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Heat Transfer Research
インパクトファクター: 0.404 5年インパクトファクター: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN 印刷: 1064-2285
ISSN オンライン: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.2011002105
pages 379-402

Two-Dimensional Laminar Fluid Flow and Heat Transfer over a Backward-Facing Step: Effects of Reynolds and Prandtl Numbers

Harsh Chaudhary
Department of Chemical Engineering, Indian Institute of Technology Roorkee, 247 667, India
Amit Kumar Dhiman
Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee - 247 667, India

要約

In this study, the two-dimensional fluid flow and heat transfer over a backward-facing step have been investigated in the laminar steady flow regime. The numerical simulations are carried out for the following range of conditions: the Reynolds number from 1 to 200 and the Prandtl number from 0.71 to 100. Extensive results have been presented for flow and heat transfer via streamline, vorticity magnitude, pressure and temperature profiles. The present results are in excellent agreement with the reported experimental/numerical results available in the open literature. The wake or recirculation length increases with increasing value of the Reynolds number. The average Nusselt number increases with increasing value of the Reynolds number and/or Prandtl number. Finally, simple expressions of the recirculation length, peak Nusselt number, and average Nusselt number for the bottom (heated) wall are obtained for the range of conditions covered here.


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