BITS Faculty Publications: Recent submissions

Now showing items 6421-6440 of 12372

Electromagnetic field orientation and dynamics governs advection characteristics within pendent droplets

Harikrishnan, A.R. (ARXIV, 2018-07)

The article reports the domineering governing role played by the direction of electric and magnetic fields on the internal advection pattern and strength within salt solution pendant droplets. Literature shows that solutal ...
The competing effects of high zeta potential and finite ionic size on the thermal behaviour of pseudoplastic flows through confined spaces with hydrophobic surfaces

Harikrishnan, A.R. (Begell House, 2021-12)

We present Galerkin Finite Element computations of the temperature profile and Nusselt Number associated with the mixed electroosmotic and pressure driven flow of a power law non - Newtonian fluid through a micro/nano ...
Droplet Collision and Nucleation Hydrodynamics on Superhydrophobic Cylindrical Surfaces

Harikrishnan, A.R. (Springer, 2023-04)

Water drop impact onto hydrophobic cylindrical surfaces with four different curvature ratio were experimentally investigated. At lower Weber number impact droplet asymmetrically bounces from all curvature cases with increase ...
Mixed Pressure - Driven and Electrohydromagnetic flows of Power Law Fluids through narrow confinements at high zeta potentials

Harikrishnan, A.R. (Springer, 2023-04)

We investigate the flow a non – Newtonian (power law fluid) through a parallel plate microchannel under the combined action of a pressure gradient, axial electric field and perpendicular magnetic field (electromagnetohydrodynamic ...
Acknowledgment to the Reviewers of Fluids in 2022

Harikrishnan, A.R. (MDPI, 2023)

High-quality academic publishing is built on rigorous peer review. Fluids was able to uphold its high standards for published papers due to the outstanding efforts of our reviewers. Thanks to the efforts of our reviewers ...
Scaling analysis for azimuthal spreading and contact time of droplet impacting on superhydrophobic cylindrical surfaces

Harikrishnan, A.R. (AIP, 2023-09)

Drop impact on superhydrophobic surfaces has gained great attention because of its physics and application in water repellency, drag reduction, and anti-icing. Spreading lengths and the contact time are the crucial parameters ...
Internal advection dynamics in sessile droplets depend on the curvature of superhydrophobic surfaces

Harikrishnan, A.R. (ARXIV, 2018-06)

The article demonstrates that the internal circulation velocity and patterns in sessile droplets on superhydrophobic surfaces is governed by the surface curvature. Particle Image Velocimetry reveals that increasing convexity ...
Interplay of high zeta potential and steric factor on the slip thermofluidics of power law fluids through narrow confinements

Harikrishnan, A.R. (Elsevier, 2022-04)

Thermal transport in a non-Newtonian fluid flow through a parallel plate microchannel is investigated with an emphasis on the effects of high zeta potential and steric factor. The fluid viscosity is modelled using the power ...
Interplay of substrate inclination and wettability on droplet impact dynamics

Harikrishnan, A.R. (ARXIV, 2019-02)

Experimental investigations were carried out to elucidate the role of surface wettability and inclination on the post impact dynamics of droplets. Maximum spreading diameter and spreading time were found to decrease with ...
Adverse impact of macro-textured superhydrophobicity on contact time reduction at high Weber numbers

Harikrishnan, A.R. (Elsevier, 2022-11)

Macro textured superhydrophobic surfaces are reported to be highly effective in contact time reduction and thus a potential candidate for anti-icing applications. However, we find that the macro textured superhydrophobic ...
Influence of temperature and particle concentration on the pH of complex nanocolloids

Harikrishnan, A.R. (Springer, 2017-06)

The pH of colloids is an important electrokinetic property which determines phase stability. We report the effect of temperature and nanoparticle concentration on pH of different nanocolloids of nanomaterials of varied ...
Amplifying thermal conduction calibre of dielectric nanocolloids employing induced electrophoresis

Harikrishnan, A.R. (Elsevier, 2019-09)

Electrophoresis has been shown as a novel methodology to enhance heat conduction capabilities of nanocolloidal dispersions. A thoroughly designed experimental system has been envisaged to solely probe heat conduction across ...
Electrohydrodynamic fibrillation governed enhanced thermal transport in dielectric colloids under a field stimulus

Harikrishnan, A.R. (RSC, 2018-05)

Electrorheological (ER) fluids are known to exhibit enhanced viscous effects under an electric field stimulus. The present article reports the hitherto unreported phenomenon of greatly enhanced thermal conductivity in such ...
Streamer evolution arrest governed amplified AC breakdown strength of graphene and CNT colloids

Harikrishnan, A.R. (EPJP, 2019-02)

The present paper explores the concept of improving the AC dielectric breakdown strength of insulating mineral oils by the addition of graphene or carbon nanotubes (CNTs) to form stable dispersions. Experimental observations ...
Confined Evaporation-Mediated Enhanced Residence Time of Levitated Water Drops over Deep Oil Pools

Harikrishnan, A.R. (ACS, 2021-11)

We observe the impact of bouncing and floating of water drops on a pool of immiscible volatile oil pools at low Weber numbers. The residence time of the impacting drop ranges from a few milliseconds to a few seconds before ...
Governing Influence of Thermodynamic and Chemical Equilibria on the Interfacial Properties in Complex Fluids

Harikrishnan, A.R. (ACS, 2018-03)

We propose a comprehensive analysis and a quasi-analytical mathematical formalism to predict the surface tension and contact angles of complex surfactant-infused nanocolloids. The model rests on the foundations of the ...
Electromagnetic field orientation and characteristics governed hydrodynamics within pendent droplets

Harikrishnan, A.R. (APS, 2018-12)

This article reports the dominant governing role played by the direction of electric and magnetic fields on the internal advection pattern and strength within salt solution pendent droplets. The literature shows that solutal ...
Slip hydrodynamics of combined electroosmotic and pressure driven flows of power law fluids through narrow confinements

Harikrishnan, A.R. (Elsevier, 2021-10)

Electroosmotic flows (EOF) in microfluidic devices can be greatly enhanced over superhydrophobic surfaces because the high shear rates within the electrical double layer can drive large slip velocities at the interface. ...
Superhydrophobic Surface Curvature Dependence of Internal Advection Dynamics within Sessile Droplets

Harikrishnan, A.R. (ACS, 2019-01)

Sessile droplets seated on superhydrophobic surfaces are known to exhibit internal circulation patterns. The present article experimentally demonstrates and theoretically confirms, for the very first time, that the nature ...
Competitive Electrohydrodynamic and Electrosolutal Advection Arrests Evaporation Kinetics of Droplets

Harikrishnan, A.R. (ACS, 2020-07)

This article reports the hitherto unreported phenomenon of arrested evaporation dynamics in pendant droplets because of electric field stimulus. The evaporation kinetics of pendant droplets of electrically conducting saline ...

Now showing items 6421-6440 of 12372

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