To Establish Better Evaluating Method in Pedestrian Wind Environment

• Main Authors: Chia-Ming Pan, 潘家銘
• Other Authors: Cheng-Hsin Chang
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/56912861679713420257

碩士 === 淡江大學 === 土木工程學系 === 92 === The purpose of this thesis is to find a better method to evaluate pedestrian level wind environment from computational fluid dynamics simulation, wind tunnel tests and field surveys. Previous studies of the wind environmental problems were done by wind tunnel tests or simple numerical models which only concerned about simple geometric structure shapes, such as cubes. However, these two methods have some limitations which discussed in this thesis. On the other hand, there are not only buildings but various blocking objects those can make influence of wind environment, such as plants. That means we should take it into account to decrease the error generated by other objects in numerical models. Plants to add in the numerical models made the calculating domain of CFD very complicated due to meshing problems. As for this, the default function in FLUENT — “Porous Media Condition” added plants in numerical model without mesh increasing. Comparison results between numerical and wind tunnel model were closed if well adjustments of the parameters of porous media condition. By doing several comfortable surveys in wind tunnel laboratory and fields in different wind conditions, we established new comfort criteria of pedestrian wind environment suitable for people in Taiwan. Because of restricts and shortages of wind tunnel experiment facilities, we prefer to take the site data as a judging foundation. At last, one can evaluate pedestrian wind environment by putting those modeling results considering plants effect into the criteria through the same method.