scholarly journals Synthesis of silver nanoparticle decorated multiwalled carbon nanotubes-graphene mixture and its heat transfer studies in nanofluid

AIP Advances ◽  
2013 ◽  
Vol 3 (1) ◽  
pp. 012111 ◽  
Author(s):  
Tessy Theres Baby ◽  
Ramaprabhu Sundara
Keyword(s):  
Heat Transfer ◽  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Silver Nanoparticle ◽  
Multiwalled Carbon

scholarly journals Analysis of Multiwalled Carbon Nanotubes Porosimetry And Their Thermal Conductivity with Ionic Liquid-Based Solvents

2020 ◽  
Vol 77 (2) ◽  
pp. 63-75
Author(s):  
Balaji Bakthavatchalam ◽  
Khairul Habib ◽  
R. Saidur ◽  
Nagoor Basha Shaik ◽  
Turnad Lenggo Ginta
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Ionic Liquid ◽  
Multiwalled Carbon Nanotubes ◽  
Experimental Investigations ◽  
Step Method ◽  
Multiwalled Carbon ◽  
Heat Transfer Fluids ◽  
The Impact

The suspension of nanoparticles with common heat transfer fluids like Ethylene glycol and water yields nanofluid exhibits superior thermal properties than their host fluids. Ionic liquids have the potential to demonstrate remarkable thermophysical properties (especially thermal conductivity) that ordinary nanofluids cannot achieve. On the other hand, the quantity and structure of nanoparticles porosity affects the nanofluid’s thermal conductivity considerably. Various investigations have revealed the improved thermophysical characteristicts of Multiwalled Carbon nanotubes (MWCNTs) nanofluids containing common solvents or base fluids. However, only limited studies are available on the impact of thermal conductivity in Ionic liquid-based nanofluids (Ionanofluids) owing to their high cost and viscosity. Ultrasonication technique is employed in preparing the three different Ionanofluids containing 0.5 Wt.% via the two-step method to achieve a greater stability and thermal conductivity without utilizing surfactants. Experimental investigations are performed to boost the thermal conductivity of MWCNT/Propylene glycol nanofluid using 1,3-dimethyl imidazolium dimethyl phosphate [Mmim][DMP], 1-ethyl-3-methyl imidazolium octyl sulfate [Emim][OSO4] and 1-ethyl-3-methyl imidazolium diethyl phosphate [Emim][DEP] at a temperature ranging from 295 K to 355 K. The acquired results illustrated that the thermal conductivity of MWCNT Ionanofluids incorporated with [Mmim][DMP], [Emim][OSO4] and [Emim][DEP] increased by 37.5%, 5% and 2% respectively. This unique class of Ionanofluids shows incredible capacity for use in high temperature applications as conventional heat transfer fluids.

scholarly journals Homogeneous and Multiphase Analysis of Nanofluids Containing Nonspherical MWCNT and GNP Nanoparticles Considering the Influence of Interfacial Layering

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 277
Author(s):  
Tehmina Ambreen ◽  
Arslan Saleem ◽  
Cheol Woo Park
Keyword(s):  
Heat Transfer ◽  
Carbon Nanotubes ◽  
Reynolds Number ◽  
Multiwalled Carbon Nanotubes ◽  
Convective Heat Transfer Coefficient ◽  
Reynolds Numbers ◽  
Experimental Investigations ◽  
Maximum Deviation ◽  
Multiwalled Carbon ◽  
Computational Approaches

The practical implication of nanofluids is essentially dependent on their accurate modelling, particularly in comparison with the high cost of experimental investigations, yet the accuracy of different computational approaches to simulate nanofluids remains controversial to this day. Therefore, the present study is aimed at analysing the homogenous, multiphase Eulerian–Eulerian (volume of fluid, mixture, Eulerian) and Lagrangian–Eulerian approximation of nanofluids containing nonspherical nanoparticles. The heat transfer and pressure drop characteristics of the multiwalled carbon nanotubes (MWCNT)-based and multiwalled carbon nanotubes/graphene nanoplatelets (MWCNT/GNP)-based nanofluids are computed by incorporating the influence of several physical mechanisms, including interfacial nanolayering. The accuracy of tested computational approaches is evaluated by considering particle concentration and Reynolds number ranges of 0.075–0.25 wt% and 200–470, respectively. The results demonstrate that for all nanofluid combinations and operational conditions, the Lagrangian–Eulerian approximation provides the most accurate convective heat transfer coefficient values with a maximum deviation of 5.34% for 0.25 wt% of MWCNT–water nanofluid at the largest Reynolds number, while single-phase and Eulerian–Eulerian multiphase models accurately estimate the thermal fields of the diluted nanofluids at low Reynolds numbers, but overestimate the results for denser nanofluids at high Reynolds numbers.

Silver nanoparticle decorated polyaniline/multiwalled super-short carbon nanotube nanocomposites for supercapacitor applications

RSC Advances ◽  
2016 ◽  
Vol 6 (69) ◽  
pp. 65012-65019 ◽  
Author(s):  
Li Tang ◽  
Fang Duan ◽  
Mingqing Chen
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Multiwalled Carbon Nanotubes ◽  
Silver Nanoparticle ◽  
Multiwalled Carbon ◽  
Cut Method ◽  
Short Carbon ◽  
Supercapacitor Applications ◽  
Closed Pore

In order to increase the utilization of the closed pore volumes of CNTs, multilayer super-short carbon nanotubes (SSCNTs) have been synthesized by tailoring the raw multiwalled carbon nanotubes (MWCNTs) with a simple ultrasonic oxidation-cut method.

Effect of Multiwalled Carbon Nanotubes On Mechanical Properties of Concrete

2012 ◽  
Vol 2 (6) ◽  
pp. 166-168 ◽  
Author(s):  
Dr.T.Ch.Madhavi Dr.T.Ch.Madhavi ◽  
◽  
Pavithra.P Pavithra.P ◽  
Sushmita Baban Singh Sushmita Baban Singh ◽  
S.B.Vamsi Raj S.B.Vamsi Raj ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Multiwalled Carbon
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