Investigation of Velocity Distribution in Open Channel Flows Based on Conditional Average of Turbulent Structures

We report the development of a new analytical model similar to the Reynolds‐averaged Navier‐Stokes equations to determine the distribution of streamwise velocity by considering the bursting phenomenon. It is found that, in two‐dimensional (2D) flows, the underlying mechanism of the wake law in 2D un...

Full description

Bibliographic Details
Published in:Mathematical Problems in Engineering
Main Authors: Han, Yu, Yang, Shu-Qing, Sivakumar, Muttucumaru, Qiu, Liu-Chao
Other Authors: Zhou, Jian G., National Natural Science Foundation of China, Chinese Universities Scientific Fund
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 2017
Subjects:
DML
Online Access:http://dx.doi.org/10.1155/2017/1458591
http://downloads.hindawi.com/journals/mpe/2017/1458591.pdf
http://downloads.hindawi.com/journals/mpe/2017/1458591.xml
https://onlinelibrary.wiley.com/doi/pdf/10.1155/2017/1458591
Description
Summary:We report the development of a new analytical model similar to the Reynolds‐averaged Navier‐Stokes equations to determine the distribution of streamwise velocity by considering the bursting phenomenon. It is found that, in two‐dimensional (2D) flows, the underlying mechanism of the wake law in 2D uniform flow is actually a result of up/down events. A special experiment was conducted to examine the newly derived analytical model, and good agreement is achieved between the experimental data in the inner region and the model’s prediction. The obtained experimental data were also used to examine the DML‐Law (dip‐modified‐log‐law), MLW‐Law (modified‐log‐wake law), and CML‐Law (Cole’s wake law), and the agreement is not very satisfactory in the outer region.

Similar Items