HEAT CONVECTION ON CYLINDER AT HIGH PRANDTL NUMBERS

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RAHIMI A.B.

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Journal Paper

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Journal: Scientia Iranica Year:2003 | Volume:10 | Issue:2 Page(s): 186-193

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Title

HEAT CONVECTION ON CYLINDER AT HIGH PRANDTL NUMBERS

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RAHIMI A.B. | Issue Writer Certificate

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Abstract

Natural convection flow on a vertical cylinder is considered here when the Prandtl number is large. Little work has been done in this field apart from some experimental studies which are for lower Prandtl numbers. Here. the singular perturbation technique is used to solve this problem. The method adopted is to split the flow into a thin layer close to the surface of the cylinder, surrounded by a much thicker layer where the velocity is reduced to zero. It is shown that at high Prandtl numbers, the velocity boundary layer tends to be somewhat larger due to large kinematic viscosity relative to thermal diffusivity. The motion of the outer layer, however, seems to be caused by the drag force exerted by the inner layer, not due to the buoyancy itself.The basic properties of the flow are evaluated. The heat transfer coefficient is shown to give good prediction for all ranges of Prandtl numbers.

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APA: Copy

RAHIMI, A.B.. (2003). HEAT CONVECTION ON CYLINDER AT HIGH PRANDTL NUMBERS . SCIENTIA IRANICA, 10(2), 186-193. SID. https://sid.ir/paper/289458/en

Vancouver: Copy

RAHIMI A.B.. HEAT CONVECTION ON CYLINDER AT HIGH PRANDTL NUMBERS . SCIENTIA IRANICA[Internet]. 2003;10(2):186-193. Available from: https://sid.ir/paper/289458/en

IEEE: Copy

A.B. RAHIMI, “HEAT CONVECTION ON CYLINDER AT HIGH PRANDTL NUMBERS ,” SCIENTIA IRANICA, vol. 10, no. 2, pp. 186–193, 2003, [Online]. Available: https://sid.ir/paper/289458/en

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