### Resumé

Originalsprog | Engelsk |
---|---|

Titel | Healthy Buildings 2012 : 10th International Conference |

Antal sider | 6 |

Forlag | Queensland University of Technology |

Publikationsdato | 2012 |

ISBN (Elektronisk) | 978-1-921897-40-5 |

Status | Udgivet - 2012 |

Begivenhed | Healthy Buildings 2012 Conference: 10th International Conference - Brisbane Convention & Exhibition Centre, Brisbane, Australien Varighed: 8 jul. 2012 → 15 jul. 2012 Konferencens nummer: 10 |

### Konference

Konference | Healthy Buildings 2012 Conference |
---|---|

Nummer | 10 |

Lokation | Brisbane Convention & Exhibition Centre |

Land | Australien |

By | Brisbane |

Periode | 08/07/2012 → 15/07/2012 |

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*Healthy Buildings 2012: 10th International Conference*Queensland University of Technology.

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*Healthy Buildings 2012: 10th International Conference.*Queensland University of Technology, Brisbane, Australien, 08/07/2012.

**Numerical predictions of the discharge coefficient of a window with moveable flap.** / Iqbal, Ahsan; Nielsen, Peter V.; Afshari, Alireza; Heiselberg, Per.

Publikation: Bidrag til bog/antologi/rapport/konference proceeding › Konferenceartikel i proceeding › Forskning › peer review

TY - GEN

T1 - Numerical predictions of the discharge coefficient of a window with moveable flap

AU - Iqbal, Ahsan

AU - Nielsen, Peter V.

AU - Afshari, Alireza

AU - Heiselberg, Per

PY - 2012

Y1 - 2012

N2 - Discharge coefficient and wind-pressure coefficient are the key input parameters for estimating the airflow rates in naturally ventilated building designs. This paper focuses on the study of the discharge coefficient (CD) in case of a moveable (bottom-hinged) window flap. Computational fluid dynamics (CFD) techniques are used for estimating the airflow through the window. Focus is given to the window on the windward side of the building. The first objective of this study is to validate the k-ε turbulent model for the estimation of airflow rates through the window. It is done by comparing the numerical results with existing results of full-scale measurements under a laboratory conditions. The second objective is to find an accurate method to estimate the airflow rate (using orifice plate equation) in the case of a window with a moveable flap. It is done by using CFD predictions together with the validated turbulent model. A single value of CD (usually 0.6 to 0.65) is not appropriate for the operable window with moveable flap. The results of the simulation validates that the k-ε turbulent model can predict the airflow rates within an acceptable range, when the pressure difference (across the opening) is higher than 0.5 Pa. This study also confirms that the single value of the CD is not sufficient for a window with moveable flap. At the end, a more accurate method is presented for estimating the airflow through a window with moveable flap.

AB - Discharge coefficient and wind-pressure coefficient are the key input parameters for estimating the airflow rates in naturally ventilated building designs. This paper focuses on the study of the discharge coefficient (CD) in case of a moveable (bottom-hinged) window flap. Computational fluid dynamics (CFD) techniques are used for estimating the airflow through the window. Focus is given to the window on the windward side of the building. The first objective of this study is to validate the k-ε turbulent model for the estimation of airflow rates through the window. It is done by comparing the numerical results with existing results of full-scale measurements under a laboratory conditions. The second objective is to find an accurate method to estimate the airflow rate (using orifice plate equation) in the case of a window with a moveable flap. It is done by using CFD predictions together with the validated turbulent model. A single value of CD (usually 0.6 to 0.65) is not appropriate for the operable window with moveable flap. The results of the simulation validates that the k-ε turbulent model can predict the airflow rates within an acceptable range, when the pressure difference (across the opening) is higher than 0.5 Pa. This study also confirms that the single value of the CD is not sufficient for a window with moveable flap. At the end, a more accurate method is presented for estimating the airflow through a window with moveable flap.

UR - http://www.scopus.com/inward/record.url?scp=84883334713&partnerID=8YFLogxK

M3 - Article in proceeding

BT - Healthy Buildings 2012

PB - Queensland University of Technology

ER -