Impact of micro-fins on a heated cylinder submerged in a nanofluid saturated medium

The results of experimental investigation of free convection heat transfer in a rectangular container are presented. The ability of the commonly accepted correlation equations to reproduce present experimental data was tested as well. It was assumed that the examined geometry fulfils the requirement of no-interaction between heated cylinder and bounded surfaces. In order to check this assumption recently published correlation equations that jointly describe the dependence of the average Nusselt number on Rayleigh number and confinement ratios were examined. As a heat source served electrically heated horizontal tube immersed in an ambient fluid. Experiments were performed with pure ethylene glycol (EG), distilled water (W), and a mixture of EG and water at 50%/50% by volume. A set of empirical correlation equations for the prediction of Nu numbers for Rayleigh number range 3.6 × 104 < Ra < 9.2 × 105 or 3.6 × 105 < Raq < 14.8 × 106 and Pr number range 4.5 ≤ Pr ≤ 160 has been developed. The proposed correlation equations are based on two characteristic lengths, i.e., cylinder diameter and boundary layer length.

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Evolution of an Airy beam in a saturated medium

Laser Physics ◽

10.1088/1054-660x/24/11/115402 ◽

2014 ◽

Vol 24 (11) ◽

pp. 115402 ◽

Cited By ~ 5

Author(s):

Rui-Pin Chen ◽

Khian-Hooi Chew ◽

Ting-Yu Zhao ◽

Pei-Gang Li ◽

Chao-Rong Li

Keyword(s):

Airy Beam ◽

Saturated Medium

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Numerical study of double diffusive mixed convection around a heated cylinder in an enclosure

International Journal of Thermal Sciences ◽

10.1016/j.ijthermalsci.2013.12.016 ◽

2014 ◽

Vol 78 ◽

pp. 169-181 ◽

Cited By ~ 16

Author(s):

Hongtao Xu ◽

Ruixue Xiao ◽

Fariborz Karimi ◽

Mo Yang ◽

Yuwen Zhang

Keyword(s):

Mixed Convection ◽

Numerical Study ◽

Heated Cylinder ◽

Double Diffusive

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Numerical Study of Boiling Heat Transfer Around Horizontal and Inclined Cylinders

Journal of Heat Transfer ◽

10.1115/1.4052153 ◽

2021 ◽

Author(s):

Avik Saha ◽

Arup Kumar Das

Keyword(s):

Heat Transfer ◽

Numerical Study ◽

Horizontal Cylinder ◽

Uniform Heat Flux ◽

Cylinder Surface ◽

Transfer Coefficients ◽

Heated Cylinder ◽

Heat Transfer Coefficients ◽

Stages Of Growth ◽

Saturated Water

Abstract Pool boiling around a heated cylinder having a diameter larger than the departure diameter of bubbles has been simulated numerically. Thermally uniform heat flux condition has been maintained at the outer surface of the cylinder, submerged at saturated water at atmospheric pressure. Using the Volume of Fluid type framework of liquid phase fraction in the domain, bubble life cycle around the horizontal cylinder has been analyzed to understand different stages of growth, sliding, merging prior to departure. An effort has also been made to characterize the bubble population, emerging from different sites over the cylindrical surface. The influence of cylinder inclination along its axis on these interfacial features has also been discussed using representative numerical simulation. Temperature profiles of the cylinder surface have been portrayed for both horizontal and inclined situations before presenting respective heat transfer coefficients.

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