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Modélisation numérique de la thermoaéraulique du bâtiment: des modèles CFD à une approche hybride volumes finis / zonale

Abstract : For 3D modelling of thermo-aeraulics in building using field codes, it is necessary to reduce the computing time in order to model increasingly larger volumes. The solution suggested in this studdy is to couple two modellings: a zonal approach and a CFD approach. The first part of the work that was carried out is the setting of a simplified CFD modelling. We propose rules for use of coarse grids, a constant effective viscosity law and adapted coefficients for heat exchange in the framework of building thermo-aeraulics. The second part of this work concerns the creation of fluid Macro-Elements and their coupling with a calculation of CFD finite volume type. Depending on the boundary conditions of the problem, a local description of the driving flow is proposed via the installation and use of semi-empirical evolution laws. The Macro-Elements is then inserted in CFD computation: the values of velocity calculated by the evolution laws are imposed on the CFD cells corresponding to the Macro-Element. We use these two approaches on five cases representative of thermo-aeraulics in buildings. The results are compared with experimental data and with traditional RANS simulations. We highlight the significant gain of time that our approach allows while preserving a good quality of numerical results.
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https://tel.archives-ouvertes.fr/tel-00007009
Contributor : Axel Bellivier <>
Submitted on : Friday, October 1, 2004 - 10:49:44 AM
Last modification on : Monday, October 19, 2020 - 11:00:06 AM
Long-term archiving on: : Friday, April 2, 2010 - 8:22:51 PM

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  • HAL Id : tel-00007009, version 1

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Axel Bellivier. Modélisation numérique de la thermoaéraulique du bâtiment: des modèles CFD à une approche hybride volumes finis / zonale. Energie électrique. Université de la Rochelle, 2004. Français. ⟨tel-00007009⟩

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