沙床形之三維多顆粒泥砂躍移研究
Date Issued
2004
Date
2004
Author(s)
DOI
922211E002039
Abstract
A series of studies regarding the two
dimensional collision mechanism with the
channel bed and among the saltating particles
were conducted by Garcia and Nino (1994, 1998)
and our group (Chen 1998, You, 1999). The
simulation results are satisfactory. For past
years, our group (Lin 2000, Lee, 2001, Wang,
2002) had extended the experiments to three
dimensional conditions. The bed forms of our
previous experiments were flat bed and formed
by uniformly distributed sediment particles.
However, the bed forms in natural rivers vary
with different flow conditions. Different types of
bed forms, were observed, namely, flat bed,
ripple, dune, antidune, and chutes and pools.
Particles saltation characteristics will definitely
be different under bed forms. The purpose of this
study is to investigate the three dimensional
saltation characteristics on a dune bed, with
special attention on the collision behaviors
between the saltating particles and the channel
bed and interparticle collision behaviors. A three
dimensional flow visualization technique will be
modified and upgraded in this study to measure
the three dimensional saltation trajectories on a
dune bed. Basing on these data, a three
dimensional continuous saltation for multiple
sediment particles will then be developed. This
model will be very helpful in the study of bed
load transport.
Subjects
Bed load
Saltation
3-D flow visualization technique
Dune
Publisher
臺北市：國立臺灣大學水工試驗所
Type
report
File(s)![Thumbnail Image]()
Loading...
Name
922211E002039.pdf
Size
280.27 KB
Format
Adobe PDF
Checksum
(MD5):0e0cd0e0ebf0ee6902e9995f322e3235