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TECHNICAL PAPERS: Evaporation, Boiling, and Condensation

Investigation of Decisive Mixture Effects in Nucleate Boiling of Binary Mixtures Using a Theoretical Model

[+] Author and Article Information
Jürgen Kern, Peter Stephan

Chair of Technical Thermodynamics, Darmstadt University of Technology, Petersenstrasse 30, 64287 Darmstadt, Germany

J. Heat Transfer 125(6), 1116-1122 (Nov 19, 2003) (7 pages) doi:10.1115/1.1622716 History: Received August 05, 2002; Revised August 26, 2003; Online November 19, 2003
Copyright © 2003 by ASME
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References

Dhir,  V. K., 2001, “Numerical Simulations of Pool-Boiling Heat Transfer,” AIChE J., 47(4), pp. 813–834.
Stephan,  P., and Hammer,  J., 1994, “A New Model for Nucleate Boiling Heat Transfer,” Heat Mass Transfer, 30, pp. 119–125.
Kern,  J., and Stephan,  P., 2003, “Theoretical Model for Nucleate Boiling Heat and Mass Transfer of Binary Mixtures,” ASME J. Heat Transfer, 125(6), pp. 1106–1115.
Kern, J., 2002, “Modellierung und numerische Berechnung des Wärmeübergangs beim Blasensieden binärer Gemische,” Ph.D. thesis, Fortschritt-Berichte VDI, 3 (727), VDI-Verlag, Düsseldorf.
Fritz,  W., 1935, “Berechnung des Maximalvolumens von Dampfblasen,” Phys. Z., 11, pp. 379–384.
Benjamin,  R. J., and Balakrishnan,  A. R., 1997, “Nucleation Site Density in Pool Boiling of Binary Mixtures: Effect of Surface Micro-roughness and Surface and Liquid Physical Properties,” Can. J. Chem. Eng., 75, pp. 1080–1089.
Bednar, W., and Bier, K., 1994, “Wärmeübergang beim Blasensieden von binären Kohlenwasserstoffgemischen,” Ph.D. thesis, Fortschritt-Berichte VDI, 3 (357), VDI-Verlag, Düsseldorf.
Fujita,  Y., and Tsutsui,  M., 1994, “Heat Transfer in Nucleate Pool Boiling of Binary Mixtures,” Int. J. Heat Mass Transfer, 37(1), pp. 291–304.
Schlünder, E. U., 1986, “Heat Transfer in Nucleate Boiling of Mixtures,” Proceedings of 8th International Heat Transfer Conference, C. L. Tien, V. P. Carey, and J. K. Ferrell, eds., Hemisphere, Washington, 4 (4), pp. 2073–2079.
Stephan,  K., and Körner,  M., 1969, “Berechnung des Wärmeübergangs verdampfender binärer Flüssigkeitsgemische,” Chem.-Ing.-Tech., 41(7), pp. 409–416.
Ammermann,  C. N., You,  S. M., and Hong,  Y. S., 1996, “Identification of Pool Boiling Heat Transfer Mechanisms from a Wire Immersed in Saturated FC-72 Using a Single-Photo/LDA Method,” ASME J. Heat Transfer , 118, pp. 117–123.

Figures

Grahic Jump Location
Single bubble subsystem and significant phenomena in the micro region
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Comparison of computational results with data from experiments 5 and correlations 678 of the binary mixture ethane/propane for different compositions (p*=0.1, q̇m=4×103 W/m2)
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Ratio of pressure gradient due to Marangoni convection and total pressure gradient in the micro region of the binary mixture propane/n-butane (yl,1,bulk=0.063, p*=0.2, Tout−Tsat=7,87 K, ξads=0.016 mm, r=0.05 mm)
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Velocity profiles in the micro region of the binary mixture propane/n-butane (yl,1,bulk=0.063, p*=0.2, Tout−Tsat=7,87 K, ξads=0.016 mm, r=0.05 mm)
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Liquid vapor phase equilibrium diagrams of zeotropic and azeotropic mixtures. Classified with regard to the sign of the difference between liquid and vapor mole fraction at equilibrium.
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Ratio of heat flow Q̇mic considering selected effects and heat flow Q̇mic(xl=const.) assuming constant liquid composition in the micro region of the binary mixture propane/n-butane (p*=0.2, q̇m=2×104 W/m2, r=dA/4)
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Liquid film thickness and heat flux in the micro region of the binary mixture propane/n-butane considering selected effects (yl,1,bulk=0.198, p*=0.2, Tout−Tsat=7,87 K, r=0.043mm)
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Calculated bubble radii versus time of the binary mixture propane/n-butane (yl,1,bulk=0.667, p*=0.2, Tout−Tsat=7,87 K)
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Variation of decisive mixture effects. Calculated heat transfer coefficients of the binary mixture ethane/propane for different compositions (p*=0.1, q̇m=4×103 W/m2)
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Bubble site density and departure diameter of the binary mixture ethane/propane for different compositions (p*=0.1, q̇m=4×103 W/m2)
Grahic Jump Location
Variation of decisive mixture effects. Calculated heat transfer coefficients of the binary mixture propane/n-butane for different compositions (p*=0.2, q̇m=2×104 W/m2).
Grahic Jump Location
Bubble site density and departure diameter of the binary mixture propane/n-butane for different compositions (p*=0.2, q̇m=2×104 W/m2)
Grahic Jump Location
Liquid film thickness and heat flux in the micro region of the binary mixture propane/n-butane (yl,1,bulk=0.063, p*=0.2, Tout−Tsat=7,87 K, ξads=0.016 mm, r=0.05 mm)
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Liquid and vapor mass fraction of the more volatile component propane as well as saturation temperature in the micro region of the binary mixture propane/n-butane (yl,1,bulk=0.063, p*=0.2, Tout−Tsat=7,87 K, ξads=0.016 mm, r=0.05mm)
Grahic Jump Location
Ratio of diffusive to convective mass flow of the more volatile component propane in the micro region of the binary mixture propane/n-butane (yl,1,bulk=0.063, p*=0.2, Tout−Tsat=7,87 K, ξads=0.016 mm, r=0.05 mm)

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