Mixed convection heat transfer simulation in a rectangular channel with a variable speed rotational cylinder

Numerical simulation of steady two-dimensional heat transfer in a rectangular channel with a centered variable speed cylinder has been performed in this paper. In this setup, an isoflux heater is placed at the bottom wall of the channel while the upper wall is kept isothermal with a low temperature....

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Main Authors: Khan, Md Imran, Billah, Md. Mamun, Rahman, Mohammed Mizanur, Hasan, Mohammad Nasim
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Billah, Md. Mamun
Rahman, Mohammed Mizanur
Hasan, Mohammad Nasim
description Numerical simulation of steady two-dimensional heat transfer in a rectangular channel with a centered variable speed cylinder has been performed in this paper. In this setup, an isoflux heater is placed at the bottom wall of the channel while the upper wall is kept isothermal with a low temperature. The cylinder’s peripheral speed to maximum inlet fluid velocity ratio (ξ) is varied from 0.5 to 1.5 for both clockwise and anticlockwise rotational cases. Air has been considered as working fluid while other system parameters such as Grashof and Reynolds numbers are varied. The effects of rotational speed, Grashof and Reynolds numbers on the streamline pattern, isothermal lines, local and average Nusselt number are analyzed and presented. It is observed the cylinder’s rotational direction and speed has a significant effect on the flow pattern, temperature distribution as well as heat transfer characteristics.
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title Mixed convection heat transfer simulation in a rectangular channel with a variable speed rotational cylinder
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