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COMPUTER VISUALIZATION OF FLUID CIRCULATION IN ANNULI OF HEATED ROTATING CYLINDERS OF LOW PRANDTL NUMBER FLUIDS

T. S. LEE

Mechanical Engineering Department, National University of Singapore, Singapore 119260, Singapore

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ZHIDAO XU

Mechanical Engineering Department, National University of Singapore, Singapore 119260, Singapore

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, and

YUNLONG HUO

Mechanical Engineering Department, National University of Singapore, Singapore 119260, Singapore

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https://doi.org/10.1142/S1465876304002435Cited by:0 (Source: Crossref)

Abstract

The present work considered fluid circulation in an annular region between two cylinders with the inner cylinder heated and rotating. The Prandtl number (Pr) considered here varies from 0.01 to 1.0 and Rayleigh number (Ra) is of the order of 10⁵. Reynolds number Re in the range of 0 to 1120 was considered. Mono-thermal plume above the stationary inner was observed for higher Prandtl number fluids (Pr≫0.1) while bi-thermal plume above the stationary inner cylinder was observed for lower Prandtl number fluids (Pr≪0.1). However, when the inner cylinder is made to rotate, the thermal plume for higher and lower Prandtl number fluids were observed to move in different directions. The mechanism of the mono- and bi-thermal plumes movements were investigated through numerical flow simulations.

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References

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Vol. 05, No. 02

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COMPUTER VISUALIZATION OF FLUID CIRCULATION IN ANNULI OF HEATED ROTATING CYLINDERS OF LOW PRANDTL NUMBER FLUIDS

Abstract

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