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Transition from Single-to Multi-Cell Natural Convection of Air in Cavities with an Aspect Ratio of 20: A Thermodynamic Approach

Year 2008, Volume: 11 Issue: 2, 71 - 79, 01.06.2008

Michel Pons

Abstract

Transition from mono-cellular to multi-cellular flow in differentially heated cavities with an aspect ratio of 20 is revisited. Our numerical model is based on the Boussinesq equations, modified for including the work of pressure forces. In high enough cavities, this work has significant effects and results are changed. The Nusselt number is increased while convection is reduced, moreover all transitions are delayed. A thermodynamic analysis of transition is developed. The analysis shows that, after transition, the multi-cellular flow topology tends to decrease altogether viscous friction and work of buoyancy forces. In other words, transition weakens its own cause. This is why a threshold exists.

Keywords

natural convection numerical model thermodynamics irreversibilities

Year 2008, Volume: 11 Issue: 2, 71 - 79, 01.06.2008

Michel Pons

Abstract

There are 0 citations in total.

Details

Primary Language English
Journal Section Regular Original Research Article
Authors

Michel Pons

Publication Date June 1, 2008
Published in Issue Year 2008 Volume: 11 Issue: 2

Cite

APA Pons, M. (2008). Transition from Single-to Multi-Cell Natural Convection of Air in Cavities with an Aspect Ratio of 20: A Thermodynamic Approach. International Journal of Thermodynamics, 11(2), 71-79.
AMA Pons M. Transition from Single-to Multi-Cell Natural Convection of Air in Cavities with an Aspect Ratio of 20: A Thermodynamic Approach. International Journal of Thermodynamics. June 2008;11(2):71-79.
Chicago Pons, Michel. “Transition from Single-to Multi-Cell Natural Convection of Air in Cavities With an Aspect Ratio of 20: A Thermodynamic Approach”. International Journal of Thermodynamics 11, no. 2 (June 2008): 71-79.
EndNote Pons M (June 1, 2008) Transition from Single-to Multi-Cell Natural Convection of Air in Cavities with an Aspect Ratio of 20: A Thermodynamic Approach. International Journal of Thermodynamics 11 2 71–79.
IEEE M. Pons, “Transition from Single-to Multi-Cell Natural Convection of Air in Cavities with an Aspect Ratio of 20: A Thermodynamic Approach”, International Journal of Thermodynamics, vol. 11, no. 2, pp. 71–79, 2008.
ISNAD Pons, Michel. “Transition from Single-to Multi-Cell Natural Convection of Air in Cavities With an Aspect Ratio of 20: A Thermodynamic Approach”. International Journal of Thermodynamics 11/2 (June 2008), 71-79.
JAMA Pons M. Transition from Single-to Multi-Cell Natural Convection of Air in Cavities with an Aspect Ratio of 20: A Thermodynamic Approach. International Journal of Thermodynamics. 2008;11:71–79.
MLA Pons, Michel. “Transition from Single-to Multi-Cell Natural Convection of Air in Cavities With an Aspect Ratio of 20: A Thermodynamic Approach”. International Journal of Thermodynamics, vol. 11, no. 2, 2008, pp. 71-79.
Vancouver Pons M. Transition from Single-to Multi-Cell Natural Convection of Air in Cavities with an Aspect Ratio of 20: A Thermodynamic Approach. International Journal of Thermodynamics. 2008;11(2):71-9.