Author(s)

Shima Bahadori¹, Mehdi Behdarvandi Askar^2*

¹Master’s Student, Department of Offshore Structures, Faculty of Marine Engineering,Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran.
²Assistant Professor, Department of Offshore Structures, Faculty of Marine Engineering,Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran.

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].

Compound Channel, Momentum Transfer, Relative Roughness, Relative Depth, Relative Width

Bahadori, S. and Askar, M. (2016) Investigating the Effect of Relative Width on Momentum Transfer between Main Channel and Floodplain in Rough Rectangular Compound Channel Sunder Varius Relative Depth Condition. Open Journal of Geology, 6, 225-231. doi: 10.4236/ojg.2016.64020.