Natural Convection in a Square Cavity with Spatial Side-Wall Temperature Variation

Saeid, Nawaf H.; Yaacob, Yusli

doi:10.1080/10407780500359943

Cited by 72 publications

(31 citation statements)

References 28 publications

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“…However, very little work is done on natural convection in a cavity filled with a porous medium with boundary conditions thermal periodic in time and using the Darcy model. Some of the documents dealing with this problem are, Saeid [17], Malomar et al [18]. The main objective of the present study is to contribute to the enrichment of the kind of problem by examining the effect of the imposed sinusoidal temperatures parameter (frequency) on the structure of the flow and transfer thermal.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of 2-D Natural Convection in a Square Porous Cavity: Effect of Three Mode Heating

Malomar¹,

Mbow²,

Tall³

et al. 2017

OJFD

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The work we present in this paper is a continuation of a series of studies on the numerical study of natural convection in a square porous cavity saturated by a Newtonian fluid. The left vertical wall is subjected to a temperature varying sinusoidally in time while the right vertical wall is either at a constant temperature, or varying sinusoidally in time. The upper and lower horizontal walls are thermally adiabatic. Darcy model is used, it is also assumed the fluid studied is incompressible and obeys the Boussinesq approximation. The focus is on the effect of the modulation frequency ( 10 100 ω ≤ ≤ ) on the structure of the flow and transfer thermal. The results show that the extremal stream functions ( max ψ et min ψ ), the average Nusselt number at the hot ( h T ) and cold ( c T ) walls respectively Nuh and Nuc are periodic in the range of parameters considered in this study. In comparison with the constant heating conditions, it is found that the variable heating causes the appearance of secondary flow, whose amplification depends on the frequency of modulation of the imposed temperature but also of the heating mode. The results are shown in terms of streamlines and isotherms during a flow cycle.

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Section: Introductionmentioning

confidence: 99%

Numerical Study of 2-D Natural Convection in a Square Porous Cavity: Effect of Three Mode Heating

Malomar¹,

Mbow²,

Tall³

et al. 2017

OJFD

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“…They observed that the best heat transfer rate is comprehended when the dimensionless frequency (Strouhal number) is close to unity and also heat transfer is enhanced in comparison to the steady state case. The effects of the oscillation on the heat transfer and fluid flow have been investigated by the other researchers [13][14][15][16][17][18]. Khanafer et al [19] investigated numerically, unsteady laminar mixed convection heat transfer in an oscillating lid-driven cavity to study the effects of Reynolds number, Grashof number and oscillating frequency on heat transfer.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer enhancement of mixed convection in a square cavity with inlet and outlet ports due to oscillation of incoming flow

Sourtiji

Hosseinizadeh

Gorji-Bandpy

et al. 2011

International Communications in Heat and Mass Transfer

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“…Kalabin et al [1,2] investigated the problems of natural convection heat transfer in a cavity with timevarying side-wall temperature and heat transfer from the cold wall of a square cavity to the hot one by oscillatory natural convection. Natural convection in a square cavity with spatial side-wall temperature variation was investigated by Saeid and Yaacob [3]. They investigated the effects of amplitude and the wave number of the heated side-wall temperature variation on the natural convection in the cavity.…”

Section: Introductionmentioning

confidence: 99%

Conjugate natural convection in a square cavity with finite thickness horizontal walls

Mobedi¹

2008

International Communications in Heat and Mass Transfer

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The effect of conduction of horizontal walls on natural convection heat transfer in a square cavity is numerically investigated. The vertical walls of the cavity are at different constant temperatures while the outer surfaces of horizontal walls are insulated. A code based on vorticity-stream function is written to solve the governing equations simultaneously over the entire computational domain. The dimensionless wall thickness of cavity is taken as 0.1. The steady state results are obtained for wide ranges of Rayleigh number (10 3 b Ra b 10 6 ) and thermal conductivity ratio (0 b K b 50). The variation of heat transfer rate through the cavity and horizontal walls with Rayleigh number and conductivity ratio is analyzed. It is found that although the horizontal walls do not directly reduce temperature difference between the vertical walls of cavity, they decrease heat transfer rate across the cavity particularly for high values of Rayleigh number and thermal conductivity ratio. Heatline visualization technique is a useful application for conjugate heat transfer problems as shown in this study.

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Natural Convection in a Square Cavity with Spatial Side-Wall Temperature Variation

Cited by 72 publications

References 28 publications

Numerical Study of 2-D Natural Convection in a Square Porous Cavity: Effect of Three Mode Heating

Numerical Study of 2-D Natural Convection in a Square Porous Cavity: Effect of Three Mode Heating

Heat transfer enhancement of mixed convection in a square cavity with inlet and outlet ports due to oscillation of incoming flow

Conjugate natural convection in a square cavity with finite thickness horizontal walls

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