Airflow pattern and performance analysis of diffuse ceiling ventilation in an office room using cfd study

Chen Zhang, Qingyan Chen, Per K. Heiselberg, Michal Z. Pomianowski

Research output: Unpublished conference presentation (presented paper, abstract, poster)Conference presentation (not published in journal/proceeding/book)Academic researchpeer-review

3 Citations (Scopus)


Diffuse ceiling ventilation uses perforations in the suspended ceiling to deliver air into the occupied zone. Due to the complex geometry of the diffuser, it is not possible to build an exact geometrical model in CFD simulation. Two numerical models are proposed in this study, one is a simplified geometrical model and the other is a porous media model. The numerical models are validated by the full-scale experimental studies in a climate chamber. The results indicate that porous media model performed better on predicting air flow characteristic below diffuse ceiling and air velocity near the floor. However, the simplified geometrical model shows superior performance on calculating the diffuse ceiling surface temperature.

Original languageEnglish
Number of pages8
Publication statusPublished - 2015
Event14th Conference of International Building Performance Simulation Association, BS 2015 - Hyderabad, India
Duration: 7 Dec 20159 Dec 2015


Conference14th Conference of International Building Performance Simulation Association, BS 2015

ASJC Scopus subject areas

  • Computer Science Applications
  • Architecture
  • Modelling and Simulation
  • Building and Construction

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