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- W2946754433 abstract "In this paper, turbulent airflow and heat transfer are studied numerically in a square sectioned channel which is rotating about a parallel axis. Channel rotation may create secondary flows as a result of centrifugal buoyancy and Coriolis forces which may increase the heat transfer coefficient and wall friction. Under certain conditions that the axial flow is dominant over the rotation, the effects of rotation can simply be ignored which means that friction factor and Nusselt number can be calculated regardless of rotation. This paper explores a novel criterion to demonstrate how the rotation affects the fluid flow and heat transfer. Rotational Grashof number (GrΩ) and Reynolds number (ReΩ) are chosen to describe the rotation effects in addition to Reynolds number (Re) taking the axial flow into account. The results show that at a given GrΩ and, ReΩ a specific Reynolds number (Re∗) in which the effects of rotation vanishes can be defined. It is revealed that Re∗ may be presented as a function of GrΩ only. With this regards, a non- dimensional group as GrΩa1/Re is obtained which is utilized to judge the rotational effects. It is shown that for GrΩa1/Re>0.0167 the rotation starts to become important while for GrΩa1/Re<0.0167 the Nusselt number is approximately equal to stationary counterpart." @default.
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- W2946754433 date "2019-08-01" @default.
- W2946754433 modified "2023-10-17" @default.
- W2946754433 title "A criterion for the effect of parallel mode rotation on non- isothermal flow through square channel" @default.
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- W2946754433 doi "https://doi.org/10.1016/j.ijheatmasstransfer.2019.04.096" @default.
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