The Size Effects to the Wind Environment of Traditional Chinese Siheyuan Buildings

Abstract

Series of numerical simulations were conducted to investigate the effects of backyard depth to the wind environment of the atrium. In the first stage of this study it was found that the original designed narrow backyard is not conducive to induce wind flow into atrium. A CFD software was adopted to simulate the wind distribution with variant backyard depth. And the result shown, if the depth of backyard might allow the wake vortex to shed from the main house roof and formatted well then the velocity in the atrium would be increase. Not only the mean velocities were checked, also the uniformity of velocity in the atrium had be inspected. We found that the deeper backyard would increase the mean velocity contemporary . In the real situation of building sites, there might not be enough space for the backyard. In this study one more aisle was put beside the main house to check its effects . And the calculation results shown, that the two ailses will improve the flow rate from atrium to backyard even in the layout of original design and the wind environments also be improved. With this results it is evident that will also good for the natural ventilation and pollutant matter dispersed.