Hostname: page-component-78c5997874-ndw9j Total loading time: 0 Render date: 2024-11-19T17:40:27.170Z Has data issue: false hasContentIssue false
  • English
  • Français

Heat and Mass Transfer in an Inclined Semi-Annular Enclosure

Published online by Cambridge University Press:  05 May 2011

L.W. Wang ,
Y.C. Kung  and
S.D. Lai
L.W. Wang*
Affiliation:
Department of Mechanical Engineering, Yuan Ze University, Neili, Taoyuan, Taiwan 320, R. O. C.
Y.C. Kung*
Affiliation:
Department of Mechanical Engineering, Yuan Ze University, Neili, Taoyuan, Taiwan 320, R. O. C.
S.D. Lai*
Affiliation:
Department of Mechanical Engineering, Yuan Ze University, Neili, Taoyuan, Taiwan 320, R. O. C.
*
*Professor
**Research Assistant
**Research Assistant
Get access

Abstract

An experimental investigation of heat transfer carried out for a semiannular enclosure. Inner and outer walls of the enclosure were kept at different but constant temperatures. The semiannular enclosure was filled with a CuSO4 - H2SO4 - H2O solution. An electrochemical method has been used for the mass transfer. The purpose of this study is to investigate flows resulting from buoyancy due to a combination of both temperature and concentration gradients in the enclosure. The flow structure in the enclosure was visualized by the shadowgraph technique. Flow visualization photograph showed interesting multi-cell flow structures in the enclosure for the cooperating and opposing thermal and solutal buoyancy. An optical technique is based on the idea that the intensity of the light beam absorbed by the copper sulphate solution is proportional to the solution concentration when the light beam passes through the solution. For each flow regime the mass transfer coefficient across the enclosure was also measured. The ranges of the dimensionless parameters studied in the experimental were Ar = 0.23, k = 2.5, Sc = 1700∼2300, Pr = 6.5 ∼ 7.3, Grt = 104 ∼ 106, N = −15.44 ∼ 6.16, θ = 45°∼90°.

Keywords

Thermosolutal ConvectionLimiting currentelectrochemical method.
Type
Articles
Information
Journal of Mechanics , Volume 20 , Issue 1 , March 2004 , pp. 27 - 32
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2004

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1.Kuehn, T. H. and Goldstein, R. J., “An Experimental and Theoretical Study of Natural Convection in the Annulus between Horizontal Concentric Cylinders,” J. Fluid Mech., Vol. 74, pt. 4, pp. 695–719 (1976).CrossRefGoogle Scholar
2.Kuehn, T. H. and Goldstein, R. J., “A Parametric Study of Prandlt Number and Diameter Ratio Effects on Natural Convection Heat Transfer in Horizontal Cylindrical Annuli,” J. Heat Transfer, Vol.102, pp. 768–770 (1980).CrossRefGoogle Scholar
3.Kamotani, Y., Wang, L.W., Ostrach, S. and Jiang, H. D., “Experimental Study of Natural Convection in Shallow Enclosures with Horizontal Temperature and Concentration Gradients,” Int. J. Heat Mass Transfer, Vol.28, No. 1, pp. 165–173 (1985).CrossRefGoogle Scholar
4.Kamotani, Y., Wang, L. W. and Ostrach, S., “Experimental on Natural Convection Heat Transfer in Low Aspect Ratio Enclosures,” AIAA J., Vol.21, No. 2, pp. 290–294 (1983).CrossRefGoogle Scholar
5.Wang, L. W., Chai, A. T. and Sun, D. J. “Convective Flows in Enclosures with Vertical Temperature or Concentration Gradients,” AIAA Paper 89-0069 (1989).CrossRefGoogle Scholar
6.Wilke, C. R., Tobias, C. W. and Eisenberg, M., “Correlations of limiting Currents under Free Convection Conditions,” J. Electrochem. Soc., Vol.100,513 (1953).CrossRefGoogle Scholar
7.Gau, C. and Wu, K. H., “A Nonintrusive Technique for Measurement of Concentration Distribution in Enclosure,” Experimental Heat Transfer, Vol.2, pp. 215–226 (1989).CrossRefGoogle Scholar
8.Gau, C. and Wu, K. H., “Layer Growth Process of Transient Thermosolutal Convection in a Square Enclosure,” Int. J. Heat Mass Transfer, Vol.35, No. 9, pp. 2257–2269 (1992).CrossRefGoogle Scholar
9.Kline, S. J. and McClintock, F. A., “Describing Uncertainty in Single-Sample Experiments,” Mech. Eng., pp. 3–8(1953).Google Scholar
10.Wang, L. W., Deng, Z. F., Wang, S. L. and Kung, Y. C., “Thermosolutal Convection in a Partially Divided Square,” Experimental Heat Transfer, Vol.13, pp. 211–221 (2000).CrossRefGoogle Scholar