THERMAL SCIENCE

International Scientific Journal

Vasu Velagapudi

,

Konijeti Rama Krishna

,

Chandra Sekhara Kumar Aduru

EMPIRICAL CORRELATIONS TO PREDICT THERMOPHYSICAL AND HEAT TRANSFER CHARACTERISTICS OF NANOFLUIDS

ABSTRACT
Nanofluids exhibits larger thermal conductivity due to the presence of suspended nanosized solid particles in them such as Al2O3, Cu, CuO,TiO2, etc. Varieties of models have been proposed by several authors to explain the heat transfer enhancement of fluids such as water, ethylene glycol, engine oil containing these particles. This paper presents a systematic literature survey to exploit the thermophysical characteristics of nanofluids. Based on the experimental data available in the literature empirical correlation to predict the thermal conductivity of Al2O3, Cu, CuO, and TiO2 nanoparticles with water and ethylene glycol as base fluid is developed and presented. Similarly the correlations to predict the Nusselt number under laminar and turbulent flow conditions is also developed and presented. These correlations are useful to predict the heat transfer ability of nanofluids and takes care of variations in volume fraction, nanoparticle size and fluid temperature. The improved thermophysical characteristics of a nanofluid make it excellently suitable for future heat exchange applications. .
KEYWORDS
nanofluids, thermal conductivity, heat transfer coefficient, laminar, turbulent
PAPER SUBMITTED: 2007-02-13
PAPER REVISED: 2007-07-11
PAPER ACCEPTED: 2007-09-21
DOI REFERENCE: https://doi.org/10.2298/TSCI0802027V
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2008, VOLUME 12, ISSUE Issue 2, PAGES [27 - 37]
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Empirical correlations to predict thermophysical and heat transfer characteristics of nanofluids

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