drag coefficient, 2F D= fU meanD F D force per unit spanwise length on the cylinder and plate, Nm 1 diameter of cylinder, m E Young’s modulus, f oscillation frequency D=Umean Re Reynolds number, fUmeanD= Umean velocity at left boundary channel, ms V dilatational wave speed inside structure, E= s= p