35 citations · 84 across the 11 of their papers we have counts for
11 papers
Motility and interfacial instability of confined chemically active droplets
Pawan Kumar, Sobiya Ashraf, Naveen Tiwari +2
Microorganisms navigating through narrow spaces encounter significant hydrodynamic challenges. To overcome these constraints and sustain efficient motion, they employ adaptive stra…
Emergence of Order in Chemically Active Droplets: Temporal Dynamics and Collective Behavior
Sobiya Ashraf, Pawan Kumar, Prateek Dwivedi +3
Collective behaviors such as swarming, chemical signaling, and clustering are fundamental to biological microorganisms, enabling hierarchical colony formation, coordinated motion,…
Chemical interactions in active droplets
Prateek Dwivedi, Sobiya Ashraf, Pawan Kumar +2
Interactions among biologically active agents is facilitated by their self-generated chemical and hydrodynamic fields. In order to elucidate the pair-wise interactions between such…
Motility and pair-wise interactions of chemically active droplets in 1-D confinement
Pawan Kumar, Prateek Dwivedi, Sobiya Ashraf +2
Self-propelled droplets serve as ideal model systems to delve deeper into understanding of the motion of biological micro-swimmers by simulating their motility. Biological microorg…
Universal scaling law for electrified sessile droplets on a lyophilic surface
Dipin S. Pillai, Kirti Chandra Sahu
Electrified sessile droplets on solid surfaces are ubiquitous in nature as well as several practical applications. Although the influence of electric field on pinned sessile drople…
Deforming Active Droplets in Viscoelastic Media
Prateek Dwivedi, Atishay Shrivastava, Naveen Tiwari +2
To mimic the motion of biological swimmers in bodily fluids, a novel experimental system of micellar solubilization driven active droplets in a visco-elastic polymeric solution is…
Droplet Migration in the Presence of a Reacting Surfactant at Low Péclet Numbers
Souradeep Roychowdhury, Rajarshi Chattopadhyay, Rahul Mangal +1
A surfactant-laden droplet of one fluid dispersed in another immiscible fluid serves as an artificial model system capable of mimicking microbial swimmers. Either an interfacial ch…
Mode-Switching of Active Droplets in Macromolecular Solutions
Prateek Dwivedi, Atishay Shrivastava, Dipin Pillai +1
Typical bodily and environmental fluids encountered by biological swimmers consist of dissolved macromolecules such as proteins and polymers, often rendering them non Newtonian. To…
Thin-gap averaging of variable-viscosity flows: application to thermoviscous fingering
Dipin S. Pillai, Jason R. Picardo, R. Narayanan
A consistent averaging technique, using the weighted residual integral boundary layer (WRIBL) method, is presented for flow through a thin-gap geometry wherein the fluid's viscosit…
Rheotaxis of Active Droplets
Prateek Dwivedi, Atishay Shrivastava, Dipin Pillai +1
Rheotaxis is a well-known phenomenon among microbial organisms and artificial active colloids, wherein the swimmers respond to an imposed flow. We report the first experimental evi…
Solute Induced Jittery Motion of Self-Propelled Droplets
Prateek Dwivedi, Bishwa Ranjan Si, Dipin S. Pillai +1
The intriguing role of the presence of solutes in the activity of a self-propelling droplet is investigated. A system of self-propelling micron sized 4-pentyl-4-biphenylcarbonitril…