Modelling and simulation of the near-wall velocity of a turbulent ceiling attached plane jet after its impingement with the corner

Guangyu Cao*, Mika Ruponen, Risto Paavilainen, Jarek Kurnitski

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    20 Citations (Scopus)

    Abstract

    At present, ceiling-mounted diffusers are very popular for indoor air distribution, particularly in offices, owing to greater efficiency in the distribution of the air supply and a more comfortable indoor environment. The objective of this study is to construct an effective model to design the indoor airflow of an attached plane jet after its impingement with the corner in a room. In this study, a full-scale test facility was set up to obtain detailed experimental data. One commercial CFD tool, CFX 11.0, was used to simulate the air velocity distribution of an attached plane air jet bounded by the ceiling and an insulated wall. One semi-empirical model was also constructed to predict the impingement jet velocity. The results show that bout the semi-empirical model and CFX 11.0 were able to predict the maximum velocity of an impinging jet at low Reynolds numbers, 1000 and 2000, with an inaccuracy of ±11%. However, the semi-empirical model could be more conveniently used to predict the maximum jet velocity decay after its impingement the corner in a room than CFD simulation in terms of accuracy and the time required to design the indoor airflow pattern.

    Original languageEnglish
    Pages (from-to)489-500
    Number of pages12
    JournalBuilding and Environment
    Volume46
    Issue number2
    DOIs
    Publication statusPublished - Feb 2011
    MoE publication typeA1 Journal article-refereed

    Keywords

    • Air distribution
    • Attached plane jet
    • CFD
    • Jet impingement
    • Maximum jet velocity

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