抄録
Flow rate transition of water discharged from water closet during running down horizontal pipes was simulated numerically. It enabled to obtain the transition of drainage load such as qd value, and approved this simulation could be established as a drainage load transition predicting method. Especially treating Manning's coefficient n as a imitation variable improved the precision of the result. The effect of various drainage pipes' shapes to the flow were also considered, such as locations of bends, and then a wide use simulation program feasibly display real drainage system is aimed to develop.
