Direct Derivation of Streamwise Velocity from RANS Equation in an Unsteady Nonuniform Open-Channel Flow

被引：2

作者：

Jain, Punit ^{[1
,2
]}

Kundu, Snehasis ^{[3
]}

Ghoshal, Koeli ^{[4
]}

Absi, Rafik ^{[5
]}

机构：

[1] Panipat Inst Engn & Technol, Dept Appl Sci & Humanities, Samalkha 132101, Haryana, India

[2] Pandit Deendayal Energy Univ, Dept Math, Gandhinagar 382007, Gujarat, India

[3] Natl Inst Jamshedpur, Dept Math, Jamshedpur 831014, Jharkhand, India

[4] Indian Inst TechnoI Kharagpur, Dept Math, Kharagpur 721302, India

[5] Ecole Super Ingenieurs Genie Elect Prod & Managem, LR2E Lab Quartz EA 7393, 13 Blvd Hautil, F-95092 Cergy, France

来源：

JOURNAL OF ENGINEERING MECHANICS | 2022年 / 148卷 / 12期

关键词：

Open-channel flow; Reynolds-averaged Navier-Stokes (RANS) equation; Unsteady flow; Velocity distribution; Velocity dip; Partial differential equation; DIP-PHENOMENON; SECONDARY CURRENT; SEDIMENT; SMOOTH; MODEL;

D O I：

10.1061/(ASCE)EM.1943-7889.0002169

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This study investigates the vertical profile of streamwise (longitudinal) velocity in an unsteady and nonuniform open-channel turbulent flow. In contrast to the previous works, a direct derivation for velocity distribution starting from Reynolds-averaged Navier-Stokes (RANS) equation has been shown. Due to unavailability of several expressions for unsteady flow to solve the governing equation, a few assumptions have been made. The proposed model contains the effect of secondary current, which is generally present in all types of open-channel flow. The resulting partial differential equation has been solved numerically. Validation has been done by comparing the model with available experimental data and an existing analytical model. (c) 2022 American Society of Civil Engineers.

引用

页数：6

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