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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN 印刷: 2152-5102
ISSN オンライン: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v41.i4.50
pages 353-367

Analytical and Numerical Investigations of Physical Dimensions of Natural Convection Flow on a Vertical Heated Plate

Ali S. Alzwayi
Systems, Power & Energy Research Division, School of Engineering, University of Glasgow,Glasgow, G12 8QQ, UK
Manosh C. Paul
Systems, Power & Energy Research Division, School of Engineering, University of Glasgow, Glasgow, G12 8QQ, UK

要約

The analytical and numerical results of a natural convection boundary layer flow on a vertical heated plate are presented. We specifically look at the effects of heat flux and plate temperatures on the development of a physical boundary layer along its heated surface. The plate temperature and heat flux examined are 9 ≤ T(°C) ≤ 100 and 50 ≤ qP ≤ 553 (W/m2) respectively. The results show that the variation in plate temperature has a significant effect on transition and the difference between the temperature of the air and the plate has even more effect on the transition particularly when TP ≤ 60°C. The transition on the constant heat-flux plate is less affected by air temperature and mostly depends on the quantity of heat flux. A Realizable k−ε turbulent model with an enhanced wall function is employed in a numerical simulation, and important results, including the distribution of maximum velocity, and kinetic energy and its production along the heated plate, are examined for a selection of air temperatures. The results indicate that the production of kinetic energy reaches its peak at the transition stage, and both the velocity and turbulent kinetic energy increase sharply at the turbulent flow regime. Analytical and numerical results are compared with those of various relevant experimental studies and found to be in good agreement with them.


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