TITLE:
Investigating the Effect of Relative Width on Momentum Transfer between Main Channel and Floodplain in Rough Rectangular Compound Channel Sunder Varius Relative Depth Condition
AUTHORS:
Shima Bahadori, Mehdi Behdarvandi Askar
KEYWORDS:
Compound Channel, Momentum Transfer, Relative Roughness, Relative Depth, Relative Width
JOURNAL NAME:
Open Journal of Geology,
Vol.6 No.4,
April
13,
2016
ABSTRACT: Compound section is
referred to a section the surface of which is made of several sub-sections with
different flow characteristics. The difference in the hydraulic and geometry
characteristics causes a complexity in flow hydraulic and creates an
interaction between the main channel and floodplains, resulting in an apparent
shear stress and a transverse momentum transfer. The amount of such a stress
plays an important role in many river engineering measures[1]. Due to the flow complexity, the
common approximate analytical methods are not enough to identify the flow
profile. The FLOW3D Software with its great features in three-dimensional
analysis of flow field is used as a tool to investigate the shear stress in a
direct symmetrical compound rectangular channel. After the simulation of
models, it is found that an increase in the relative width and relative depth
parameters decreases the percentage of apparent shear stress and an increase in
the relative roughness causes it to be increased[2].