A5010135694- Fluid Dynamics and Turbulent Flows
- Click Chemistry and Applications
- Aerodynamics and Acoustics in Jet Flows
- Wind and Air Flow Studies
- Particle Dynamics in Fluid Flows
- Carbohydrate Chemistry and Synthesis
- Chemical Synthesis and Analysis
- Meteorological Phenomena and Simulations
- Heat Transfer Mechanisms
- Atmospheric aerosols and clouds
- Nuclear Engineering Thermal-Hydraulics
- X-ray Diffraction in Crystallography
- Catalytic C–H Functionalization Methods
- Hydrology and Sediment Transport Processes
- Marine and fisheries research
- Peptidase Inhibition and Analysis
- Glycosylation and Glycoproteins Research
- Plant Water Relations and Carbon Dynamics
- Synthesis and biological activity
- Soil and Unsaturated Flow
- Monoclonal and Polyclonal Antibodies Research
- Radical Photochemical Reactions
- Synthesis and Characterization of Heterocyclic Compounds
- Precipitation Measurement and Analysis
- Crystallization and Solubility Studies
Indian Institute of Tropical Meteorology
2019-2025
Ministry of Earth Sciences
2021-2025
Banaras Hindu University
2020-2024
Indian Institute of Technology Bombay
2024
We present a novel generalized scaling framework and predictive model for wall friction in turbulent flows. The is derived from the dynamical equations, total mean-flow kinetic energy velocity profile shape factor are used as surrogates boundary condition effects. Veracity of approach assessed using data literature spanning unprecedented ranges flow types, Reynolds numbers, accelerations, history Unlike previous models that solely apply to standard flows, reconciles nonstandard flows with...
Statistical and fractal properties of the scalar interface in a plane turbulent wall jet air are investigated experimentally. Seeding is introduced for only flow. These seed particles do not diffuse or evaporate quickly, contrast to smoke that commonly used flows. Three cameras placed one above other operated single-frame mode image instantaneous between seeded unseeded ambient fluid with sub-Kolmogorov spatial resolution an unprecedented dynamic range (large-to-small scale ratio) 2450. The...
A novel organocatalyzed [3+2] cycloaddition reaction of nitroolefins with glycosyl azides as well organic has been developed for successful construction 1,5-disubstituted triazolyl glycoconjugates. This metal-free and acid-free, regioselective synthetic protocol proceeds in the presence only Schreiner thiourea organocatalysts, which enable required activation through double hydrogen bonding. The straightforward, operationally simple, regioselectivity this methodology, complementing to...
Abstract The demand for effective methods to augment precipitation over arid regions of India has been increasing the past several decades as changing climate brings warmer average temperatures. In fourth phase Cloud Aerosol Interaction and Precipitation Enhancement Experiment (CAIPEEX IV), a scientific investigation was conducted rain-shadow region Western Ghats mountains in India. primary objective investigate efficacy hygroscopic seeding convective clouds develop cloud protocol. CAIPEEX...
This report describes a convenient method for the Cu(I)-catalyzed Sonogashira cross-coupling reaction of aryl/heteroaryl halides and alkynyl sugars in presence 1,2,3-triazole-appended glycohybrid as biocompatible ligand. The products were exclusively formed without Glaser-Hay homocoupling glycosyl monotriazolyl ligand at 120 °C. However, obtained 60–70 °C bis-triazolyl-based macrocyclic L8. triazole ligands synthesized via CuI/DIPEA-mediated regioselective CuAAC click reaction, series...
Plane turbulent wall jets are traditionally considered to be composed of a boundary layer (TBL) topped by half-free jet. However, certain peculiar features, such as counter-gradient momentum flux occurring below velocity maximum in experiments and numerical simulations, suggest different structure turbulence therein. Here, we hypothesize that has two distinct structural modes, mode scaling on variables free-jet jet variables. To investigate this hypothesis, experimental data from our...
Studies in the literature on plane turbulent wall jets flat surfaces, have invariably considered either nozzle initial conditions or asymptotic far downstream, as scaling parameters for streamwise variations of length and velocity scales. These choices, however, do not square with notion self similarity which is essentially a "local" concept. We first demonstrate that scales show remarkable local i.e. there appear to be no imposed Next, it shown mean profile data suggest existence two...
A new asymptotic −1/2 power-law scaling is derived from the momentum integral equation for drag in flat-plate turbulent boundary layers. In limit of infinite Reynolds number, appropriate velocity scale found to be M/ν, where M layer kinematic rate and ν fluid viscosity. Data covering a wide range numbers remarkably collapse universal curve variables. Two models, discrete continuous, are proposed this curve, robust estimation method, based on these also presented.
Friction factor models for turbulent flow in smooth pipes express friction λ as a function of the bulk Reynolds number ReD and may be broadly grouped into two categories: power-law log-law models. While former stem from spectral scaling arguments applied to eddy momentum transfer close wall, latter are derived mean velocity log law known consistent with attached model wall turbulence structure. Interestingly, none these individually describes entire range numbers (Re) accessed date, without...
A dynamically consistent scaling of mean skin friction in zero-pressure-gradient turbulent boundary layers and fully developed pipe channel flows, is derived. Theoretical arguments are based on transfer kinetic energy from flow to large eddies turbulence. single new velocity scale $M/\nu$ shown be relevant for all flows; $M$ the planar kinematic momentum rate shear $\nu$ fluid viscosity. An asymptotic $-1/2$ power law (in – scaling) universally applicable. It observed that semi-empirical...
This review paper unravels a number of novel applications nanotechnology-based graphene oxide in bioengineering. Graphene is the chemically modified version graphene. It possesses many properties which include having large surface area and high mechanical strength with excellent potential for functionalization. Hence, GO has become an attractive material numerous discusses in-depth its five most important areas bioengineering, tissue engineering, drug delivery systems, biosensors, orthopedic...
Abstract A towfish is a passive underwater vehicle that towed behind surface vessel. The often designed to be symmetric from all directions primarily achieve balanced hydrodynamic behaviour and foreseeable manoeuvrability under water. External attachments or extruded slots can induce asymmetry, which will have an effect on the behaviour. An asymmetric experience uneven distribution of forces moments. This lead unstable orientation unpredictable So, asymmetry coefficients like drag...
Abstract N-Acylbenzotriazoles are valuable synthons in organic synthesis. They particularly used as acylating agents and an alternative to acyl chlorides. have been widely explored for a diverse range of applications. This review summarizes methods the preparation N-acylbenzotriazole derivatives their applications, particular demonstrating ability serve transformations such N-, O-, C-, S-acylating convenient synthesis wide biologically important compounds. We also emphasize compounds using...