Convection heat transfer due to protruded heat sources in an enclosure

Chen, L.; Keyhani, M.; Pitts, D. R.

doi:10.2514/3.250

Cited by 8 publications

(2 citation statements)

References 6 publications

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“…An investigation of the convection heat transfer due to protruded heat sources with glycol as the working fluid in an enclosure is conducted by Chen et al (1991). Visualizations of flow patterns under several power inputs show a core flow within the enclosure as well as a recirculating cell in the gap between heaters.…”

Section: Introductionmentioning

confidence: 99%

Applied Thermal Lattice Boltzmann Model for Fluid Flow of Free Convection in 2-D Enclosure with Localized Two Active Blocks: Heat Transfer Optimization

Naffouti

Zinoubi

Sidik³

et al. 2016

JAFM

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The aim of this paper is to analyze the laminar free convective flow generated by two identical hot blocks in two-dimensional enclosure cooled by the sides in order to optimize the heat transfer. The top wall and the flat surfaces on bottom wall are adiabatic except for the active sources located symmetrically. Each source of a rectangular form is heated at a uniform temperature while the Prandtl number is fixed at 0.71. Thermal Lattice Boltzmann model of D2Q4-D2Q9 is applied to solve the thermal flow problem. Numerical simulations have been conducted to reveal the effects of various parameters; Rayleigh number 10 3 ≤ Ra ≤ 10 6 , spacing between blocks 0.1 ≤ D ≤ 0.6, block height 0.05 ≤ H ≤ 0.4 and aspect ratio of the enclosure 1 ≤ A ≤ 4 on fluid flow and heat transfer. The computational results by Lattice Boltzmann method have been found to be in good agreement with previous works. The results are presented in the form of isotherms and streamlines plots as well as the variation of the average Nusselt number along horizontal and vertical hot walls. It is found that increasing Rayleigh number and distance between active blocks enhance the heat transfer. The simulations show that the block height and aspect ratio are the most important parameters affecting dynamic and thermal fields and consequently the heat transfer efficiency in the enclosure.

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Section: Introductionmentioning

confidence: 99%

Applied Thermal Lattice Boltzmann Model for Fluid Flow of Free Convection in 2-D Enclosure with Localized Two Active Blocks: Heat Transfer Optimization

Naffouti

Zinoubi

Sidik³

et al. 2016

JAFM

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“…The SIMPLER algorithm is used to couple the continuity and momentum equations. The reader should refer to reference [3] for details of this algorithm.…”

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confidence: 99%

Coupled Thermal / Electrical Analysis of High Powered Electrical Systems

Zandi¹,

Lewis²,

Lewis³

et al.

Thermal and Thermomechanical Proceedings 10th Intersociety Conference on Phenomena in Electronics Systems, 2006. ITHERM 2006.

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This paper describes an approach based on coupled electrical, thermal and CFD analysis to predict the thermal performance of Bussed electrical centers and junction blocks. Typically from 200 to 400 amps flow trough various circuitries, which lead to a significant amount of Joule heat dissipation that is responsible for the majority of heat loss in the system. The Joule heat dissipation distribution is not known prior to the solution and must be evaluated by simultaneously solving the electrical field. This can be accomplished through a "coupled electrical, thermal solution" scheme, where the voltage field is solved throughout the region using the electrical loads and boundary conditions (in addition to thermal and flow fields) during each iteration. The most recent temperature field is used to update the electrical resistivity of the conductors in the model. The power dissipation is then calculated and updated for all conductor elements.In this paper, a thermal/electrical/CFD model of a typical Bussed Electrical Center (BEC) consisting of several relays, diodes and switches is discussed. The procedure for coupling the electrical and thermal effects is presented using 3D views of various circuitries. A discussion relating to the application of electrical boundary conditions (voltage and current BC's) is presented, followed by a detailed discussion of flow, thermal and voltage fields.

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A study of natural convection heat transfer in a vertical rectangular enclosure with two-dimensional discrete heating: Effect of aspect ratio

Chang

1994

International Journal of Heat and Mass Transfer

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Convection heat transfer due to protruded heat sources in an enclosure

Cited by 8 publications

References 6 publications

Applied Thermal Lattice Boltzmann Model for Fluid Flow of Free Convection in 2-D Enclosure with Localized Two Active Blocks: Heat Transfer Optimization

Applied Thermal Lattice Boltzmann Model for Fluid Flow of Free Convection in 2-D Enclosure with Localized Two Active Blocks: Heat Transfer Optimization

Coupled Thermal / Electrical Analysis of High Powered Electrical Systems

A study of natural convection heat transfer in a vertical rectangular enclosure with two-dimensional discrete heating: Effect of aspect ratio

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