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

Guangyu Cao (Corresponding Author), Mika Ruponen, Risto Paavilainen, Jarek Kurnitski

Research output: Contribution to journalArticleScientificpeer-review

18 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
JournalBuilding and Environment
Volume46
Issue number2
DOIs
Publication statusPublished - 2011
MoE publication typeA1 Journal article-refereed

Fingerprint

Ceilings
air
simulation
modeling
Air
airflow
Computational fluid dynamics
indoor air
Test facilities
Velocity distribution
Reynolds number
supply
efficiency
present
distribution

Keywords

  • Attached plane jet
  • air distribution
  • CFD
  • jet impingement
  • maximum jet velocity

Cite this

Cao, Guangyu ; Ruponen, Mika ; Paavilainen, Risto ; Kurnitski, Jarek. / Modelling and simulation of the near-wall velocity of a turbulent ceiling attached plane jet after its impingement with the corner. In: Building and Environment. 2011 ; Vol. 46, No. 2. pp. 489-500.
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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.",
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Modelling and simulation of the near-wall velocity of a turbulent ceiling attached plane jet after its impingement with the corner. / Cao, Guangyu (Corresponding Author); Ruponen, Mika; Paavilainen, Risto; Kurnitski, Jarek.

In: Building and Environment, Vol. 46, No. 2, 2011, p. 489-500.

Research output: Contribution to journalArticleScientificpeer-review

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PY - 2011

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AB - 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.

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