A5101831886- Nanofluid Flow and Heat Transfer
- Heat Transfer and Optimization
- Heat Transfer Mechanisms
- Surface Modification and Superhydrophobicity
- Heat Transfer and Boiling Studies
- Fluid Dynamics and Heat Transfer
- Photoacoustic and Ultrasonic Imaging
- Gold and Silver Nanoparticles Synthesis and Applications
- Rheology and Fluid Dynamics Studies
- Power Transformer Diagnostics and Insulation
- Electrohydrodynamics and Fluid Dynamics
- Adhesion, Friction, and Surface Interactions
- Vibration Control and Rheological Fluids
- Graphene and Nanomaterials Applications
- Fuel Cells and Related Materials
- Fluid Dynamics and Turbulent Flows
- Phase Equilibria and Thermodynamics
- Characterization and Applications of Magnetic Nanoparticles
- Fluid Dynamics and Thin Films
- Thermal properties of materials
- Electrocatalysts for Energy Conversion
- 3D Printing in Biomedical Research
- Microfluidic and Capillary Electrophoresis Applications
- Graphene research and applications
- Innovative Microfluidic and Catalytic Techniques Innovation
Indian Institute of Technology Madras
2015-2024
Indian Institute of Technology Ropar
2006-2018
Indian Institute of Technology Bombay
2018
Indian Institute of Technology Kanpur
2018
Indian Institute of Technology Kharagpur
2018
Yale University
2018
Leibniz University Hannover
2013
Texas A&M University at Qatar
2013
Helmut Schmidt University
2009
Nanyang Technological University
2008
Usual heat transfer fluids with suspended ultra fine particles of nanometer size are named as nanofluids, which have opened a new dimension in processes. The recent investigations confirm the potential nanofluids enhancing required for present age technology. investigation goes detailed into investigating increase thermal conductivity temperature nano water base fluid and Al2O3 or CuO suspension material. A oscillation technique is utilized measurement diffusivity calculated from it. results...
Suspended nanoparticles in conventional fluids, called nanofluids, have been the subject of intensive study worldwide since pioneering researchers recently discovered anomalous thermal behavior these fluids. The enhanced conductivity fluids with small-particle concentration was surprising and could not be explained by existing theories. Micrometer-sized particle-fluid suspensions exhibit no such dramatic enhancement. This difference has led to studies other modes heat transfer efforts...
This article reports on the International Nanofluid Property Benchmark Exercise, or INPBE, in which thermal conductivity of identical samples colloidally stable dispersions nanoparticles “nanofluids,” was measured by over 30 organizations worldwide, using a variety experimental approaches, including transient hot wire method, steady-state methods, and optical methods. The nanofluids tested exercise were comprised aqueous nonaqueous basefluids, metal oxide particles, near-spherical elongated...
Plasmonic nanomaterials have the opportunity to considerably improve specificity of cancer ablation by i.v. homing tumors and acting as antennas for accepting externally applied energy. Here, we describe an integrated approach improved plasmonic therapy composed multimodal nanomaterial optimization computational irradiation protocol development. We synthesized polyethylene glycol (PEG)-protected gold nanorods (NR) that exhibit superior spectral bandwidth, photothermal heat generation per...
Thermal conductivities of two kinds Au nanoparticles were measured in water and toluene media. The soluble particles, 10–20 nm mean diameter, made with citrate stabilization showed thermal conductivity enhancement 5%–21% the temperature range 30–60 °C at a loading 0.000 26 (by volume). effect was 7%–14% for particles stabilized monolayer octadecanethiol even 0.011%. Comparatively lower observed larger diameter Ag significantly higher loading. Effective 9%, vanishing concentrations, points to...
A comprehensive model has been proposed to account for the large enhancement of thermal conductivity in nanofluids and its strong temperature dependence, which classical Maxwellian theory unable explain. The dependence on particle size, concentration, taken care simultaneously our treatment. While geometrical effect an increase surface area with a decrease rationalized using stationary model, accounts enhancement, moving developed from Stokes-Einstein formula explains effect. Predictions...
We report graphene composite membranes with nominal areas more than 25 mm(2) fabricated by transfer of a single layer CVD onto porous polycarbonate substrate. A combination pressure-driven and diffusive transport measurements provides evidence size-selective molecules through the membrane, which is attributed to low-frequency occurrence intrinsic 1-15 nm diameter pores in graphene. Our results present first step toward realization practical that use as selective material.
This paper describes a green method for the synthesis of graphenic material from cane sugar, common disaccharide. A suitable methodology was introduced to immobilize this on sand without need any binder, resulting in composite, referred as graphene composite (GSC). Raman spectroscopy confirmed that is indeed nature, having G and D bands at 1597 1338 cm–1, respectively. It effectively removes contaminants water. Here, we use rhodamine 6G (R6G) model dye chloropyrifos (CP) pesticide...
In view of a great demand for paper-based technologies, nonwettable fibrous substrates with excellent durability have drawn much attention in recent years. this context, the use cellulose nanofibers (CNFs), smallest unit cellulosic (5–20 nm wide and 500 to several microns length), design waterproof paper can be an economical smart approach. study, eco-friendly facile methodology develop multifunctional via fabrication fluoroalkyl functionalized CNFs aqueous medium is presented. This strategy...
Nanofluids have shown remarkable attraction in heat transfer community due to its reported enhanced thermal properties. One factor which can restrict nanofluids application is the increased viscosity value (compared classical predictions). Particle aggregation occurring was major reason for this observation. Even though majority of aqueous prepared literature were stabilized electrostatically by adjusting pH, studies on effect electrical double layer thus created and influence increase has...
This paper envisages a mechanism of heat conduction behind the thermal conductivity enhancement observed in graphene nanofluids. Graphene nanofluids have been prepared, characterized, and their was measured using transient hot wire method. The enhancements are substantial even at lower concentrations not predicted by classical Maxwell model. also shows strong temperature dependence which is unlike its carbon predecessors, nanotube (CNT) oxide It seen that magnitude in-between CNT...
Boiling heat transfer using nanofluids has been a subject of few investigations in the past years and incongruous results have reported literature regarding same. Conflicting explanations for deterioration pool boiling coefficient at higher concentrations (4–16wt%) presented by various researchers. Recently, works significant enhancement lower (0.32–1.25wt%) physical reasons this not explained. The present work is aimed removing these ambiguities. Experiments carried out stable water based...
Adding a small volume fraction of carbon nanotubes (CNTs) to liquid enhances the thermal conductivity significantly. Recent experimental findings report an anomalously wide range enhancement values that continue perplex research community and remain unexplained. In this paper we present theoretical model based on three-dimensional CNT chain formation (percolation) in base corresponding resistance network. The considers random orientation CNT-CNT interaction forming percolating chain....