The effect of noncondensable gas on laminar film condensation of a liquid metal on an isothermal vertical surface with forced vapor flow is analyzed. Where necessary the interfacial resistance due to thermodynamic nonequilibrium is included for a condensation coefficient σ = 1. A computer program has been developed to solve a finite-difference analog of the governing partial differential equations and is applied here to the mercury–air and sodium–argon systems. Heat-transfer results are presented for vapor velocities in the range 1 to 100 fps with mass fraction of gas varying from 10−5 to 3 × 10−2. The overall temperature difference ranged from 0.1 to 30 deg F while the temperature levels were 1200 and 900 deg R for mercury–air and 2000 and 1500 deg R for sodium–argon. The effect of noncondensable gas is most marked for low vapor velocities and high gas concentrations. At the lower pressure levels the inter facial resistance plays a dominant role, causing maxima in the curves of q/qNu versus x. For the mercury–air system the adverse buoyancy force causes vapor boundary-layer separation when the free-stream vapor velocity is low.
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The Effect of Noncondensable Gas on Laminar Film Condensation of Liquid Metals
R. H. Turner,
R. H. Turner
University of California, Los Angeles, Calif.
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A. F. Mills,
A. F. Mills
University of California, Los Angeles, Calif.
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V. E. Denny
V. E. Denny
University of California, Los Angeles, Calif.
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R. H. Turner
University of California, Los Angeles, Calif.
A. F. Mills
University of California, Los Angeles, Calif.
V. E. Denny
University of California, Los Angeles, Calif.
J. Heat Transfer. Feb 1973, 95(1): 6-11 (6 pages)
Published Online: February 1, 1973
Article history
Received:
June 28, 1971
Online:
August 11, 2010
Citation
Turner, R. H., Mills, A. F., and Denny, V. E. (February 1, 1973). "The Effect of Noncondensable Gas on Laminar Film Condensation of Liquid Metals." ASME. J. Heat Transfer. February 1973; 95(1): 6–11. https://doi.org/10.1115/1.3450007
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