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Natural convection combined with surface radiation in a rotating cavity with an element of variable volumetric heat generation

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  • Mikhailenko, Stepan A.
  • Sheremet, Mikhail A.
  • Pop, Ioan

Abstract

Thermogravitational convection and surface radiation in a rotating chamber with an element of variable volumetric thermal generation has been studied. The analyzed chamber has two thermally-insulated horizontal borders, two isothermal vertical walls of the low temperature and variable heat-generated element on the bottom border. The cavity rotates with a constant angular velocity. Mathematical model has been formulated in non-dimensional stream function and vorticity functions. The important equations have been worked out by the finite difference technique on uniform grid. The impacts of the Taylor number, surface emissivity, and heat source volumetric heat generation oscillation frequency on heat and mass transfer have been investigated. It has been found that the surface emissivity and the volumetric heat generation oscillation frequency can improve the heat transfer in a rotating cavity. A rise of the surface emissivity illustrates the total energy transport enhancement and a diminution of the average heater temperature, while a rise of the volumetric heat generation oscillation frequency characterizes a reduction of the average heater temperature.

Suggested Citation

  • Mikhailenko, Stepan A. & Sheremet, Mikhail A. & Pop, Ioan, 2020. "Natural convection combined with surface radiation in a rotating cavity with an element of variable volumetric heat generation," Energy, Elsevier, vol. 210(C).
    • Handle: RePEc:eee:energy:v:210:y:2020:i:c:s0360544220316510
    DOI: 10.1016/j.energy.2020.118543
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    References listed on IDEAS

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    1. 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.
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