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Conduction in composite slabs: Reliability of 1-D and 2-D calculations

机译:复合板中的传导:一维和二维计算的可靠性

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摘要

In this paper, dimensional dependence of heat transfer is critically assessed for a solid slab having inserts of dissimilar material. The steady state two-dimensional analysis has been performed using the commercial software FLUENT 6.3 to get an idea about the feasibility of one-dimensional calculation for practical purpose. Comparisons are shown between 1-D and 2-D approaches to quantify the percentage error in calculations of heat transfer. The diamond shaped insertion is found to have the maximum deviation from the one-dimensional calculation due to the approximation taken during integration as the area under consideration is not perpendicular to the direction of heat flow. 1-D approach differs from the results of 2-D calculations as the thermal conductivity of the material inserted in the cavity deviates from the thermal conductivity of the original slab material and the same is the case as volume fraction of intrusion increases. Efforts have also been made to identify optimum shape and size of the inserts.
机译:在本文中,对于带有异种材料插入物的实心板,对传热的尺寸依赖性进行了严格评估。使用商业软件FLUENT 6.3进行了稳态二维分析,以了解一维计算在实际应用中的可行性。比较了1-D和2-D方法,以量化传热计算中的百分比误差。由于所考虑的区域不垂直于热流方向,因此由于积分过程中的近似值,发现菱形插入物与一维计算具有最大偏差。一维方法不同于二维计算的结果,这是因为插入空腔中的材料的热导率与原始平板材料的热导率不同,并且随着侵入体积分数的增加,情况也是如此。还努力确定插入件的最佳形状和尺寸。

著录项

  • 来源
    《Energy and Buildings》 |2013年第10期|242-247|共6页
  • 作者单位

    Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 119077, Singapore;

    Department of Chemical Engineering, National Institute of Technology, Durgapur 721302, India;

    Department of Mechanical Engineering, National Institute of Technology, Rourkela 769008, India;

    Department of Mechanical Engineering, National Institute of Technology, Rourkela 769008, India;

    Department of Mechanical Engineering, Indian Institute of Technology, Kharagpur 721302, India;

  • 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

    Conduction; Heat flux; Inserts; CFD;

    机译:传导热通量;插入;差价合约;

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