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

被引：2

作者：

Wang, Chunling ^{[1
]}

Xu, Tibing ^{[2
]}

Wang, Yin ^{[3
,4
]}

Li, Jiajia ^{[1
]}

Zhang, Chenhui ^{[4
]}

机构：

[1] Taizhou Univ, Sch Civil Engn & Architecture, Taizhou 318000, Zhejiang, Peoples R China

[2] Ningbo Univ, Sch Civil & Environm Engn, Ningbo 315211, Zhejiang, Peoples R China

[3] Jiangxi Acad Water Sci & Engn, Inst Disaster Prevent & Mitigat & Water Engn Safet, Nanchang 330029, Jiangxi, Peoples R China

[4] Nanchang Inst Technol, Sch Hydraul & Ecol Engn, Nanchang 330099, Jiangxi, Peoples R China

来源：

AIP ADVANCES | 2023年 / 13卷 / 06期

基金：

中国博士后科学基金;

关键词：

KELVIN-HELMHOLTZ INSTABILITY; LEVEL-SET METHODS;

D O I：

10.1063/5.0147511

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this study, the evolution of transient pipe flow along the wet bed is numerically investigated. In the investigation, the shear stress transport k-omega 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. (c) 2023 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

引用

页数：11