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An investigation of flow reversal of mixed convection in a three dimensional rectangular channel with a finite length

机译：有限长度三维矩形通道内混合对流逆流的研究

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摘要

An investigation of flow reversal of mixed flow in a three dimensional channel is studied numerically. At a high Richardson number, natural convection dominates the flow and thermal fields of mixed convection. Behaviors of the residual mass flow rate produced by the difference of the strength of natural and forced convections coexisting in mixed convection are worthy to be examined deeply for industrial applications. Due to the necessity of considering the fluid compressibility, methods of the Roe scheme, preconditioning and dual time stepping are adopted to solve governing equations. The results show that at a high Richardson number situation, via the outlet in large quantities of fluids are sucked into the channel from the outside that causes the flow and thermal fields in the channel to be unsteady and vice versa.
机译：数值研究了三维通道内混合流的逆向流动。理查森数高时，自然对流主导混合对流的流场和热场。混合对流中自然对流和强制对流的强度差异所产生的残余质量流量的行为，值得在工业应用中进行深入研究。由于必须考虑流体的可压缩性，因此采用Roe方案，预处理和双重时间步长法求解控制方程。结果表明，在高Richardson数情况下，大量的流体通过出口从外部被吸入通道，这导致通道中的流场和热场不稳定，反之亦然。

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  • 作者

    Wu-Shung Fu; Yu-Chih Lai; Yun Huang; Kuan-Lan Liu;

  • 作者单位

    Department of Mechanical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan, ROC;

    Department of Mechanical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan, ROC;

    Department of Mechanical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan, ROC;

    Department of Mechanical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan, ROC;

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

    Reversal flow; Mixed convection; Three dimensional channel;

    机译：逆流;混合对流;三维通道;

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