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Developing mixed convection in a coiled heat exchanger.

Author(s) : SILLEKENS J. J. M., RINDT C. M., STEENHOVEN A. A. van

Type of article: Article

Summary

In this paper the development of mixed convection in a helically coiled heat exchanger is studied. It appeared that heat transfer is highly influenced by secondary flow induced by centrifugal and buoyancy forces. For low Grashof numbers a splitting phenomenon of the temperature field is observed due to large secondary velocities, resulting in two separated areas of fluid. For high Grashof numbers the fluid in the coiled pipe becomes almost linearly stratified which results in small secondary velocities. A wavy behaviour in the Nusselt number is observed for medium Grashof numbers.

Details

  • Original title: Developing mixed convection in a coiled heat exchanger.
  • Record ID : 1998-3427
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 41 - n. 1
  • Publication date: 1998/01

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