Ryoichi OHNO
Particle]based simulations are widely used in fluid engineering applications such as analysis of river flows, tidal waves and tsunamis. In this work, Position Based Fluids (PBF), which is particle]based fluid solver that is also capable of handling rigid particles, is used for a driftwood simulator in three dimensions. In the simulator, stream flows are expressed by fluid particles and driftwoods by rigid particles of PBF. The result of the waterway experiment conducted by Shibuya et al. in 2010 is compared with the results obtained from the driftwood simulator; two problems are identified. One is that the particles pass through the wall instead of colliding against it, and the other is that there is no surface friction between woody debris in contact. To solve the latter problem, spring elements are incorporated between woody particles in contact, and the simulator obtains suitable results for Shibuya's experiment.
Key wordsFdriftwood, woody debris, particle, water flow, three dimensions, simulator