112 citations · 994 across the 84 of their papers we have counts for
27 papers · 1 filter
Stable Oleoplaned Slippery Surfaces on Biomimetically Patterned Templates
Saumyadwip Bandyopadhyay, Sriram S M, Anuja Das +2
With the advent of the technology of the oleoplaned slippery surfaces as the better solution to self-cleaning, anti fouling and self-healing smart surfaces, the stability of the oi…
Electric field- induced Pinch-off of a migrating compound droplet in confined micro channel
Somnath Santra, Sayan Das, Suman Chakraborty
The present study looks into the pinch-off dynamics of a compound droplet, which is suspended in another fluid in a parallel plate microchannel. The droplet is subjected to a trans…
Pitcher Plant Inspired Biomimetic Liquid Infused Slippery Surface Using Taro Leaf
Rahul Sharma, Sankha Shuvra Das, Udita Uday Ghosh +2
Bio-inspired anti-wetting surfaces, such as lotus leaf or pitcher plant, have led to the development of stable liquid infused slippery surfaces for various scientific applications.…
Interfacial viscosity-induced suppression of lateral migration of a surfactant-laden droplet in a non-isothermal Poiseuille flow
Devi Prasad Panigrahi, Somnath Santra, Theneyur Narayanaswamy Banuprasad +2
Understanding and modulating the cross-stream motion of a surfactant-coated droplet in pressure driven flow has great implications in many practical applications. A combination of…
Electrowetting of a nano-suspension on a soft solid
Sumit Kumar, Pawan Kumar, Sunando DasGupta +1
The wetting of solid surfaces can be manoeuvred by altering the energy balance at the interfacial region. While electric field acts favourably to spread a droplet on a rigid surfac…
An electrokinetic route to giant augmentation in load bearing capacity of compliant microfluidic channels
Siddhartha Mukherjee, Jayabrata Dhar, Sunando DasGupta +1
The performances of lubricated systems widely used in natural, biological, and artificial settings are traditionally dictated by their load bearing capacities. Here we unveil that,…
Rotational Instabilities in Stratified Miscible Layers
Saunak Sengupta, Sukhendu Ghosh, Sandeep Saha +1
Instability of stratified multi-phase flow in a rotating platform becomes important because of a potential role in micro-mixing and micro-machines. Centrifugal actuation can play a…
Alternating Current Electrothermal Flow for Energy Efficient Thermal Management of Microprocessor Hot Spots
Golak Kunti, Jayabrata Dhar, Anandaroop Bhattacharya +1
The paper presents numerical results on an innovative concept of an efficient, site-specific cooling technology for microprocessor hot spots using Alternating Current Electrotherma…
Directional free-surface flows on a microfluidic chip with interplay of electrical and thermal fields
Golak Kunti, Jayabrata Dhar, Anandaroop Bhattachariya +1
Free-surface electrokinetic flows have been attracting increasing attention from the research community over recent times, as attributable to their diverse fields of applications r…
Electrohydrodynamics of compound droplet in a microfluidic confinement
Somnath Santra, Sayan Das, Suman Chakraborty
The present study deals with the dynamics of a double emulsion confined in a microchannel under the presence of a uniform electric field. Towards investigating the non-trivial elec…
Rotational Instabilities in Microchannel Flows
Saunak Sengupta, Sukhendu Ghosh, Sandeep Saha +1
Mixing in numerous medical and chemical applications, involving overly long microchannels, can be enhanced by inducing flow instabilities. The channel length, is thus shortened in…
Auto-electrophoresis in non-Newtonian media: interaction of rheology and electrocatalytic parameters
Antarip Poddar, Aditya Bandopadhyay, Suman Chakraborty
Recent findings of possible applications of bio-friendly synthetic self-phoretic swimmers, have motivated the researchers in investigating the various motion-generating mechanisms…
Electrohydrodynamic settling of drop in uniform electric field at low and moderate Reynolds numbers
Nalinikanta Behera, Shubhadeep Mandal, Suman Chakraborty
Dynamics of a liquid drop falling through a quiescent medium of another liquid is investigated in external uniform electric field. The electrohydrodynamics of a drop is governed by…
Electrohydrodynamic migration of a surfactant-coated deformable drop in Poiseuielle flow
Antarip Poddar, Shubhadeep Mandal, Aditya Bandopadhyay +1
In this study we attempt to explore the consequences of surfactant coating on the electrohydrodynamic manipulation of a drop motion in a plane Poiseuielle flow. In addition we cons…
Electrohydrodynamic interaction between droplet pairs in confined shear flow
Somnath Santra, Diptendu Sen, Sayan Das +1
The present study deals with the numerical as well as asymptotic analysis of the electrohydrodynamic interaction between two deformable droplets in a confined shear flow. Consideri…
Transient drift of Escherichia coli under diffusing Step nutrient profile
Sibendu Samanta, Ritwik Layek, Shantimoy Kar +2
Bacteria such as Escherichia coli (E. coli) exhibit biased motion if kept in a spatially non-uniform chemical environment. Here, we bring out unique time-dependent characteristics…
Electric field-induced droplet deflection in microconfined flow
Somnath Santra, Shubhadeep Mandal, Aditya Bandopadhyay +1
The deflection of liquid droplet driven through a liquid medium under the combined action of transverse electric field and pressure driven flow has been studied in the present anal…
Effect of uniform electric field on the deformation of a 2D liquid droplet in confined simple shear flow
Somnath Santra, Shubhadeep Mandal, Suman Chakraborty
In the present study, we have studied the electro-hydrodynamic of a physical system where a Newtonian dielectric liquid column or droplet suspended in another Newtonian dielectric…
Electrothermally Modulated Dispersion in Viscoelastic Fluids on Patterned Surfaces
Siddhartha Mukherjee, Jayabrata Dhar, Sunando Dasgupta +1
Augmenting the dispersion of a solute species remains a challenging topic in electroosmotically-actuated flows due to the inherent plug-like feature of its velocity profile. In thi…
Alternating current driven interfacial dynamics of a binary fluid in a patterned fluidic environment modulated by electrothermal effects
Golak Kunti, Anandaroop Bhattacharya, Suman Chakraborty
In this paper, we depict interfacial electro-thermo-chemical-hydrodynamics of two immiscible fluids in a microchannel with substrates patterned by ribs. The motion of the binary fl…
Alteration in contact line dynamics through competition between thermocapillary and electrothermal effects
Golak Kunti, Anandaroop Bhattacharya, Suman Chakraborty
The contact line dynamics of a thermal field assisted flow configuration of two immiscible fluids is considered in a narrow thermofluidic pathway. The surfaces of the channel are w…
Electrothermally modulated stop-go microvalves for capillary transport systems
Golak Kunti, Debabrata DasGupta, Anandaroop Bhattacharya +1
In this article, we show a novel approach to implementing valving action in a dynamically evolving capillary filling process, by exploiting alternating current electrothermal (ACET…
Electrothermally induced flow in AC EWOD droplet
Golak Kunti, Anandaroop Bhattacharya, Suman Chakraborty
We show a novel way of generating electrohydrodynamic motion inside a droplet under AC electrowetting. Using a very low applied voltage (10<V) strong electrothermal motion can be g…
Surfactant-induced-retardation in lateral migration of droplets in a microfluidic confinement
Somnath Santra, Sayan Das, Sankha Shuvra Das +1
In the present study, the role of surfactants on the cross-stream migration of droplets is investigated both experimentally and theoretically. For experimental analysis, sunflower…