CFD simulations of natural cross ventilation through an apartment with modified hourly wind information from a meteorological station

Sumei Liu, Wuxuan Pan, Qing Cao, Zhengwei Long, Yi Jiang, Qingyan Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

34 Citations (Scopus)

Abstract

Natural ventilation in buildings can improve indoor air quality and thermal comfort and reduce air-conditioning use except for highly polluted area. Traditionally, the inflow boundary conditions for calculating natural ventilation used weather data from a meteorological station that is often in a suburb. The use of hour-by-hour wind velocity from the station may give rise to some errors because of the large time step. This investigation proposed a correlation method for converting the hour-by-hour wind velocity from a meteorological station to minute-by-minute velocity, using data measured on the rooftop of the building of interest. A CFD simulation with the coupled modeling method using the unsteady RNG k-ɛ model was performed to calculate airflow around the building and airflow in an apartment simultaneously. The computed outdoor wind velocity and indoor ventilation rate were compared with the corresponding experimental data. The results showed that the simulations calculated the outdoor wind velocity on the building rooftop and the cross-ventilation rate through the apartment with acceptable accuracy.

Original languageEnglish
Pages (from-to)16-25
Number of pages10
JournalEnergy and Buildings
Volume195
DOIs
Publication statusPublished - 15 Jul 2019

Keywords

  • Airflow around building
  • Field measurements
  • Meteorological station
  • Unsteady flow

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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