Thermal Conductivity of Nanofluid with Magnetic Nanoparticles

PIERS Online ◽  
2009 ◽  
Vol 5 (3) ◽  
pp. 231-234 ◽  
Author(s):  
Tsung-Han Tsai ◽  
Long-Sheng Kuo ◽  
Ping-Hei Chen ◽  
Chin-Ting Yang
Keyword(s):  
Thermal Conductivity ◽  
Magnetic Nanoparticles

Thermal Conductivity Enhancement of Room Temperature Ionic Liquids (RTILs) With Various Magnetic Nanoparticles

2012 ◽  
Author(s):  
N. Y. Jagath B. Nikapitiya ◽  
Hyejin Moon
Keyword(s):  
Thermal Conductivity ◽  
Ionic Liquids ◽  
Magnetic Nanoparticles ◽  
Magnetic Fields ◽  
Room Temperature ◽  
Particle Concentration ◽  
Thermal Conductivity Enhancement ◽  
Room Temperature Ionic Liquids ◽  
Conductivity Enhancement ◽  
Magnetic Nanofluids

This paper reports an experimental study of thermal conductivity of room temperature ionic liquids (RTILs) based magnetic nanofluids. Various magnetic nanoparticles of metal oxides with high thermal conductivity, such as CuO, Al2O3, Fe3O4 and Carbon Nano Tubes (CNTs), were used to prepare magnetic nanofluids, while RTIL, trihexyl (tetradecyl) posphonium dicyanamide was used as the base fluid. Two major parameters that affect to the thermal conductivity enhancement of fluids were investigated. The effect of particle concentration and external magnetic fields were tested. It was observed that the magnetic nanofluids thermal conductivities increase with increment of particle concentration and external magnetic field parallel to the temperature gradient. Besides, it was observed that under higher magnetic fields, thermal conductivity enhancement tends to approach a saturation state. Surfactant was used to disperse magnetic nanoparticles within the RTILs. The transient hot wire method was used for this investigation.

Numerical Simulation on Heat Transfer in a Novel Combined Therapy of Nano-Cryosurgery and RF Hyperthermia

2012 ◽  
Author(s):  
Zhong-Shan Deng ◽  
Jing Liu
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Numerical Simulation ◽  
Magnetic Nanoparticles ◽  
Treatment Efficacy ◽  
Treatment Process ◽  
Combined Therapy ◽  
Target Tissue ◽  
Tumor Treatment ◽  
Numerical Investigations

In this study, a novel combined therapy of nano-cryosurgery and RF induced nano-hyperthermia was proposed, with the purpose of improving tumor treatment efficacy. To better understand the mechanisms of enhancement on freezing and heating by introducing magnetic nanoparticles with high thermal conductivity during the combined therapy of nano-cryosurgery and RF hyperthermia, a series of numerical investigations were performed. The results indicate that the combined therapy of nano-cryosurgery and RF hyperthermia can serve as an applicable way to flexibly control the size and shape of lethal freezing/heating areas, which will help selectively ablate the target tissue and then optimize the thermal treatment process for tumor.

A STUDY OF THE Pb PRECIPITATION IN NaCl FROM THERMAL CONDUCTIVITY EXPERIMENTS

1981 ◽  
Vol 42 (C6) ◽  
pp. C6-893-C6-895
Author(s):  
M. Locatelli ◽  
R. Suchail ◽  
E. Zecchi
Keyword(s):  
Thermal Conductivity
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