楊德良2006-07-252018-07-092006-07-252018-07-092003http://ntur.lib.ntu.edu.tw//handle/246246/9912The three-year research programme pursues the development of novel experimental methods for the laboratory study of debris flows and flowslides. Transparent access to the micromechanics of liquid-granular flows is sought through a combination of three components: 1) liquid and granular media with special optical properties allowing unhindered 3D imaging; 2) a tilting flume equipped with two recirculation circuits for the liquid and granular phases; 3) digital imaging algorithms allowing acquisition and analysis of the 3D particle flow field inside the bulk. Over the programme’s second year, progress has been made in all three areas. The highlight has been the successful acquisition of a set of 3D measurements of particle motions in a dense solid-liquid mixture. These measurements were made in a pilot fluidisation cell apparatus which is now fully operational. The feasibility of the measurement technique based on refractive index matching, laser marking, and stereo imaging has thus been demonstrated for the first time. A second milestone has been the completion of the large-scale double recirculation flume apparatus. Pending the solution of some technical problems, chief among them fatigue failure of the high-speed conveyer belt, the apparatus is now nearly operational. Finally, progress has been made in developing computational tools for the analysis and simulation of solid-liquid flow fields. The results obtained and tasks remaining are detailed below under the following four headings: 1) pilot fluidisation tests; 2) double-recirculation flume apparatus; 3) three dimensional particle tracking; 4) liquid-solid flow simulations.application/pdf1225068 bytesapplication/pdfzh-TW國立臺灣大學水工試驗所reporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/9912/1/912211E002061.pdf