Investigation of Fluid Flow Behavior in Fixed and Adjustable Hydraulic Channels

Zainab Al-Khafaji; Talib Abdulameer  Jasim; Mohammad  Qraywi

doi:10.30572/2018/KJE/170109

Authors

Zainab Al-Khafaji Department of Civil Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia.
Talib Abdulameer Jasim Department of Aeronautical Technical Engineering, College of Technical Engineering, Al-Farahidi University, Baghdad, Iraq
Mohammad Qraywi Department of Civil Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia

DOI:

https://doi.org/10.30572/2018/KJE/170109

Keywords:

Channels shapes, Fixed and movable channels, Computational Fluid Dynamics (CFD)

Abstract

Challenges of open-channel flow are discussed, with emphasis on energy dissipation and the difficulties brought by channel design for hydraulic pressure and velocity measure. The influence of the rheology of the slurry on channel design is also complicated. The objective of this work is to study the flow behavior in open channels of different shapes and with variable wall stability (fixed and movable). ANSYS Fluent (Release 2, 2021) Computational Fluit Dynamic (CFD) simulations were performed for the velocity distribution and pressure profiles in four configurations of channels: parallel, zigzag, wavy and curved. The study examines the effects of channel height variations and various inlet velocity (6, 3, and 0.3 m/s) on flow behavior. Findings indicate that increasing channel height reduces internal pressure, while lowering the height increases it, with pressure also varying by channel geometry. The curved channel shows the maximum pressure at a height of 0.5 m, and the channel with wavy shape exhibits the maximum pressure at 2831.92 MPa, with the curved channel reaching 3384.85 MPa under fixed-wall conditions

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