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Analytical prediction of forced convective heat transfer of fluids embedded with nanostructured materials (nanofluids)

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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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Authors and Affiliations

  1. Department of Production Engineering, V R Siddhartha Engineering College, Vijayawada, 520 007, India

    V. Vasu

  2. Freshmen Engineering Department, K L College of Engineering, Vaddeswaram, 522 502, India

    K. Rama Krishna

  3. Department of Mechanical Engineering, Jawaharlal Nehru Technological University, Hyderabad, 500 072, India

    A. C. S. Kumar

Authors
  1. V. Vasu
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  2. K. Rama Krishna
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  3. A. C. S. Kumar
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Correspondence to V. Vasu.

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Vasu, V., Rama Krishna, K. & Kumar, A.C.S. Analytical prediction of forced convective heat transfer of fluids embedded with nanostructured materials (nanofluids). Pramana - J Phys 69, 411–421 (2007). https://doi.org/10.1007/s12043-007-0142-1

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  • DOI: https://doi.org/10.1007/s12043-007-0142-1

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