75 citations · 360 across the 19 of their papers we have counts for
19 papers
Hydrodynamic capture and release of a microswimmer by a meniscus corner
Subhasish Guchhait, Harshita Tiwari, Sumesh P. Thampi +1
Biological microswimmers alter their motility in complex corner geometries, facilitating their survival. However, the dynamical features of low-Reynolds-number swimming at corners…
Modeling complex motility patterns for autophoretic microswimmers
Anupriya Dutta Roy, Smita S. Sontakke, Arvind Kumar +2
Symmetry breaking is essential for biological microswimmers to achieve locomotion in viscous environments. Such asymmetry in the swimming mechanism enables the generation of direct…
Emergence of run-and-tumble-like swimming in self-propelling artificial swimmers in soft microchannels
Smita S. Sontakke, Aneesha Kajampady, Mohd Suhail Rizvi +1
Biological microswimmers often encounter deformable boundaries in physiological conditions; for instance, the viscoelastic walls of reproductive tract during migration of spermatoz…
Flow fields around active droplets squeezing through tight confinements
Subhasish Guchhait, Smita Sontakke, Shubhadeep Mandal +1
Biological microswimmers, like euglena, deform their body shape to swim through tight confinements having length scales comparable to the microswimmer length scale. Recently, it wa…
Electrotaxis of self-propelling artificial swimmers in microchannels
Carola M. Buness, Avi Rana, Corinna C. Maass +1
Ciliated microswimmers and flagellated bacteria alter their swimming trajectories to follow the direction of an applied electric field exhibiting electrotaxis. Both for matters of…
Rupture of a surfactant-laden draining thin film
Atul S Vivek, Ranabir Dey, Harish N Dixit
Surfactant-laden thin liquid films overlaid on solid substrates are encountered in a variety of industrial and biological settings. As these films reach submicron thickness, they t…
Confinement induced three-dimensional trajectories of microswimmers in rectangular channels
Byjesh N. Radhakrishnan, Ahana Purushothaman, Ranabir Dey +1
We study the trajectories of a model microorganism inside three-dimensional channels with square and rectangular cross-sections. Using (i) numerical simulations based on lattice-Bo…
Oscillatory rheotaxis of active droplets in microchannels
Ranabir Dey, Carola M. Buness, Babak Vajdi Hokmabad +2
Biological microswimmers are known to navigate upstream of an external flow (positive rheotaxis) in trajectories ranging from linear, spiral to oscillatory. Such rheotaxis stems fr…
Electrowetting-Controlled Dropwise Condensation with Patterned Electrodes: Physical Principles, Modeling, and Application Perspectives for Fog Harvesting and Enhanced Heat Transfer
Harmen Hoek, Ranabir Dey, Frieder Mugele
Patterning the wettability of solid surfaces is a successful strategy to control the dropwise condensation of vapor onto partially wetting solid surfaces. We followed the condensat…
Emergence of bimodal motility in active droplets
Babak Vajdi Hokmabad, Ranabir Dey, Maziyar Jalaal +5
To explore and react to their environment, living micro-swimmers have developed sophisticated strategies for locomotion - in particular, motility with multiple gaits. To understand…
Electrically controlled localized charge trapping at amorphous fluoropolymer-electrolyte interfaces
Hao Wu, Ranabir Dey, Igor Siretanu +4
Charge trapping is a long-standing problem in electrowetting-on-dielectric (EWOD), causing reliability reduction and restricting its practical applications. Although this phenomeno…
Behaviour of flexible superhydrophobic striped surfaces during (electro-)wetting of a sessile drop
Arvind Arun Dev, Ranabir Dey, Frieder Mugele
We study here the microscopic deformations of elastic lamellae constituting a superhydrophobic substrate under different wetting conditions of a sessile droplet using electrowettin…
Soft electrowetting
Ranabir Dey, Mathijs van Gorcum, Frieder Mugele +1
Electrowetting is a commonly used tool to manipulate sessile drops on hydrophobic surfaces. By applying an external voltage over a liquid and a dielectric-coated surface, one achie…
Controlling shedding characteristics of condensate drops using electrowetting
Ranabir Dey, Jander Gilbers, Davood Baratian +3
We show here that ac electrowetting (ac-EW) with structured electrodes can be used to control the gravity-driven shedding of drops condensing onto flat hydrophobic surfaces. Under…
Contact angle hysteresis and oil film lubrication in electrowetting with two immiscible liquids
Jun Gao, Niels Mendel, Ranabir Dey +2
Electrowetting (EW) of water drops in ambient oil has found a wide range of applications including lab-on-a-chip devices, display screens, and variable focus lenses. The efficacy o…
Breath figures under electrowetting: electrically controlled evolution of drop condensation patterns
Davood Baratian, Ranabir Dey, Harmen Hoek +2
We show that electrowetting (EW) with structured electrodes significantly modifies the distribution of drops condensing onto flat hydrophobic surfaces by aligning the drops and by…
Electrically modulated dynamic spreading of drops on soft surfaces
Ranabir Dey, Ashish Daga, Sunando DasGupta +1
The intricate interaction between the deformability of a substrate and the dynamic spreading of a liquid drop on the same, under the application of an electrical voltage, has remai…
Electrically Modulated Wetting of Drops on Soft Dielectric Films
Ranabir Dey, Sunando DasGupta, Suman Chakraborty
The inter-connection between the elasticity of a dielectric film and the wetting of a sessile drop on the same, under an applied electrical voltage, remains unaddressed. Here, we r…
Electrohydrodynamics within electrical double layer in a pressure-driven flow in presence of finite temperature gradients
Tanmay Ghonge, Jeevanjyoti Chakraborty, Ranabir Dey +1
A wide spectrum of electrokinetic studies is modelled as isothermal ones to expedite analysis even when such conditions may be extremely difficult to realize in practice. As a clea…