@article{Tianning CHEN2022, title={Simulation of Free-Falling Solid Body in a Vertical Pipe with Highly Viscous Fluid by Using Moving Particle Semi-implicit (MPS)}, author={Tianning CHEN and Akio OKAYASU}, journal={Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)}, volume={78}, number={2}, pages={I_19-I_24}, year={2022}, doi={10.2208/kaigan.78.2_I_19} }