65 citations · 501 across the 48 of their papers we have counts for
53 papers
Magneto-coalescence phenomena in colliding ferrofluid droplets
Neeladri Sekhar Bera, Abhishek Kumar Jaiswal, Devranjan Samanta +1
We explore the collision hydrodynamics of a ferrofluid droplet falling freely onto a sessile droplet of the same liquid, in the presence of a horizontal magnetic field; a configura…
Quantitative Dried droplet Morphology and Image Analysis for Screening Adulteration in Milk
Neha Gautam, Sumita Mondal, Debanjan Das +1
Adulteration of milk with water, urea, calcium compounds and starch is still a widespread food safety problem, especially in areas where there is no access to laboratory based chem…
Elasto-hydrodynamics of droplet-pool-interactions
Md Sultan, Purbarun Dhar
In Newtonian fluids, impact of a droplet on a liquid pool births a cavity, crown, capillary waves, and Worthington jet. The corresponding hydrodynamic events for elastic or Boger f…
Interfacial-Thermo-Fluid-Adhesion Dynamics of Evaporating Capillary Bridges between Curved Surfaces
Arnov Paul, Subhadeep Mondal, Purbarun Dhar
We probe the evaporation mechanism, and the associated adhesion dynamics of liquid capillary bridges connecting two curved, solid substrates. The coupled thermo fluid species trans…
The magneto-Leidenfrost effect in ferrofluid droplets
Abhishek Kumar Jaiswal, Neeladri Sekhar Bera, Purbarun Dhar
The dynamic Leidenfrost effect LFE and behaviour of impinging colloidal droplets is strongly influenced by the impact and spreading paradigms. LFE actuated rebound and levitation o…
Evaporative thermo-fluidics and deposition patterns in surface-active droplets
Randeep Ravesh, A R Harikrishnan, Purbarun Dhar
We investigate the thermo solutal transport phenomena and deposition patterns during the evaporation of surfactant laden droplets experimentally and through theoretical scaling bas…
Ferro-hydrodynamics of droplet necking filaments
Neeladri Sekhar Bera, Apurba Roy, Purbarun Dhar
We explore the necking, filament thinning, and pinchoff dynamics of ferrofluid droplets within a magnetic field, via a simple and low-cost experimental method. In our studies, both…
The fluid dynamics of liquid mushrooms
Akshay Manoj Bhaskaran, Arnov Paul, Apurba Roy +2
Droplets that impact the surface of a deep liquid pool may form a vertical jet after the cavity formation event, provided they have sufficient impact energy. Depending on the assoc…
Droplet impact and splitting behaviour on superhydrophobic wedges
Gudlavalleti V V S Vara Prasad, Parmod Kumar, Purbarun Dhar +1
We report an extensive computational and experimental investigation of droplet impact and subsequent splitting hydrodynamics on superhydrophobic wedges. 2D and necessary 3D simulat…
Offset coalescence behaviour of impacting low-surface tension droplet on high-surface-tension droplet
Pragyan Kumar Sarma, Purbarun Dhar, Anup Paul
Impact of droplets of varying surface tension and subsequent spreading over a solid surface are inherent features in printing applications. In this regard, an experimental study of…
Deformation transients of confined droplets within interacting electric and magnetic field environment
Pulak Gupta, Purbarun Dhar, Devranjan Samanta
A theoretical exploration and an analytical model for the electro-magneto-hydrodynamics (EMHD) of leaky dielectric liquid droplets, suspended in an immiscible confined fluid domain…
Delay of Leidenfrost point during drop impact of surfactant solutions
Gudlavalleti V V S Vara Prasad, Purbarun Dhar, Devranjan Samanta
In this article, a novel method of increasing the dynamic Leidenfrost temperature is proposed through the addition of both anionic (SDS) and cationic (CTAB) surfactants to water dr…
Magnetoelastic effect in impact dynamics of nonNewtonian ferrofluid droplets
Gudlavalleti V V S Vara Prasad, Purbarun Dhar, Devranjan Samanta
In this article, we propose, with the aid of detailed experiments and scaling analysis, the existence of magneto-elastic effects in the impact hydrodynamics of non-Newtonian ferrof…
Thermal Response of Dielectric Nanoparticle Infused Tissue Phantoms during Microwave Assisted Hyperthermia
Dhiraj Kumar, Purbarun Dhar, Anup Paul
Hyperthermia has been in use for many years; as a potential alternative modality for cancer treatment. In this paper, an experimental investigation of microwave assisted thermal he…
Electrohydrodynamics of dielectric droplet collision with variant wettability surfaces
Nilamani Sahoo, Devranjan Samanta, Purbarun Dhar
In this article, we report experimental and semi analytical findings to elucidate the electrohydrodynamics EHD of a dielectric liquid droplet impact on superhydrophobic SH and hydr…
Advection kinetics induced self assembly of colloidal nanoflakes into microscale floral structures
Purbarun Dhar
This article explores the governing role of the internal hydrodynamics and advective transport within sessile colloidal droplets on the self assembly of nanostructures to form flor…
Surface declination governed asymmetric sessile droplet evaporation
Purbarun Dhar, Raghavendra Kumar Dwivedi, A R Harikrishnan
The article reports droplet evaporation kinetics on inclined substrates. Comprehensive experimental and theoretical analyses of the droplet evaporation behaviour for different subs…
Control and modulation of droplet vaporization rates via competing ferro- and electro-hydrodynamics
Purbarun Dhar, Vivek Jaiswal, Hanumant Chate +1
Modification and control over the vaporization kinetics of microfluidic droplets may have strong utilitarian implications in several scientific and technological applications. The…
Suppressed Leidenfrost phenomenon during impact of elastic fluid droplets
Purbarun Dhar, Soumya Ranjan Mishra, Ajay Gairola +1
The present article highlights the role of non-Newtonian (elastic) effects on the droplet impact phenomenology at temperatures considerably higher than the boiling point, especiall…
Competing advection decelerates droplet evaporation on heated surfaces
Abhishek Kaushal, Vivek Jaiswal, Vishwajeet Mehandia +1
In this article we report the atypical and anomalous evaporation kinetics of saline sessile droplets on surfaces with elevated temperatures. In a previous we showed that saline ses…
Hydrodynamics of magnetic fluid droplets on superhydrophobic surfaces
Nilamani Sahoo, Gargi Khurana, Devranjan Samanta +1
The study reports the aspects of postimpact hydrodynamics of ferrofluid droplets on superhydrophobic SH surfaces in the presence of a horizontal magnetic field. A wide gamut of dyn…
Evaporation kinetics of ferrofluid droplets in magnetic field ambience
Ankur Chattopadhyay, Raghvendra Kumar Dwivedi, A R Harikrishnan +1
The present article discusses the physics and mechanics of evaporation of pendent, aqueous ferrofluid droplets and modulation of the same by external magnetic field. We show experi…
Soluto-thermo-hydrodynamics influenced evaporation of sessile droplets
Abhishek Kaushal, Vivek Jaiswal, Vishwajeet Mehandia +1
The present article experimentally and theoretically probes the evaporation kinetics of sessile saline droplets. Observations reveal that presence of solvated ions leads to modulat…
Onset of rebound suppression in non Newtonian droplets post impact on superhydrophobic surfaces
Purbarun Dhar, Soumya Ranjan Mishra, Devranjan Samanta
Droplet deposition after impact on superhydrophobic surfaces has been an important area of study in recent years due to its potential application in reduction of pesticides usage.…