978-620-2-68274-9

Transport Properties and Freeze-Thaw Characteristics of Nanofluids

Measurements of Properties and Computational Modeling of Freeze-Thaw

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Summary:

This book presents the rheological and thermal properties and the freeze-thaw characteristics of nanofluids. Nanofluids are dispersions of nano-scale particles (< 100 nm) in a base fluid such as water and glycols. In cold regions, a mixture of 60% ethylene glycol and water by mass (60:40 EG/W) is normally used as the heat transfer fluid due to its low freezing point. Rheological properties of aluminum oxide nanofluid in the EG/W base fluid were investigated and new correlations for viscosity as a function of temperature and particle concentration were developed. From the specific heat experiments on zinc oxide nanofluid a new equation was developed. The thermal conductivity of silicon dioxide nanofluid was measured. A new correlation for thermal conductivity as a function of particle concentration, size, base fluid and particle properties and temperature was proposed, considering the Brownian motion of nanoparticles. Freeze-thaw characteristics of copper oxide nanoparticle dispersions in water were studied experimentally and computationally for a freeze-thaw cycle. The freezing rate, agglomeration of nanoparticles and the effect on the freezing point of nanofluid were summarized.

Author:

Bhaskar Sahoo

Biographie:

Mr. Bhaskar Sahoo received his MS degree in geological engineering at the University of Alaska Fairbanks, USA and is currently pursuing a Ph.D. degree at York University, Canada. Dr. Debendra Das was the advisor of Mr. Sahoo and the past Chairman of mechanical engineering department at the University of Alaska Fairbanks. 

Author:

DEBENDRA DAS

Biographie:

Number of Pages:

92

Book language:

English

Published On:

2020-07-22

ISBN:

978-620-2-68274-9

Publishing House:

LAP LAMBERT Academic Publishing

Keywords:

nanofluids, freeze, thaw, viscosity, thermal conductivity, specific heat, ethylne glycol

Product category:

TECHNOLOGY / Engineering / General