Thermal Conductivity Enhancement of Coaxial Carbon@Boron Nitride Nanotube Arrays

2017 ◽  
Vol 9 (17) ◽  
pp. 14555-14560 ◽  
Author(s):  
Lin Jing ◽  
Majid Kabiri Samani ◽  
Bo Liu ◽  
Hongling Li ◽  
Roland Yingjie Tay ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Boron Nitride ◽  
Thermal Conductivity Enhancement ◽  
Nanotube Arrays ◽  
Boron Nitride Nanotube ◽  
Conductivity Enhancement

Molecular Dynamic Simulation of Thermal Conductivity of Electrically Insulating Thermal Nano-Oil

2012 ◽  
Author(s):  
K. Raji ◽  
C. B. Sobhan ◽  
Jaime Taha-Tijerina ◽  
T. N. Narayanan ◽  
P. M. Ajayan
Keyword(s):  
Thermal Conductivity ◽  
Molecular Dynamics ◽  
Boron Nitride ◽  
Hexagonal Boron Nitride ◽  
Harmonic Oscillation ◽  
High Heat ◽  
Thermal Conductivity Enhancement ◽  
Conductivity Enhancement ◽  
High Heat Transfer ◽  
Electrical Transformers

In applications such as coolants in electrical devices, in addition to high heat transfer capabilities, the cooling fluids are required to have low electrical conductivity also. As nanoparticle suspensions (nanofluids) show excellent thermal performance due to enhanced thermal conductivity, it would be advantageous to evolve nanofluid-coolants, which are electrically insulating also, for such applications. A theoretical analysis of one such suspension is performed in the present work, to evaluate the thermal conductivity enhancement due to the presence of nanoparticles in the base fluid. The nanofluid analyzed is a suspension of hexagonal boron nitride (h-BN) in mineral oil, for application as a cooling fluid in electrical transformers. The thermal conductivity of the boron nitride suspension is computed using equilibrium Molecular Dynamics (MD) simulations followed by the application of the Green-Kubo auto correlation function. The Lennard–Jones potentials and simple harmonic oscillation potentials are used as the intermolecular potentials to appropriately describe the various atomic and molecular interactions in the boron nitride suspension. The molecular dynamics simulations are performed using LAMMPS software. The computational results are benchmarked with experimental findings on the thermal conductivity enhancement in the suspension at various temperatures and concentrations of nanoparticles, obtained using a transient measurement technique.

scholarly journals Thermal conductivity enhancement of carbon@ carbon nanotube arrays and bonded carbon nanotube network

2019 ◽  
Vol 6 (8) ◽  
pp. 085616 ◽  
Author(s):  
Majid Kabiri Samani ◽  
Congxiang Lu ◽  
Kong Qinyu ◽  
Narjes Khosravian ◽  
George Chen ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotube ◽  
Thermal Conductivity Enhancement ◽  
Nanotube Arrays ◽  
Conductivity Enhancement ◽  
Carbon Nanotube Arrays ◽  
Carbon Nanotube Network

Experimental Investigation on Thermophysical Performance of BN/EG Nanofluids Influenced by Dispersant

2015 ◽  
Vol 757 ◽  
pp. 7-12 ◽  
Author(s):  
Jian Feng Guo ◽  
Zhi Qing Guo ◽  
Xin Feng Wang ◽  
Yan Jiao Li ◽  
Qiu Juan Lv
Keyword(s):  
Thermal Conductivity ◽  
Experimental Investigation ◽  
Boron Nitride ◽  
Experimental Results ◽  
Thermal Conductivity Enhancement ◽  
Step Method ◽  
Conductivity Enhancement ◽  
The Stability ◽  
Severe Deterioration

Boron nitride/ethylene alcohol (BN/EG) nanofluid was synthesized by two-step method. The effect of dispersant on stability, viscosity and thermal conductivity enhancement was investigated. The experimental results indicated that the addition of anionic dispersant (SHMP) and catioic dispersant (CTAB) will induce the severe deterioration of stability of BN/EG nanofluids. PVP, which belonging to non-ionic dispersant, can improve the stability and fluidity obviously besides keeping the enhancement of thermal conductivity.

Sign in / Sign up

Export Citation Format

Share Document