Study on the numerical predictive accuracy of wind pressure distributions and air flow characteristics. Part 2: Prediction accuracy of wind pressure distribution of various shaped buildings

In Part 1, it is described that, in overall judgment, the reproduction accuracy is improved when computational fluid dynamics (CFD) is performed using RNG model and the modified model incorporating Durbins limiter (? = 0.65). However, in Part 1, the study was performed on an object with extremely simple shape, and question may arise if this is applied on an actual building. In this respect, we attempted in this study to perform similar evaluation on an object with complicated shape. As a result, it was found that RNG model provides high reproduction accuracy just as in the case of the object with simple shape. Also, it was made clear that there is problem with the model incorporating Durbins limiter (?=0.65) because the object has a complicated shape. Consequently, the modified model incorporating Durbins limiter with a higher value for ? shows better results compared with RNG model.