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Browsing by Author "Harikrishnan, A.R."

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Correlating contact line capillarity and dynamic contact angle hysteresis in surfactant-nanoparticle based complex fluids

Harikrishnan, A.R.; Dhar, P.; Agnihotri, P.K.; Gedupudi, S. (2018-12-31)

Dynamic wettability and contact angle hysteresis can be correlated to shed insight onto any solidliquid interaction. Complex fluids are capable of altering the expected hysteresis and dynamic wetting behavior due to ...
Effects of interplay of nanoparticles, surfactants and base fluid on the surface tension of nanocolloids

Harikrishnan, A.R.; Dhar, P.; Agnihotri, P.K.; Gedupudi, S.; Das, S.K. (2017-05-19)

A systematically designed study has been conducted to understand and demarcate the degree of contribution by the constituting elements to the surface tension of nanocolloids. The effects of elements such as surfactants, ...
Electrohydrodynamic fibrillation governed enhanced thermal transport in dielectric colloids under a field stimulus

Dhar, P.; Maganti, L.S.; Harikrishnan, A.R. (2018-12-22)

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 ...
Electromagnetic field orientation and characteristics governed hydrodynamics within pendent droplets

Dhar, P.; Jaiswal, V.; Harikrishnan, A.R. (2022-09-24)

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 ...
Electromagnetic field orientation and dynamics governs advection characteristics within pendent droplets

Dhar, P.; Jaiswal, V.; Harikrishnan, A.R. (2018-12-27)

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 ...
Governing influence of thermodynamic and chemical equilibria on the interfacial properties in complex fluids

Harikrishnan, A.R.; Dhar, P.; Gedupudi, S.; Das, S.K. (2018-10-10)

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 ...
Ionic solubility and solutal advection governed augmented evaporation kinetics of salt solution pendant droplets

Jaiswal, V.; Harikrishnan, A.R.; Khurana, G.; Dhar, P. (2018-12-21)

The presence of dispersed inclusions is known to modify the interfacial characteristics in liquids by adsorption–desorption of the ions at interfaces. The present article reports the influencing role of dissolved ions ...
Magnetohydrodynamics- and magnetosolutal-transport-mediated evaporation dynamics in paramagnetic pendant droplets under ﬁeld stimulus

Jaiswal, V.; Dwivedi, R.K.; Harikrishnan, A.R.; Dhar, P. (2018-08-31)

Evaporation kinetics of pendant droplets is an area of immense importance in several applications, in addition to possessing rich ﬂuid dynamics and thermal transport physics. This article experimentally and analytically ...
Optical thermogeneration induced enhanced evaporation kinetics in pendant nanofluid droplets

Harikrishnan, A.R.; Dhar, P. (2019-01-01)

Optofluidic manipulation using lasers and colloidal systems have immense applications in microscale thermofluidic devices. The present study analyses the effect of laser as an external optical source in modulating the ...
Oscillatory solutothermal convection-driven evaporation kinetics in colloidal nanoparticle-surfactant complex fluid pendant droplets

Harikrishnan, A.R.; Dhar, P.; Gedupudi, S.; Das, S.K. (2018-09-18)

To elucidate the pure physics of evaporation which is free from surface effects, the pendant mode of evaporation is employed in the present study. The present study brings out the evaporation kinetics of a combined ...
Post impact droplet hydrodynamics on inclined planes of variant wettabilities

Sahoo, N.; Khurana, G.; Harikrishnan, A.R.; Samanta, D.; Dhar, P. (2020-03-13)

Experimental investigations were carried out to elucidate the roles of surface wettability and inclination on the post-impact dynamics of droplets. The maximum spreading diameter and spreading time were found to decrease ...

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