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Film condensation under normal and microgravity: Effect of channel shape

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Abstract

This paper presents a theoretical model to predict time dependent film condensation heat transfer in 2-dimensional geometries for different channel shapes. Surface tensions, curvature induced pressures, gravitational forces and shear stresses at liquid-wall interfaces are taken into account. Local and mean heat transfer coefficients, liquid film thickness distribution and cross sectional void fraction are evaluated as a function of time. The predicted results for condensation of R134a vapor in a circular channel (1mm diameter), a square channel (1mm side), and an equilateral triangular channel (1mm side) are presented.

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References

  1. H. S. Wang, J. W. Rose, 2005, “A Theory of film Condensation in Horizontal Noncircular Section Microchannels”. Journal of Heat Transfer, 127, 1096–1105

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  2. H. S. Wang, J. W. Rose, 2006, “Film Condensation in horizontal microchannels: Effect of channel shape”. International Journal of Thermal Science 45, 1205–1212

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Authors and Affiliations

  1. Laboratory of Heat and Mass Transfer (LTCM), Faculty of Engineering Science (STI), École Polytechnique Fédérale de Lausanne (EPFL), CH 1015, Lausanne, Switzerland

    Stefano Nebuloni & John R. Thome

Authors
  1. Stefano Nebuloni
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  2. John R. Thome
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Corresponding author

Correspondence to John R. Thome.

Additional information

Paper was presented on the Second International Topical Team Workshop on TWO-PHASE SYSTEMS FOR GROUND AND SPACE APPLICATIONS October 26–28, 2007, Kyoto, Japan.

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Nebuloni, S., Thome, J.R. Film condensation under normal and microgravity: Effect of channel shape. Microgravity Sci. Technol 19, 125–127 (2007). https://doi.org/10.1007/BF02915772

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  • DOI: https://doi.org/10.1007/BF02915772

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