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Direct Numerical Simulation and RANS Comparison of Turbulent Convective Heat Transfer in a Staggered Ribbed Channel With High Blockage

机译:高交错肋肋通道内湍流对流换热的直接数值模拟与RANS比较。

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摘要

A turbulent convective flow of an incompressible fluid inside a staggered ribbed channel with high blockage at Re_H≈4200 is simulated with direct numerical simulation (DNS) and Reynolds-averaged Navier-Stokes (RANS) techniques. The DNS results provide the reference solution for comparison of the RANS turbulence models. The k-ε realizable, k-ω SST, and v~2-f model are accurately analyzed for their strengths and weaknesses in predicting the flow and temperature field for this geometry. These three models have been extensively used in literature to simulate this configuration_and boundary conditions but with discordant conclusions upon their performance. The v~2-f model performs much better than the k-ε realizable while the k-ω SST model results to be inadequate.
机译:利用直接数值模拟(DNS)和雷诺平均Navier-Stokes(RANS)技术,模拟了在Re_H≈4200处具有高阻塞度的交错肋状通道内不可压缩流体的湍流对流。 DNS结果为比较RANS湍流模型提供了参考解决方案。在预测该几何形状的流场和温度场时,准确地分析了k-ε可实现,k-ωSST和v〜2-f模型的优缺点。这三种模型已在文献中广泛用于模拟这种构型和边界条件,但对其性能却得出不一致的结论。 v〜2-f模型的性能比可实现的k-ε好得多,而k-ωSST模型的结果不足。

著录项

  • 来源
    《Journal of Heat Transfer》 |2017年第2期|021701.1-021701.7|共7页
  • 作者

    Luca Marocco; Andrea Franco;

  • 作者单位

    Department of Energy, Politecnico di Milano, Milan 20156, Italy;

    Department of Energy, Politecnico di Milano, Milan 20156, Italy;

  • 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

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