Techniques for the Measurement of Thermal Conductivity of Nanofluids-An Appraisal Based on Published Literature and Indigenous Experiments
Gayatri Paul1, Manoj Chopkar2, Indranil Manna3 and Prasanta Kumar Das4
1MS Student, Department of Metallurgical & Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721 302, India.
gayatri.paul@gmail.com
2Lecturer, Department of Metallurgy, National Institute of Technology, Raipur 492 010, Chhattisgarh, India.
manoj.chopkar@gmail.com
3Professor, Department of Metallurgical & Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721 302, India.
imanna@metal.iitkgp.ernet.in
4Professor, Department of Mechanical Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721 302, India.
pkd@mech.iitkgp.ernet.in
ABSTRACT
Several methods have been developed for measuring the thermal conductivity of nanofluids. These are transient hot-wire method, thermal comparator method, thermal constants analyzer technique, steady-state parallel-plate method, cylindrical cell method, temperature oscilloscope technique, and 3ω technique. In this paper a critical review of the different techniques being used for the measurement of thermal conductivity of nanofluids has been presented. Also, a unique thermal conductivity measurement device based on the thermal comparator principle, developed by the present authors has been described and the experimental results for ethylene glycol and water based nano-ceramic nanofluids have been elaborated. Results show a maximum increase of upto 2 times of the thermal conductivity ratio.
Keywords: Nanofluid, Measurement techniques,
Thermal conductivity, Thermal comparator.
Full Text (PDF)
|
