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首页> 外文期刊>ISIJ international >Numerical Simulation of Heat Transfer during Microwave Heating of Magnetite
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Numerical Simulation of Heat Transfer during Microwave Heating of Magnetite

机译：磁铁矿微波加热传热的数值模拟。

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摘要

Numerical simulation of heat transfer during the microwave heating process of a one-dimensional (1-D) magnetite slab subjected to convective, radiative boundary conditions was performed. The governing equations representing the heating process in the slab were discretized using an explicit finite-difference approach, and a computer code was developed to predict the temperature distributions inside the slab. The heat generation from microwave irradiation dominates the initial temperature rise in the heating and the heat radiation heavily affects the temperature distribution, giving rise to a temperature peak in the predicted temperature profile. As heating continues, the temperature peak migrates inward. The microwave power level is crucial to obtain a high temperature increase rate in the initial heating period (i.e. < 60 s for magnetite). Microwave heating at 915 MHz exhibits better heating homogeneity than 2450 MHz due to larger microwave penetration depth. To minimize/avoid temperature non-uniformity during the microwave heating the optimization of the object dimension should be considered.
机译：对一维（1-D）磁铁矿平板在对流，辐射边界条件下的微波加热过程中的传热进行了数值模拟。使用显式有限差分法离散化了代表板坯加热过程的控制方程，并开发了计算机代码来预测板坯内部的温度分布。微波辐射产生的热量在加热过程中占主导地位，而热辐射严重影响温度分布，从而在预测温度曲线中产生温度峰值。随着加热的继续，温度峰值向内迁移。微波功率水平对于在初始加热期间（即磁铁矿<60 s）获得高的升温速率至关重要。由于更大的微波穿透深度，915 MHz的微波加热比2450 MHz具有更好的加热均匀性。为了最小化/避免微波加热期间的温度不均匀性，应考虑物体尺寸的优化。

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  • 来源
    《ISIJ international》 |2011年第6期|p.884-888|共5页
  • 作者

    Zhiwei PENG; Jiann-Yang HWANG; Matthew ANDRIESE; Wayne BELL; Xiaodi HUANG; Xinli WANG;

  • 作者单位

    Department of Materials Science and Engineering, Michigan Technological University, Houghton, Ml 49931, USA;

    Department of Materials Science and Engineering, Michigan Technological University, Houghton, Ml 49931, USA;

    Department of Materials Science and Engineering, Michigan Technological University, Houghton, Ml 49931, USA;

    Department of Materials Science and Engineering, Michigan Technological University, Houghton, Ml 49931, USA;

    Department of Materials Science and Engineering, Michigan Technological University, Houghton, Ml 49931, USA;

    School of Technology, Michigan Technological University, Houghton, Ml 49931, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    heat transfer; microwave processing; magnetite; heating homogeneity;

    机译：传播热量;微波处理;磁铁矿;加热均匀;

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