THE INFLUENCE OF A PAIR CONSTANT TEMPERATURE BAFFLES ON POWER-LAW FLUIDS NATURAL CONVECTION IN A SQUARE ENCLOSURE

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RAISI AFRASIAB

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Journal: Modares Mechanical Engineering Year:2016 | Volume:15 | Issue:11 Page(s): 215-224

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Title

THE INFLUENCE OF A PAIR CONSTANT TEMPERATURE BAFFLES ON POWER-LAW FLUIDS NATURAL CONVECTION IN A SQUARE ENCLOSURE

Author(s)

RAISI AFRASIAB | Issue Writer Certificate

Keywords

NATURAL CONVECTIONQ2

ENCLOSUREQ2

NON-NEWTONIANQ2

BAFFLEQ2

Abstract

In this study, the NATURAL CONVECTION heat transfer is numerically examined in a square ENCLOSURE filled with a non-Newtonia power-law fluid. Two fixed temperature BAFFLEs are mounted on the left wall of the ENCLOSURE. The left wall of the ENCLOSURE and the BAFFLEs installed on it, are at a constant temperature of T_h and the right wall of the ENCLOSURE is at a constant temperature of T_c, while its horizontal walls are thermally insulated. The governing equations for the power-law fluid flow are solved with the numerical finite difference method based on the control volume formulation and SIMPLE algorithm. The study investigates the effects of relevant parameters such as the Rayleigh number ((10)Ù3£Ra£(10)Ù6), the power-law index (0.8£D£1.4), the BAFFLEs length (0£B£0.5) and the BAFFLEs distance from each other (0.1£D£0.8) on flow and temperature fields and the rate of heat transfer. The results show that an increase in Rayleigh number, particularly when n<1 improves the thermal performance of the ENCLOSURE. Furthermore, using NON-NEWTONIAN shear thinning fluids, especially at higher Rayleigh numbers, increases the rate of heat transfer. Results also show that, depending on the Rayleigh number and the power-law index, the length and position of the BAFFLEs have significant effects on the thermal performance of the ENCLOSURE.

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APA: Copy

RAISI, AFRASIAB. (2016). THE INFLUENCE OF A PAIR CONSTANT TEMPERATURE BAFFLES ON POWER-LAW FLUIDS NATURAL CONVECTION IN A SQUARE ENCLOSURE. MODARES MECHANICAL ENGINEERING, 15(11), 215-224. SID. https://sid.ir/paper/177735/en

Vancouver: Copy

RAISI AFRASIAB. THE INFLUENCE OF A PAIR CONSTANT TEMPERATURE BAFFLES ON POWER-LAW FLUIDS NATURAL CONVECTION IN A SQUARE ENCLOSURE. MODARES MECHANICAL ENGINEERING[Internet]. 2016;15(11):215-224. Available from: https://sid.ir/paper/177735/en

IEEE: Copy

AFRASIAB RAISI, “THE INFLUENCE OF A PAIR CONSTANT TEMPERATURE BAFFLES ON POWER-LAW FLUIDS NATURAL CONVECTION IN A SQUARE ENCLOSURE,” MODARES MECHANICAL ENGINEERING, vol. 15, no. 11, pp. 215–224, 2016, [Online]. Available: https://sid.ir/paper/177735/en

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