With the goal of intensifying turbulent free convection from heated vertical plates to cold gases, five binary gas mixtures are examined in this technical note. Helium (He) is chosen as the principal gas while xenon (Xe), nitrogen , oxygen , carbon dioxide , and methane are the companion gases. From thermal physics, the thermophysical properties affecting turbulent free convection of binary gas mixtures are the viscosity , the thermal conductivity , the density , and the heat capacity at constant pressure . Invoking the similarity variable transformation, the system of two nonlinear differential equations is solved numerically by the shooting method and a fourth-order Runge-Kutta-Fehlberg algorithm. From the numerical temperature fields, the allied mean convection coefficients changing with the molar gas composition in the domain [0, 1] are plotted in congruous diagrams for the five binary gas mixtures under study.
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e-mail: acampo@cems.uvm.edu
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January 2006
Technical Briefs
Optimal Molar Gas Composition of Selected Gas Mixtures With Helium that Maximize Turbulent Free Convection Along Vertical Plates
Antonio Campo,
Antonio Campo
Department of Mechanical Engineering,
e-mail: acampo@cems.uvm.edu
The University of Vermont
, Burlington, VT 05405
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Salah Chikh,
Salah Chikh
Départment de Génie Mécanique,
USTHB
, B.P. 32, El Alia, Bab Ezzoaur 16111, Algeria
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Shyam S. Sablani
Shyam S. Sablani
Department of Bioresource and Agricultural Engineering,
Sultan Qaboos University
, Al-Khod PC 123, Muscat, Oman
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Antonio Campo
Department of Mechanical Engineering,
The University of Vermont
, Burlington, VT 05405e-mail: acampo@cems.uvm.edu
Salah Chikh
Départment de Génie Mécanique,
USTHB
, B.P. 32, El Alia, Bab Ezzoaur 16111, Algeria
Shyam S. Sablani
Department of Bioresource and Agricultural Engineering,
Sultan Qaboos University
, Al-Khod PC 123, Muscat, OmanJ. Fluids Eng. Jan 2006, 128(1): 199-201 (3 pages)
Published Online: July 13, 2005
Article history
Received:
May 18, 2004
Revised:
July 13, 2005
Citation
Campo, A., Chikh, S., and Sablani, S. S. (July 13, 2005). "Optimal Molar Gas Composition of Selected Gas Mixtures With Helium that Maximize Turbulent Free Convection Along Vertical Plates." ASME. J. Fluids Eng. January 2006; 128(1): 199–201. https://doi.org/10.1115/1.2137349
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