Dependence of Granular Heat Transfer Performance on Vibration Characteristics in Vibrationally Fluidized Beds

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کد مقاله : 1052-ISAV (R1)
1طراحی کاربردی، دانشکده مکانیک، دانشگاه شیراز
2بخش مهندسی مکانیک جامدات، دانشکده مکانیک، دانشگاه شیراز
Heat transfer in granular materials has many industrial applications, including food production, solar energy harvesting and nuclear engineering. The present research studies the effect of vibration characteristics on granular heat transfer in a vibrationally fluidized bed of particles using a three-dimensional discrete element method. The bed is heated by transferring a constant heat flux from its bottom wall. It was found that vibrations generally had two influences: first, particles reached a higher average temperature, and second, they attained a more uniform temperature distribution. The particles average temperature generally increased by increasing vibration amplitude. However, the best temperature uniformity occurred in an optimal set of amplitudes and frequencies. As vibration intensified, heating cycles were generated, causing the particles temperature increases faster since the heat is conducted to the particles directly from the heated bottom wall. The generation of heating cycles had a fundamental role on controlling granular heat transfer in vibrating beds.
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