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journal article·2023-06-01Open access

Numerical simulation of transient pipe flow with entrapped air and wet bed effects

Chunling Wang, Tibing Xu, Yin Wang, Jiajia Li, Chenhui Zhang

AIP Advances· Volume 13· Issue 6
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Source abstract

Abstract

In this study, the evolution of transient pipe flow along the wet bed is numerically investigated. In the investigation, the shear stress transport k-ω model is used and the volume of fluid method is employed to track the surface of air and water. Two key parameters in the flow as upstream head H and initial water depth h in the pipe are examined. It is found that the bottom stress is significantly affected by the two parameters. The upstream head H determines the magnitude of the shear force, and the downstream water depth in the pipe affects the stability of the shear force. The boundary layer separation and flow pattern are the essential causes of shear instability. By analyzing the simulation results, an empirical equation with the average flow velocity is obtained to estimate the overflow capacity of the pipe by just the upstream water level and the depth of the wet bed.
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Research context

OpenAlex topics: Water Systems and Optimization · Lattice Boltzmann Simulation Studies · Fluid Dynamics and Turbulent Flows

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Civil Engineering and Architecture, Taizhou University 1 , Taizhou 318000, Zhejiang, China

School of Civil and Environmental Engineering, Ningbo University 2 , Ningbo 315211, Zhejiang, China

Institute of Disaster Prevention and Mitigation and Water Engineering Safety, Jiangxi Academy of Water Science and Engineering 3 , Nanchang 330029, Jiangxi, China

School of Hydraulic and Ecological Engineering, Nanchang Institute of Technology 4 , Nanchang 330099, Jiangxi, China

Funding

National Nature Science Foundation of China · China Postdoctoral Science Foundation Funded Project · Zhejiang Provincial Nature Science Foundation of China · Taizhou Science and Technology Bureau Projects

References (24)

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