Investigating the effect of finite ionic size and solvent polarization on induced charge electro-osmosis around a perfectly polarizable cylinder DOI
Arka Das, Aditya Bandopadhyay

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(11)

Published: Nov. 1, 2024

Many industrially relevant microfluidic applications use concentrated solutions of macro-molecular solutes dissolved in polar solvents like water, which are typically deployed at high voltages. In this study, we investigate the effect finite ionic sizes and solvent polarization on induced charge electro-osmotic flow around a perfectly polarizable cylinder, electric field strengths concentrations. The is actuated by means direct current field, step response various parameters studied numerically. Finite sizes, defined through steric factor ν, modeled using modified Poisson–Nernst–Planck model. Additionally, field-dependent permittivity, characterized number A, accounts for molecular re-orientation effects. Our findings reveal an ion-size modulated decrement concentration electrical double layer augmentation field. Remarkably, resulting velocities increase with ion size. Solvent polarization, other hand, results marked reduction velocities. Steric effects, however, dominate over large range parameter space (applied voltage bulk concentration) as compared to polarization. Finally, demonstrate that unequal result asymmetries steady-state, thereby generating net electro-phoretic motion suspended particles.

Language: Английский

A facile design of porous heat sink optimized thermodynamically for thermo-hydraulic performance DOI
Avinash Kumar, Subradip Debnath, Chirodeep Bakli

et al.

Applied Thermal Engineering, Journal Year: 2024, Volume and Issue: 250, P. 123574 - 123574

Published: May 31, 2024

Language: Английский

Citations

6
Interplay of roughness and wettability in microchannel fluid flows—Elucidating hydrodynamic details assisted by deep learning DOI
Nilanjan Mondal, Vinay Arya,

P. Prabhu Prasad Sarangi

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(6)

Published: June 1, 2024

Under microconfinement, the complex interaction between surface roughness and fluid slippage yields unexpected variations in friction factor drag reduction. These arise from combined effects of hydrophobic interactions with hydrodynamic field. Our study investigates alterations frictional characteristics within long microchannels, considering slippage, hydraulic diameter, roughness. This exploration holds promise for precise reduction control applications lab-on-a-chip small-scale devices. To address computational limitations analyzing diverse conditions, we employ an artificial neural network prediction model, validated experimental numerical results. Contrary to macroscopic conclusions obtained Moody chart, our findings indicate that apart roughness, significantly influences factor. The interdependencies on flow parameters are thoroughly studied toward proposition a new slip-modified constricted formula, predicting microchannels hydrophobicity effects. machine-learning approach presents noteworthy counterpart moody chart at microscales offering potential unified continuum-based description include interfacial

Language: Английский

Citations

6
Passive fractionating mechanism for oil spill using shear-wettability modulation DOI
Vinay Arya, Abhirup Chaudhuri, Chirodeep Bakli

et al.

Nanoscale, Journal Year: 2024, Volume and Issue: 16(29), P. 13885 - 13894

Published: Jan. 1, 2024

An efficient oil separation device using graphene-like nanochannels, based on wettability, to address spills and chemical leaks across diverse environmental conditions.

Language: Английский

Citations

4
Confinement and wettability-driven dispersed phase hydrodynamics in cross-flow jets at low velocity and density ratios DOI
Nilanjan Mondal, Diptesh Biswas, Rabibrata Mukherjee

et al.

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(2)

Published: Feb. 1, 2025

The evolution characteristics of a low-velocity dispersed phase into continuous shear flow have numerous applications across biomedical devices, chemical processes, water management in fuel cells, spray systems, film deposition, and atomizing devices. arise from complex interplay wettability, hydrodynamics, interfacial properties, which, when constrained by confined geometries such as those present fascinating multiphase-multiphysics problem. This study investigates the impact signature geometry velocity ratio between phases on phase. footprint shape generated droplet guide pressure distribution, deformation, subsequent cross-flow-induced stretching. By systematically analyzing dynamic effects capillarity, inertia, air-shear, gravity, viscosity, confinement, we classify fate liquid within classical regimes: jetting, threading, dripping. These distinct regimes are mapped using non-dimensional numbers, quasi-universal characteristic is obtained relative to ratios. findings this research contribute precise control prediction dispersed-phase which play pivotal role enhancing efficiency generation harvesting deposition techniques, coatings, point-of-care diagnostic work underscores relevance integrating experimental computational insights for optimizing interface-driven processes interdisciplinary applications.

Language: Английский

Citations

0
Systematic design of tree-like branching network microchannel heat sinks for enhanced heat transfer with nanofluids DOI

Shashi Rastogi,

Nilanjan Mondal, Chirodeep Bakli

et al.

Applied Thermal Engineering, Journal Year: 2024, Volume and Issue: 257, P. 124272 - 124272

Published: Aug. 28, 2024

Language: Английский

Citations

2
To spill or not: Short-time pouring dynamics of a toppled liquid bottle DOI
Anirban Roy, Avinash Kumar, Subhabrata Ray

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(12)

Published: Dec. 1, 2024

A typical culinary setting involves liquid condiments with different constitutive behaviors stored in jars, bottles, pitchers, or spouts. In the dynamic kitchen environment, handling these might require pouring, drizzling, squeezing, tapping, demonstrating interplay of container geometry, fluid properties, and expertise. There is, course, occasional accidental toppling. We investigate combined effects surface confinement dimensions on short-time spilling pouring dynamics a toppled cuvette. While attesting to fact that smaller cuvettes (which can be termed as capillaries well) do not spontaneously spill, larger exhibit are dependent property, viscosity, flow rheology. For Newtonian liquids, it is observed determined largely by coupling viscous gravity forces inducing non-intuitive behavior at higher conduit dimensions. The inclusion rheology for non-Newtonian liquids soup makes only an properties but also function meniscus retraction demarcating “splatter” three regimes “not spilling,” “on verge “spontaneous spilling.” delineate interactions leading motion provide mapping whether would spill if momentarily then immediately returned upright position. This study aids understanding fascinating physics could lead new kitchen, biomedical, industrial technologies.

Language: Английский

Citations

0
Tanner: 90 years of Rheology DOI
Marco Ellero, Kostas D. Housiadas, N. Phan‐Thien

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(11)

Published: Nov. 1, 2024

Language: Английский

Citations

0
Investigating the effect of finite ionic size and solvent polarization on induced charge electro-osmosis around a perfectly polarizable cylinder DOI
Arka Das, Aditya Bandopadhyay

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(11)

Published: Nov. 1, 2024

Many industrially relevant microfluidic applications use concentrated solutions of macro-molecular solutes dissolved in polar solvents like water, which are typically deployed at high voltages. In this study, we investigate the effect finite ionic sizes and solvent polarization on induced charge electro-osmotic flow around a perfectly polarizable cylinder, electric field strengths concentrations. The is actuated by means direct current field, step response various parameters studied numerically. Finite sizes, defined through steric factor ν, modeled using modified Poisson–Nernst–Planck model. Additionally, field-dependent permittivity, characterized number A, accounts for molecular re-orientation effects. Our findings reveal an ion-size modulated decrement concentration electrical double layer augmentation field. Remarkably, resulting velocities increase with ion size. Solvent polarization, other hand, results marked reduction velocities. Steric effects, however, dominate over large range parameter space (applied voltage bulk concentration) as compared to polarization. Finally, demonstrate that unequal result asymmetries steady-state, thereby generating net electro-phoretic motion suspended particles.

Language: Английский

Citations

0