An Investigation of Natural Convection-Radiation Combined Heat Transfer

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  • HUANG Kai
    Graduate School of Engineering, Utsunomiya University
  • AKIYAMA Mitsunobu
    Graduate School of Engineering, Utsunomiya University Faculty of Engineering, Utsunomiya University
  • NINOMIYA Nao
    Graduate School of Engineering, Utsunomiya University Faculty of Engineering, Utsunomiya University

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  • 222 ガス輻射と自然対流の共存熱伝達
  • ガス フクシャ ト シゼン タイリュウ ノ キョウゾン ネツ デンタツ

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Abstract

Heat transfer by natural convection and radiation in participating fluids enclosed in a square enclosure is numerically simulated. The continuity, momentum and energy equations are solved by the control volume method while the radiative heat transfer is analyzed by the Monte Carlo simulation. The Monte Carlo simulation is linked with the SIMPLE algorithm for solving the Navier-Stokes equations. therefore all variables such as U, V. and T are solved each time the radiative heat flux is updated. As the result, the influences of thermal radiation on the flow and temperature fields are found significant. The radiative heat transfer is dominant. The convection is also strengthened. These features become clear with higher optical thickness.

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