@inproceedings{oai:jaxa.repo.nii.ac.jp:00020663,
 author = {和田, 浩二 and 千秋, 博紀 and 松井, 孝典 and Wada, Koji and Senshu, Hiroki and Matsui, Takafumi},
 book = {第36回月・惑星シンポジウム, Proceedings of the 36th ISAS Lunar and Planetary Symposium},
 month = {Nov},
 note = {Excavation flow in impact cratering has been usually modeled by Maxwells Z-model. However few laboratory experiments and/or numerical simulations have been done to examine whether or not the Z-model's streamlines actually express the excavation flow. A numerical simulation of impact onto granular materials by the Discrete Element Method (DEM) is suitable to trace directly the trajectories of target particles. Then a numerical code was developed to simulate impact onto granular materials. The results show that the target particles move along the Z-model's streamlines in the following cases: Z = 3 (effective origin of flow (EOF) is located at the target surface) or Z = 2.7 (EOF is located at the depth of one projectile radius). These results indicate that the Z-model is a reasonable first-order quantitative approximation for excavation flow in impact cratering process., 資料番号: AA0046650014},
 pages = {53--56},
 publisher = {宇宙航空研究開発機構宇宙科学研究本部, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)},
 title = {Numerical simulation of excavation flow using the discrete element method},
 year = {2003}
}