Embedded detailed analysis integrating CFD with multizone methods of building airflow analysis
Axley, J. W.
2007 The 6th International Conference on Indoor Air Quality, Ventilation & Energy Conservation in Buildings IAQVEC , Oct. 28 - 31
Axley, J. W., (2007), "Embedded detailed analysis integrating CFD with multizone methods of building airflow analysis", The 6th International Conference on Indoor Air Quality, Ventilation & Energy Conservation in Buildings IAQVEC , Oct. 28 - 31.
Abstract:
Methods of computational fluid dynamics (CFD) have been applied to predict the details of air, contaminant and thermal transport within isolated building zones, yet zone transport processes do not occur in isolation ¨C they result from and interact with transport from the larger building system in which they are embedded. Consequently, there is a growing interest in combining CFD models of individual zones within multizone models of enclosing building systems to more faithfully model both the larger building interactions and the intrazonal details. In the rush to combine these modeling capabilities, however, few have paused to consider the problem of embedded detailed analysis fundamentally. A fundamental approach based on mathematically coupling the CFD equations governing microscopic airflow in the embedded zone(s) to port plane formulations of the multi-zone equations governing macroscopic airflow in the enclosing building system will be presented. Specifically, finite element approximations of both the Stokes Flow and the Reynolds Average Navier Stokes (RANS) equations will be coupled to port plane formulations of the multizone equations and applied to a test case problem to illustrate the advantages of the approach and, yet, the limitations of embedded analysis in general.
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