Analysis of the Validity of a Constant Surface Heat Flux Model for the Case of Blocks Submitted to Uniform Volumetric Heat Generation and Periodically Mounted on the Lower Wall of a Horizontal Channel

Mouhtadi, D.; Amahmid, A.; Hasnaoui, M.; Kadri, El-Hadj; Bennacer, Rachid

doi:10.1080/10407782.2013.812003

Cited by 2 publications

(1 citation statement)

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“…Then, four different gradient functions are applied as showed in Figure 3 in order to reach an optimal shape to the effective heat transfer properties. Numerical method: Based on the finite volume method, a specially made device developed to study flows in porous media [12] through energy and momentum equations has been adopted in our study. This formulation takes into account, in the field of heat transfer, the conductive and convective transfers.…”

Section: Analysis and Modellingmentioning

confidence: 99%

Flow and heat transfer in anisotropic active foam porous media wall

Deptulski¹,

Bennacer²,

Vieira

2020

MATEC Web Conf.

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The development of positive-energy buildings is nowadays an important societal challenge and the research objective of many laboratories. Working towards this direction, we describe in the present report the development of active and reactive walls, by employing a multi-fiber, volumetrically structured porous medium. Flow and transfer characterization in such a foam structure is not fully understood due to the strong nonlinearities included. These are amplified by heterogeneities and porosity changes, where the local and global flow affect the thermal field and the resulting heat transfer. Thus, a finite volume method with immersed structure interfaces was implemented to study heat transfer through these media, with the aim of obtaining their ratio equivalent to fluid thermal conductivity (i.e. Nusselt number). Furthermore, our analysis shows that in such active wall constituted by two solid phases, under fixed weight constraints, the optimal value is difficult to predict a priori. Thus, different evolution laws of thermal gradient were studied, resulting in the change of the pore size distribution along some new anisotropic structures, in order to achieve the most one predictive.

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Section: Analysis and Modellingmentioning

confidence: 99%