Abstract
The study proposes a simulation method for identifying fixture discharge characteristics of water-saving toilets, when the toilets are connected to horizontal drainpipes in various configurations, and for predicting the carrying performance in the horizontal drainpipes, using realistic waste. The study also verifies the effectiveness of the simulation method. In the previous report, a JIS-approved water-saving toilet was connected to various piping configurations, and a calculation model was proposed, with which the waste carrying performance was calculated on the basis of the magnitude of the carrying force, which was calculated from the fixture discharge characteristic values when the toilet was flushed with clean water, and the magnitude of friction generated with an artificial waste substitute. The previous report also examined the effectiveness of the model. This report focuses on the actual use of toilet paper and adds to the previous calculation model the pressure (to push the toilet paper) due to the drained water during a pipe blockage caused by toilet paper, in order to develop a new calculation method for predicting the performance (the distance) of carrying toilet paper having a complicated shape, as well as examining the appropriateness of the method.
