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Numerical Prediction and Analysis of Surface Transfer Coefficients on Moist Object During Heat and Mass Transfer Application

机译：传热传质过程中潮湿物体表面传递系数的数值预测与分析

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摘要

Convective surface transfer coefficients data for a moist object are not easily available from the literature and this coefficient is usually assumed to be constant in most studies. A three-dimensional (3D) numerical model is developed for prediction of heat and mass transfer coefficients on the surface of the rectangular moist object. A computational fluid dynamics tool is used for flow analysis at three different higher velocities. The spatial distribution of heat and mass transfer coefficients is estimated at the surfaces of the object. The effect of constant and variable surface transfer coefficient is analyzed through transient 3D simultaneous heat and mass transfer solutions of convective drying. The numerical results are compared with experimental results. Good agreement was found with the experimental results when the numerical solution is considered with variable heat transfer coefficient. The numerical solutions with constant heat transfer coefficient gives overestimated results. A new set of Nusselt number and Sherwood number correlations is developed from a numerical model, and these correlations are expected to be useful for drying industries.
机译：湿物体的对流表面传递系数数据不易从文献中获得，并且在大多数研究中通常假定该系数为常数。建立了三维（3D）数值模型，用于预测矩形潮湿物体表面上的传热和传质系数。计算流体动力学工具用于三种不同更高速度下的流动分析。在物体表面估计传热和传质系数的空间分布。通过对流干燥的瞬态3D同时传热和传质解决方案，分析了恒定和可变表面传递系数的影响。将数值结果与实验结果进行比较。当考虑传热系数可变的数值解时，与实验结果吻合良好。具有恒定传热系数的数值解给出了高估的结果。通过数值模型开发了一组新的Nusselt数和Sherwood数相关性，并且这些相关性有望用于干燥行业。

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  • 来源
    《Heat Transfer Engineering》 |2016年第4期|53-63|共11页
  • 作者

    V. P. CHANDRAMOHAN;

  • 作者单位

    Department of Mechanical Engineering, National Institute of Technology Warangal, Warangal, India,National Institute of Technology Warangal, Warangal, Telangana, India 506 004;

  • 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);
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  • 正文语种 eng
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