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Computational Thermal Sciences: An International Journal

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ISSN Печать: 1940-2503

ISSN Онлайн: 1940-2554

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NUMERICAL STUDY OF NATURAL CONVECTION HEAT TRANSFER PERFORMANCE IN AN INCLINED CAVITY WITH COMPLEX-WAVY-WALL: NANOFLUID AND RANDOM TEMPERATURE

Том 7, Выпуск 1, 2015, pp. 51-64
DOI: 10.1615/ComputThermalScien.2015013084
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Краткое описание

Natural convection of a nanofluid (NF) consisting of water and (Ag or TiO2) in an inclined enclosure cavity has been studied numerically; the left and right walls of the cavity have a complex-wavy geometry and are maintained at a low and high temperature (random temperature, based on the random function), respectively. Meanwhile, the upper and lower walls of the cavity are both flat and insulated. The governing equations are solved numerically using the finite volume. The complex-wavy-surface is modeled as the superimposition of two sinusoidal function approaches. Results are presented in the form of streamlines, isotherms, and average Nusselt number. In addition, a parametric study is carried out to examine explicitly the volume fraction effects of nanoparticles (NPs) (φ = 0.1, 0.2), the Rayleigh number (Ra = 103,104, 105), the inclination angle of the cavity (γ = 0°, 45°, 90°, 135°, 180°), types of temperature (constant, random), types of NF (Ag and TiO2), and the complex-wavy-surface configuration. The results reveal that NPs addition remarkably enhances heat transfer in the cavity, especially for φ = 0.2. Besides, the effect of inclination angle and type of temperature is more pronounced at higher Rayleigh number. Moreover, it is shown that the heat transfer performance can be optimized by tuning the wavy-surface geometry parameters.

ЦИТИРОВАНО В
  1. Bakhti Fatima Zohra, Si-Ameur Mohamed, A comparison of mixed convective heat transfer performance of nanofluids cooled heat sink with circular perforated pin fin, Applied Thermal Engineering, 159, 2019. Crossref

  2. Medebber Mohamed A., Retiel Noureddine, Numerical Study of Natural Convection in a Vertical Cylindrical Partially Annular, Mechanics and Mechanical Engineering, 22, 1, 2018. Crossref

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