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Numerical simulation of nanofluid application in a C-shaped chaotic channel: A potential approach for energy efficiency improvement

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  • Bahiraei, Mehdi
  • Hangi, Morteza

Abstract

This study aims to evaluate the energy efficiency of nanofluid as a heat transfer fluid in a chaotic channel. To this end, hydrothermal characteristics of the water–Al2O3 nanofluid are numerically investigated in C-shaped and straight channels using single- and two-phase methods and then, the results are compared with each other. In the C-shaped channel, heat transfer and pressure drop show higher values in comparison with the straight channel, which is due to intense mixing in the chaotic geometry, such that the velocity and temperature contours in the C-shaped channel are more uniform than those in the straight one. Using the two-phase method, the concentration distribution is obtained non-uniform at the cross section of the straight channel, while intense mixing in the C-shaped channel makes distribution of the nanoparticles uniform. In comparison with water, using the nanofluid through both channels presents higher heat transfer and pressure drop. However, merit of using the nanofluid in the C-shaped channel is greater than that in the straight one. In this regard, simultaneous application of nanofluids, as heat transfer fluids, and chaotic channel, as a modified geometry, can result in not only higher energy efficiency, but also preventing nanoparticles agglomeration due to the intense mixing.

Suggested Citation

  • Bahiraei, Mehdi & Hangi, Morteza, 2014. "Numerical simulation of nanofluid application in a C-shaped chaotic channel: A potential approach for energy efficiency improvement," Energy, Elsevier, vol. 74(C), pages 863-870.
    • Handle: RePEc:eee:energy:v:74:y:2014:i:c:p:863-870
    DOI: 10.1016/j.energy.2014.07.061
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    References listed on IDEAS

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    Cited by:

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    2. Garoosi, Faroogh & Hoseininejad, Faraz & Rashidi, Mohammad Mehdi, 2016. "Numerical study of natural convection heat transfer in a heat exchanger filled with nanofluids," Energy, Elsevier, vol. 109(C), pages 664-678.
    3. Rashidi, S. & Bovand, M. & Abolfazli Esfahani, J., 2015. "Structural optimization of nanofluid flow around an equilateral triangular obstacle," Energy, Elsevier, vol. 88(C), pages 385-398.
    4. Bazri, Shahab & Badruddin, Irfan Anjum & Naghavi, Mohammad Sajad & Bahiraei, Mehdi, 2018. "A review of numerical studies on solar collectors integrated with latent heat storage systems employing fins or nanoparticles," Renewable Energy, Elsevier, vol. 118(C), pages 761-778.
    5. Mamourian, Mojtaba & Milani Shirvan, Kamel & Mirzakhanlari, Soroush, 2016. "Two phase simulation and sensitivity analysis of effective parameters on turbulent combined heat transfer and pressure drop in a solar heat exchanger filled with nanofluid by Response Surface Methodol," Energy, Elsevier, vol. 109(C), pages 49-61.
    6. Anand, Vishal, 2015. "Entropy generation analysis of laminar flow of a nanofluid in a circular tube immersed in an isothermal external fluid," Energy, Elsevier, vol. 93(P1), pages 154-164.

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