Efficient coupling of multizone and CFD indoor flow models through proper orthogonal decomposition

H. Ezzat Khalifa, Basman Elhadidi, John F. Dannenhoffer

Research output: Contribution to journalConference Articlepeer-review

9 Scopus citations


This paper describes a novel approach for efficiently coupling computational fluid dynamics (CFD) and lumped-parameter flow network zonal (FNZ) models in order to predict the flow and contaminant distribution in a nonuniform open space (NOS) connected to one or more suites of well-mixed offices through corridor openings. The NOS represents a room where the spatial gradients of velocity or concentration are of practical significance. Such coupling is required for near-real-time flow control and/or contaminant dispersion and containment applications. To achieve optimal coupling, the order of the CFD solutions is reduced through proper orthogonal decomposition. Such decomposition is used to predict, in near real time and with high fidelity, the flow and contaminant fields in the NOS, given the flow and concentration conditions at the interface between the FNZ and NOS. The model capabilities are demonstrated for a single NOS connected to one suite of offices.

Original languageEnglish (US)
Pages (from-to)282-289
Number of pages8
JournalASHRAE Transactions
Volume113 PART 2
StatePublished - 2007
Event2007 ASHRAE Annual Meeting - Long Beach, CA, United States
Duration: Jun 23 2007Jun 27 2007

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering


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