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Spiral Coil Inserts for Heat Transfer Enhancement in a Parallel-plate Channel

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Author

  • Xue-Li Leng
  • Guan-Min Zhang
  • Yu-Feng Tang
  • Lin-Cong Luo
  • Zan Wu
  • Lian-Xiang Ma
  • Wei Li

Summary, in English

The flow fields and heat transfer characteristics in a parallel-plate channel with a transversely placed spiral coil insert were investigated by three-dimensional numerical simulation. The structure of multi-longitudinal-vortices (MLVs) induced by the spiral coil and the effects of MLVs on velocity and temperature fields were studied. The three-dimensional spiral coil induces a series of longitudinal vortices in the channel including leading longitudinal vortex, mainstream longitudinal vortices, near-wall longitudinal vortices, and rear central longitudinal vortex. Transport by the longitudinal vortices can increase the mass exchange between the boundary layer and the mainstream, which speeds up the heat migration from the channel walls and enhances the heat diffusion in the mainstream.

Department/s

Publishing year

2014

Language

English

Pages

756-772

Publication/Series

Numerical Heat Transfer Part A: Applications

Volume

66

Issue

7

Document type

Journal article

Publisher

Taylor & Francis

Topic

  • Energy Engineering

Status

Published

ISBN/ISSN/Other

  • ISSN: 1040-7782