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Theoretical study on condensation heat transfer for a horizontal elliptical tube in stationary saturated vapor with wall suction effect.

Number: pap. A5-091

Author(s) : CHANG T. B., YEH W. T., WANG F. J.

Summary

An analytical investigation is performed into the problem of steady filmwise condensation flow over the outside surface of a horizontal elliptical tube with suction at the tube surface. As in classical film condensation problems, an assumption is made that the condensate and vapor layers meet at a common boundary. By introducing an effective suction function to represent the effect of the wall suction on the thickness of the liquid film, both the local condensate film thickness and the local Nusselt number are derived using a simple numerical shooting method. In performing the analysis, the liquid film flow is governed by the combined effects of the gravitational force and the surface tension force. The analytical results indicate that the mean Nusselt number depends on the Jakob number, the Rayleigh number, the Bond number, ellipticity and the suction parameter.

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Pages: 9 p.

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Details

  • Original title: Theoretical study on condensation heat transfer for a horizontal elliptical tube in stationary saturated vapor with wall suction effect.
  • Record ID : 30004708
  • Languages: English
  • Source: ACRA2010. Asian conference on refrigeration and air conditioning: Tokyo, Japan, June 7-9, 2010.
  • Publication date: 2010/06/07

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