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Research paper
Published: 01.12.2019.
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https://doi.org/10.24874/jsscm.2020.14.01.10

UPWARD FLOW AND HEAT TRANSFER AROUND TWO HEATED CIRCULAR CYLINDERS IN SQUARE DUCT UNDER AIDING THERMAL BUOYANCY

By
H. Laidoudi
H. Laidoudi
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Abstract

This paper presents a numerical investigation of mixed convection heat transfer around a pair of identical circular cylinders placed in side-by-side arrangement inside a square cavity of single inlet and outlet ports. The investigation provided the analysis of gradual effect of aiding thermal buoyancy on upward flow around cylinders and its effect on heat transfer rate. For that purpose, the governing equations involving continuity, momentum and energy are solved using the commercial code ANSYS-CFX. The distance between cylinders is fixed with half-length of cavity. The simulation is assumed to be in laminar, steady, incompressible flow within range of following conditions: Re = 1 to 40, Ri = 0 to 1 at Pr = 0.71. The main obtained results are shown in the form of streamline and isotherm contours in order to interpret the physical phenomena of flow and heat transfer. The average Nusselt number is also computed and presented. It was found that increase in Reynolds number and/or Richardson number increases the heat transfer. Also, aiding thermal buoyancy creates new form of counter-rotating zones between cylinders.

Keywords:

Mixed convection,
circular cylinder,
square cavity,
aiding buoyancy,
local Nusselt number,
average Nusselt number

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Issue image
Vol 14, Issue 1, 2020
MULTISCALE COMPOSITE 3D FINITE ELEMENT FOR LUNG MECHANICS THERMO-DIFFUSION AND HALL EFFECT ON RADIATING AND REACTING MHD CONVECTIVE HEAT ABSORBING FLUID PAST AN EXPONENTIALLY ACCELERATED VERTICAL POROUS PLATE WITH RAMPED TEMPERATURE A STOCHASTIC MODEL FOR CRACK INITIATION LIFE PREDICTION OF AN AUSTENITIC STAINLESS STEEL UNDER CONSTANT AMPLITUDE LOADING COMBINED EFFECT OF THERMAL RADIATION AND VISCOUS DISSIPATION ON UNSTEADY FREE CONVECTIVE MAGNETO-HYDRODYNAMIC FLOW THROUGH AN IRREGULAR CHANNEL ENHANCED DAMPING CHARACTERISTICS OF TIMOSHENKO BEAM ON ELASTIC AND METAMATERIAL FOUNDATIONS See full issue

Citations

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3

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Flow of the Bingham-Papanastasiou Regularized Material in a Channel in the Presence of Obstacles: Correlation between Hydrodynamic Forces and Spacing of Obstacles

Modelling and Simulation in Engineering, 2021()

10.1155/2021/5583110
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Garima Vishal, Jyoti Tomar, Ram Prakash Bharti

(2021)

Critical parameters for non-Newtonian shear-thickening power-law fluids flow across a channel confined circular cylinder

Journal of the Taiwan Institute of Chemical Engineers, 123()

10.1016/j.jtice.2021.05.025
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Nazım KURTULMUŞ

(2022)

Mixed Convection from Inclined Square Cylinder in a Square Cavity

ALKÜ Fen Bilimleri Dergisi, 4(2)

10.46740/alku.1165867

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