IASS-IACM 2008 Session: Modeling and Simulation of Discontinua -- Session Organizer: Shang-Hsien HSIEH (National Taiwan University) -- Keynote Lecture: "The roots of possible chaotic behavior in modeling and simulation of discontinua" by Antonio MUNJIZA (University of London), T. CARNEY, E. KNIGHT, R.P. SWIFT, D. GREENING, D. STEEDMAN (Los Alamos National Laboratory) -- "Motion analysis of mixed polyhedral and ellipsoidal particles" by Chung-Yue WANG , Jopan SHENG, Chih-Jung HUANG, Ming-Hong CHEN (National Central University) -- "A fluid-particle simulation for two-phase granular flow" by Li-Pen WANG, Ying-Pao LIAO, Chuin-Shan CHEN , Fu-Ling YANG, Shang-Hsien HSIEH (National Taiwan University) -- "Discrete element simulation of a collision-rich solid-liquid flow using a liquid-modified contact model" by Fu-Ling YANG , Wei-Tze CHANG, Shang-Hsien HSIEH, Chuin-Shan CHEN (National Taiwan University)