Conjugate Problems in Convective Heat Transfer: Review

Dorfman, A. Sh.; Renner, Zachary

doi:10.1155/2009/927350

Cited by 58 publications

(38 citation statements)

References 133 publications

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“…This problem is referred in literature as conjugate heat transfer (CHT). Dorfman and Renner [11] presented a review of the approaches employed to face this problem. A detailed description of the main coupling strategies can be found in the work of Duchaine et al [12,13], who also analysed the numerical stability and efficiency of the coupling algorithms.…”

Section: Introductionmentioning

confidence: 99%

Large-eddy simulation of thin film evaporation and condensation from a hot plate in enclosure: First order statistics

Cintolesi

Petronio²,

Armenio

2016

International Journal of Heat and Mass Transfer

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Numerical investigation of water evaporation and condensation in buoyancy driven flow, along with the thermal coupling between fluid and surrounding solids, is interesting for many industrial applications. The physical complexity of the evaporation and condensation processes, the mutual thermal influence of water change of phase and solid-fluid heat transfer, the anisotropy of turbulence quantities are challenging problems from numerical and theoretical side. The archetypal case of a vertical hot plate inside a cold square enclosure, filled with humid air, is studied. The solid surfaces are wetted by a thin water film. The plate cooling process due to film evaporation is analysed. Numerical simulation adopts the large-eddy methodology along with the dynamic Lagrangian sub-grid scale model. The conjugate heat transfer technique accounts for the solid-fluid thermal coupling, while the water phase is modelled under the thin film assumption. First, a preliminary case with isothermal solid boundaries and fixed film thickness is reproduced at Ra=5×108. The absence of surface heat transfer leads to analogous distribution of temperature and humidity. The cavity is characterised by strong stratification that confines the motion in the upper part. The same setting is used to simulate the case of dry air. It is found that the presence of vapour increases the velocity by a maximum of 20%. Also, the heat transfer generated by the water change of phase, in case of humid air, overcomes the other heat transfer modes. Successively, conjugate heat transfer and water film model are activated, and three cases are studied changing the plate material. The specific heat ρCp of materials is the parameter controlling the plate cooling process, that is mainly due to evaporation and the evolution of the thermodynamic field within the enclosure. An analysis of the dew-point temperature suggests that recondensation onto the plate surface cannot occur, even for materials that are rapidly cooled

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Section: Introductionmentioning

confidence: 99%

Large-eddy simulation of thin film evaporation and condensation from a hot plate in enclosure: First order statistics

Cintolesi

Petronio²,

Armenio

2016

International Journal of Heat and Mass Transfer

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“…Owing that the heat conduction in the thick plate and forced convection boundary later flow are coupled at the interface (between the thick plate and the cooling fluid), the system under investigation is classified as a conjugated forced convective system [10][11][12][13][14]. In such a system, the heat source is cooled under the thick plate instead of being cooled in direct contact with the fluid.…”

Section: Introductionmentioning

confidence: 99%

Effects of a Thick Plate on the Excess Temperature of Iso-Heat Flux Heat Sources Cooled by Laminar Forced Convection Flow: Conjugate Analysis

Hajmohammadi¹,

Moulod²,

Shariatzadeh³

et al. 2014

Numerical Heat Transfer, Part A: Applications

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A conjugate analysis via the finite volume approach is performed to study the effects of a thick plate on the excess (peak) temperature of an iso-heat flux heat source cooled by laminar forced convection flow. A thick plate of temperature-dependent thermal conductivity is placed between the heat sources and the cooling fluid. A cooling fluid flows over the thick plate and removes the heat by laminar forced convection. On account of the two-dimensional heat redistribution in the finite thick plate with one face subjected to iso-heat flux and the other face exposed to forced flow, the interface ceases to be an iso-heat flux and, consequently, reduces the excess temperature of the heat sources. In the numerical analysis, the thickness of the plate is relaxed one by one to search for the optimal thickness that minimizes the excess temperature. It is shown that the reduction in the excess temperature due to the insertion of the thick plate with optimal thickness depends upon the Reynolds number of the fluid flow and the fluid-to-solid thermal conductivity ratio.

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“…While investigating the relative performance of the two heated surfaces, he showed that the fin surface is highly effective compared with the inner pipe surface in promoting the convective heat transfer. Dorfman and Renner [14] presented their review on the conjugate problems on heat transfer. They discussed the analytical 2 Mathematical Problems in Engineering solutions of such problems.…”

Section: Introductionmentioning

confidence: 99%

A Conjugate Heat Transfer Analysis of a Triangular Finned Annulus Based on DG-FEM

Ishaq

Syed

Iqbal³

et al. 2018

Mathematical Problems in Engineering

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A DG-FEM based numerical investigation has been performed to explore the influence of the various geometric configurations on the thermal performance of the conjugate heat transfer analysis in the triangular finned double pipe heat exchanger. The computed results dictate that Nusselt number in general rises with values of the conductivity ratio of solid and fluid, for the specific configuration parameters considered here. However, the performance of these parameters shows strong influence on the conductivity ratio. Consequently, these parameters must be selected in consideration of the thermal resistance, for better design of heat exchanger.

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Conjugate Problems in Convective Heat Transfer: Review

Cited by 58 publications

References 133 publications

Large-eddy simulation of thin film evaporation and condensation from a hot plate in enclosure: First order statistics

Large-eddy simulation of thin film evaporation and condensation from a hot plate in enclosure: First order statistics

Effects of a Thick Plate on the Excess Temperature of Iso-Heat Flux Heat Sources Cooled by Laminar Forced Convection Flow: Conjugate Analysis

A Conjugate Heat Transfer Analysis of a Triangular Finned Annulus Based on DG-FEM

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