The Flow around an Inclined Circular Cylinder and Aerodynamic Sound

Haramoto, Yasutake; Arita, Yutaka; Shingai, Mitsuru; Ohba, Hideki

doi:10.1299/jsmemecjo.2002.7.0_121

Cited by 1 publication

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“…Laminar forced convective fluid flow and heat transfer arises in a range of engineering problems particularly where viscous fluids are either cooled or heated and the heat transfer involved in this process is low, hence the need for heat augmentation. Dirker and Meyer (2002), Dou et al, (2005), Haramoto et al, (2002) and Jawarneh (2007) submitted that annulus flow passage is being widely used in aeroengines, turbomachinery, in the reduction of drag force, cooling of the rotor and stator of electric motors and generators, petroleum engineering and various chemical industrial devices. When the need to enhance heat transfer between a solid and an adjourning fluid arises, extended surfaces otherwise known as fins are employed (Incropera & Dewitt, 2002).…”

Section: Introductionmentioning

confidence: 99%

Laminar Forced Convective Heat Transfer and Fluid Flow in a Finned Cylindrical Annulus

et al. 2017

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The purpose of this paper is to numerically investigate the effects of some geometric parameters and flow variables on heat transfer augmentation in annuli with equi-spaced internal longitudinal fins along the external walls. A fully developed flow and a constant thermal boundary condition of uniform heat flux at the walls of the pipe were assumed. Continuity, momentum and energy transport equations were adopted for the solutions of the problem. A Q-BASIC code was written based on the finite difference scheme generated. Numerical experiments were conducted to ascertain the effects of Reynolds number Re, radius ratio, R.R, Prandtl number Pr, fin height H, and pipe inclination, on the rate of heat transfer and fluid flow. The results obtained show that for 50 ≤ Re ≤ 500, total Nusselt number NuT increases with increase in Re while for Re > 500, there was no significant increase in NuT. Nusselt number, average velocity and bulk temperature of the fluid increase with increasingin the range 0° ≤ ≤ 75° but for the range 75°≤ ≤ 90° the effect is negligible. For R.R > 0.6, the heat transfer was observed to be almost independent of R; therefore for economic purposes, heat exchangers similar to the configuration studied should be run at a low pumping power. A numerical study was done to validate the program by test running it for the finless annuli for similar boundary conditions; the results obtained in the present work show the same trend as that of Kakac and Yucel.

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Section: Introductionmentioning

confidence: 99%