Analytical prediction of forced convective heat transfer of fluids embedded with nanostructured materials (nanofluids) |
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| Authors: | V Vasu K Rama Krishna A C S Kumar |
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| Institution: | (1) Department of Production Engineering, V R Siddhartha Engineering College, Vijayawada, 520 007, India;(2) Freshmen Engineering Department, K L College of Engineering, Vaddeswaram, 522 502, India;(3) Department of Mechanical Engineering, Jawaharlal Nehru Technological University, Hyderabad, 500 072, India |
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| Abstract: | Nanofluids are a new class of heat transfer fluids developed by suspending nanosized solid particles in liquids. Larger thermal
conductivity of solid particles compared to the base fluid such as water, ethylene glycol, engine oil etc. significantly enhances
their thermal properties. Several phenomenological models have been proposed to explain the anomalous heat transfer enhancement
in nanofluids. This paper presents a systematic literature survey to exploit the characteristics of nanofluids, viz., thermal
conductivity, specific heat and other thermal properties. An empirical correlation for the thermal conductivity of Al2O3 + water and Cu + water nanofluids, considering the effects of temperature, volume fraction and size of the nanoparticle is
developed and presented. A correlation for the evaluation of Nusselt number is also developed and presented and compared in
graphical form. This enhanced thermophysical and heat transfer characteristics make fluids embedded with nanomaterials as
excellent candidates for future applications.
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| Keywords: | Nanofluids thermal properties conductivity models empirical relation |
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