Impact of multizone model boundary conditions on the CFD prediction of room airflow and contaminant concentrations distribution

Jacques Ndione, Hiroshi Yoshino, Akashi Mochida

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Coupling CFD and muitizone models can avoid their respective drawbacks in predicting airflow and contaminant concentrations distribution in buildings. Two kinds of boundary conditions are commonly exchanged between them. The muitizone model can give either pressure or mass flowrate boundary conditions to CFD. This study analyzes in detail the impact of each of the boundary types on the CFD domain, and compares them with a full CFD simulation without coupling. This study shows that in coupling CFD with muitizone, the accuracy of the CFD prediction part depends mainly on the accuracy of the boundary conditions being imposed at their interface. When modeling a very small opening, pressure boundary conditions give slightly more accurate results. For a moderate opening height, both pressure and flow rate boundary conditions show good agreement with the CFD-only simulation. For a large opening, the mass flow rate boundary conditions are better to use.

Original languageEnglish
Title of host publicationIAQVEC 2007 Proceedings - 6th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings
Subtitle of host publicationSustainable Built Environment
Pages467-474
Number of pages8
Publication statusPublished - 2007 Dec 1
Event6th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings: Sustainable Built Environment, IAQVEC 2007 - Sendai, Japan
Duration: 2007 Oct 282007 Oct 31

Publication series

NameIAQVEC 2007 Proceedings - 6th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings: Sustainable Built Environment
Volume2

Other

Other6th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings: Sustainable Built Environment, IAQVEC 2007
CountryJapan
CitySendai
Period07/10/2807/10/31

Keywords

  • CFD
  • Exchange of boundary conditions
  • Muitizone models

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment

Fingerprint Dive into the research topics of 'Impact of multizone model boundary conditions on the CFD prediction of room airflow and contaminant concentrations distribution'. Together they form a unique fingerprint.

Cite this