A5100703448- Heat Transfer and Boiling Studies
- Heat Transfer and Optimization
- Refrigeration and Air Conditioning Technologies
- Silicon Nanostructures and Photoluminescence
- Nanowire Synthesis and Applications
- Fluid Dynamics and Vibration Analysis
- Wind and Air Flow Studies
- Near-Field Optical Microscopy
- Quantum Dots Synthesis And Properties
- Heat transfer and supercritical fluids
- Heat Transfer Mechanisms
- Thin-Film Transistor Technologies
- Fluid Dynamics and Turbulent Flows
- Supercapacitor Materials and Fabrication
- Fluid Dynamics and Thin Films
- Luminescence Properties of Advanced Materials
Indian Institute of Technology Roorkee
2015-2025
Boiling heat transfer enhancement is influenced by the surface distinctiveness of boiling region. Porous being widely used to enhance in industry. An experimental study carried out investigate characteristics pool for different fluid, namely, pure refrigerant (R-134a) and quasi-azeotropic mixture (R-410A). The test performed on a thin porous layer over copper tube placed horizontal at saturation temperature 7°C also determine its potential application flooded evaporators. diameter coated was...
Thin silicon solar cells can be a low‐cost effective photo‐conversion device, if the device efficiently absorb spectrum. Herein, new lithography‐free technique is developed for fabrication of quasiperiodic inverted‐pyramids arrays (SiIPAs), which show high‐light‐trapping phenomenon in ultraviolet–visible—near‐infrared (300–2000 nm). Fabricated SiIPA samples significant reduction reflectance (3%) absorption band (300–1000 A unique additional 33–44% compared to planar observed sub‐bandgap...
Silica nano/microparticles have generated significant interest for the past decades, emerging as a versatile material with wide range of applications in photonic crystals, bioimaging, chemical sensors, and catalysis. This study focused on synthesizing silica ranging from 20 nm to 1.2 μm using Stöber modified methods. The particles exhibited photoluminescence emission across UV-visible range, specifically UV (∼290, ∼327, ∼339, ∼377 nm), blue (∼450 green (∼500 yellow (∼576 red (∼634 nm)...
Flow and heat transfer of non‐Newtonian power‐law fluids over an inclined square cylinder placed inside a channel are studied numerically at low Reynolds numbers. In particular, calculations carried out for number (Re) = 1–40; index (n) 0.4–1 blockage ratio ( β ) 12.5–50% Prandtl (Pr) 50. An increase in results the total drag coefficient decrease wake length. The Strouhal root mean value lift with increasing fixed values index. average Nusselt increases and/or ratio. maximum enhancement is...
This paper presents the experimental analysis of partially condensed refrigerant R-32 in an adiabatic straight capillary tube. The test section is tested for variation mass flow rate different inlet conditions. tube selected a diameter 1.12 mm, 1.27 and 1.52 length 1000 1500 2000 mm. pressures are 15.85 bar, 16.55 17.24 bar. All data taken steady-state choked Buckingham π theorem applied to find out correlation nondimensional analyses.
Correction for ‘Nucleotide(s)-mediated simultaneous N, P co-doped reduced graphene oxide (N, P-rGO) porous nanohybrids as high-performance electrode materials designing sustainable binder-free high-voltage (2.8 V) aqueous symmetric supercapacitors and electrochemical sensors’ by Ikrar Ahmad et al. , Sustainable Energy Fuels 2022, https://doi.org/10.1039/d2se00666a.
The experimental investigation was carried out for the spiral coiled capillary tube having a pitch of 32 mm, 48 and 64 mm to study mass flow rate R32. A wooden pattern used get shape tube. Three patterns were prepared three different pitches. convolutions are calculated length 1000 1500 2000 mm. variation in all pitches studied, results shown on graph. effect inlet pressure degree subcooling observed. From data comparison, it can be concluded that if increases from diameters similar...