NCEUB Conferences, MC2014 Masters Conference People and Buildings

Font Size: 
Investigate the method for using CFD techniques to simulate buoyancy driven ventilation and thermal mass
Junji Zhu

Date: 2014-09-19 12:00 PM – 12:10 PM
Last modified: 2014-09-18


With the growing consideration of building energy consumption and indoor thermal comfort, coupling thermal mass with buoyancy driven ventilation has become a popular technique for sustainable building design. It is important for the designer to understand the complex airflow characteristics of natural ventilation coupled with the effects of thermal mass. Transient CFD simulation is a potential tool to simulate and analyze the dynamic performance of combined thermal mass and natural ventilation. The aim of this study is to investigate the method for using CFD techniques to simulate buoyancy driven natural ventilation and thermal mass using a commercial CFD code. A simple box model and a typical naturally ventilated classroom model were used for this study as two benchmarks cases. The settings for boundary conditions and time steps are investigated. The results show that transient CFD simulations can effectively predict the thermal mass effect on buoyancy-driven ventilation and indoor thermal comfort.