Conjugate conduction-natural convection in an enclosure with time-periodic sidewall temperature and inclination

Zhang, Wei; Zhang, Chuhua; Xi, Guang

doi:10.1016/j.ijheatfluidflow.2010.08.006

Cited by 46 publications

(17 citation statements)

References 30 publications

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“…Most of the work carried out in this sense has been devoted to the study of the effects of conduction and/or radiation on natural convection in a differentially heated rectangular block, A part of these works studied the effect of conduction in solid partitions on natural convection [7][8]. Whereas the other part studied the effect of radiation exchange between cavity surfaces on natural convection [9][10].…”

Section: Introductionmentioning

confidence: 99%

Coupled heat transfers in a three cavity hollow block subjected to an incident solar flux: Effect of heat conductivity

Najjaoui¹,

Ait-Taleb²,

Abdelbaki

et al. 2018

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. Hollow blocks or bricks are widely used due to the good thermal insulation, lightweight, and acoustic insulation etc. In this paper, we present a numerical study of heat transfers coupled by natural convection and radiation conduction through a hollow block with three cavities used for the construction of ceilings of buildings. This hollow block is subjected to an incident solar flux and exchanging heat with the air ambient. The governing equations of the mathematical model used for the simulation are discretized by the finite volume method and solved by the SIMPLE algorithm. The main objective of this simulation is to study, in steady state, the effect of the thermal conductivity of the solid partitions on heat flux through this hollow block. The results are presented in terms of streamlines, the isotherms, temperature profiles on the actives surfaces and the obtained global heat flux.

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Section: Introductionmentioning

confidence: 99%

Coupled heat transfers in a three cavity hollow block subjected to an incident solar flux: Effect of heat conductivity

Najjaoui¹,

Ait-Taleb²,

Abdelbaki

et al. 2018

IOP Conf. Ser.: Earth Environ. Sci.

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“…Mobedi (2008) focused on the horizontal conductive walls of conjugate convection in cavities and he showed that the heat transfer rate is also affected by the combination of Rayleigh number and the thermal conductivity ratio. Recently, Zhang, Zhang, and Xi (2011) studied conjugate heat transfer in a tilted enclosure with time-periodic sidewall temperature. They found that the heat transfer rate increases almost linearly with the thermal conductivity ratio and the thermal diffusivity ratio due to wall conduction.…”

Section: Introductionmentioning

confidence: 99%

Conjugate Natural Convection Heat Transfer in a Rotating Enclosure

Saleh

Hashim²

2016

JAFM

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The aim of the present numerical study to analyze the conjugate natural convection heat transfer in a rotating enclosure with finite wall thickness. The enclosure executes a steady counterclockwise angular velocity about its longitudinal axis. The staggered grid arrangement together with the Marker and Cell (MAC) method was employed to solve the governing equations. The governing parameters considered are the wall thickness, 0.05 ≤ D ≤ 0.2, the conductivity ratio, 0.5 ≤ Kr ≤ 10 and the Taylor number, 8.9 × 10 4 ≤ Ta ≤ 1.1 × 10 6 , and the centrifugal force is assumed weaker than the Coriolis force. It is found that decreasing the conductivity ratio or/and rotational speed stabilize of the convective flow and heat transfer oscillation. The global quantity of the heat transfer rate increases by increasing the conductivity ratio and it decreases about 12% by increasing 20% wall thickness for the considered rotational speeds.

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“…Results are presented in steady state so as to appraise thermal efficiency and the solar heat gain coefficient of different solar control films. In reality, heat transfer and fluid flow analysis into rooms are functions of time due to temporal evolution of climate conditions during the day [19][20][21][22][23][24]. Kurtbaz and Aydin [24] carried out a transient numerical simulation for a 3D naturally ventilated cavity.…”

Section: Introductionmentioning

confidence: 99%

Unsteady-RANS simulation of conjugate heat transfer in a cavity with a vertical semitransparent wall

et al. 2015

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Conjugate conduction-natural convection in an enclosure with time-periodic sidewall temperature and inclination

Cited by 46 publications

References 30 publications

Coupled heat transfers in a three cavity hollow block subjected to an incident solar flux: Effect of heat conductivity

Coupled heat transfers in a three cavity hollow block subjected to an incident solar flux: Effect of heat conductivity

Conjugate Natural Convection Heat Transfer in a Rotating Enclosure

Unsteady-RANS simulation of conjugate heat transfer in a cavity with a vertical semitransparent wall

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