61 citations · 188 across the 18 of their papers we have counts for
21 papers
Triggering flow asymmetry by lamella deflection during drop impact on superhydrophobic surfaces
Kartik Regulagadda, Shamit Bakshi, Sarit Kumar Das
Water drop impacting a superhydrophobic surface (SHS) rebounds completely with remarkable elasticity. For such an impact, the balance between the inertial and capillary forces asce…
Heat spreader with parallel microchannel configurations employing nanofluids for near active cooling of MEMS
Lakshmi Sirisha Maganti, Purbarun Dhar, T Sundararajan +1
While parallel microchannel based cooling systems have been around for quite a period of time, employing the same and incorporating them for near active cooling of microelectronic…
Towards the development of a macro-structured water-repellent surface
Regulagadda Kartik, Shamit Bakshi, Sarit Kumar Das
Drop-surface interaction is predominant in nature as well as in many industrial applications. Freezing rain is the frequent origin of ice accretion on surfaces. Superhydrophobic su…
Effects of interplay of nanoparticles, surfactants and base fluid on the interfacial tension of nanocolloids
A R Harikrishnan, Purbarun Dhar, PK Agnihotri +2
A systematically designed study has been conducted to understand and clearly demarcate the degree of contribution by the constituting elements to the surface tension of nanocolloid…
Selecting optimal parallel microchannel configurations for active hot spot mitigation of multicore microprocessors in real time
Lakshmi Sirisha Maganti, Purbarun Dhar, T Sundararajan +1
Design of effective micro cooling systems to address the challenges of ever increasing heat flux from microdevices requires deep examination of real time problems and has been tack…
Mega electrorheological phenomena in graphene nanogels
Purbarun Dhar, Ajay Katiyar, Arvind Pattamatta +1
Unprecedentedly massive electrorheology has been reported for dilute graphene nanoflakes based ER fluids that have been engineered as novel, readily synthesizable polymeric gels. P…
Bridging thermal and electrical transport in dielectric nanostructure based polar colloids
Purbarun Dhar, Arvind Pattamatta, Sarit K. Das
Heat and charge transport characteristics of nanocolloids have been bridged from fundamental analysis. The relationship between the two transport phenomena in dielectric nanostruct…
Percolation network dynamicity and sheet dynamics governed viscous behavior of poly-dispersed Graphene nano-sheet suspensions
Purbarun Dhar, Mohammad Hasan Dad Ansari, Soujit Sengupta +4
The viscosity of Graphene nano-sheet suspensions (GNS)and its behavior with temperature and concentration have been experimentally determined. A physical mechanism for the enhanced…
Thermally smart characteristics of nanofluids in parallel microchannel systems to mitigate hot spots in MEMS
Lakshmi Sirisha Maganti, Purbarun Dhar, T Sundararajan +1
Mitigation of hot spots in MEMS employing in situ microchannel systems requires a comprehensive picture of the maldistribution of the working fluid and uniformity of cooling within…
Analytical prediction of sub surface thermal history in translucent tissue phantoms during plasmonic photo thermotherapy
Purbarun Dhar, Anup Paul, Arunn Narasimhan +1
Knowledge of thermal history in biological tissues during laser based hyperthermia is essential to achieve necrosis of tumour orcarcinoma cells. A semi analytical model to predict…
Particle and thermo-hydraulic maldistribution of nanofluids in parallel microchannel systems
Lakshmi Sirisha Maganti, Purbarun Dhar, T. sundararajan +1
Fluidic maldistribution in microscale multichannel devices requires deep understanding to achieve optimized flow and heat transfer characteristics. A thorough computational study h…
Near field magnetostatics and Neel Brownian interactions mediated magnetorheological characteristics of highly stable nano ferrocolloids
Ajay Katiyar, Purbarun Dhar, Sarit K. Das +1
Magnetic nanocolloids with synthesized super paramagnetic Fe3O4 nanoparticles (SPION) (5 to 15 nm) dispersed in insitu developed Polyethylene Glycol (PEG 400) and nano silica compl…
Enhanced dielectric breakdown performance of anatase and rutile titania based nano-oils
Ajay Katiyar, Purbarun Dhar, Lakshmi Sirisha Maganti +1
Nano oils synthesized by dispersing dielectric nanostructures counter common intuition as such nano oils possess substantially higher positive dielectric breakdown voltage with red…
Anomalously augmented charge transport capabilities of biomimetically transformed collagen intercalated nano graphene based biocolloids
Purbarun Dhar, Soumya Bhattacharya, Suprabha Nayar +1
Collagen micro fibrils bio mimetically intercalate graphitic structures in aqueous media to form graphene nano platelets collagen complex (G Cl). Synthesized G Cl based stable, aqu…
Trimodal Charge Transport in Polar Liquid based Dilute Nanoparticulate Colloidal Dispersions
Purbarun Dhar, Arvind Pattamatta, Sarit K. Das
The dominant modes of charge transport in variant polar liquid based nanoparticulate colloidal dispersions (dilute) have been theorized. Theories formulating electrical characteris…
Colloidal graphite/graphene nanostructures using collagen showing enhanced thermal conductivity
Soumya Bhattacharya, Purbarun Dhar, Sarit K Das +3
Time kinetics of interaction of natural graphite (GR) to colloidal graphene (G) collagen (C) nanocomposites was studied at ambient conditions, and observed that just one day at amb…
The Role of Percolation and Sheet Dynamics during Heat Conduction in poly-dispersed Graphene Nanofluids
Purbarun Dhar, Arvind Pattamatta, Sarit K. Das
A thermal transport mechanism leading to the enhanced thermal conductivity of Graphene nanofluids has been proposed. The Graphene sheet size is postulated to be the key to the unde…
Criterion for sliding / rolling characterization during droplet motion over superhydrophobic surfaces
Indrajit P. Wadgaonkar, T. Sundararajan, Sarit K. Das
Super hydrophobic surfaces have been the focus of research in the recent years.One of the reasons for this is the self cleaning property of these surfaces which emerges from the ab…
Magnetic field induced augmented thermal conduction phenomenon in magneto nanocolloids
Ajay Katiyar, Purbarun Dhar, Tandra Nandi +1
Magnetic field induced drastically augmented thermal conductivity of magneto nanocolloids involving magnetic oxide nanoparticles, viz. Fe2O3, Fe3O4, Nickel oxide (NiO), Cobalt oxid…
Particle fluid interactivity deteriorates buoyancy driven thermal transport in nanosuspensions : A multi component lattice Boltzmann approach
Savithiri S, Purbarun Dhar, Arvind Pattamatta +1
Severe contradictions exist between experimental observations and computational predictions regarding natural convective thermal transport in nanosuspensions. The approach treating…
Superior dielectric breakdown strength of graphene and carbon nanotube infused nano oils
Purbarun Dhar, Ajay Katiyar, Lakshmi Sirisha Maganti +2
Nano oils comprising Graphene nanoflakes and CNTs have been experimentally observed for the first time to exhibit augmented dielectric breakdown strengths compared to the base tran…