利用三維顆粒顯像儀分析水與土運動之研究(2/3)
Date Issued
2003
Date
2003
Author(s)
DOI
912211E002061
Abstract
The 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.
Publisher
臺北市：國立臺灣大學水工試驗所
Type
report
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