A numerical model for air concentration distribution in self-aerated open channel flows

2015 ◽  
Vol 27 (3) ◽  
pp. 394-402 ◽  
Author(s):  
Wang-ru Wei ◽  
Jun Deng ◽  
Fa-xing Zhang ◽  
Zhong Tian
Keyword(s):  
Numerical Model ◽  
Concentration Distribution ◽  
Open Channel ◽  
Channel Flows ◽  
Air Concentration ◽  
Open Channel Flows

scholarly journals Non-Hydrostatic Transitional Open-Channel Flows from a Supercritical to a Subcritical State

2021 ◽  
Vol 29 (2) ◽  
pp. 39-48
Author(s):  
Yebegaeshet T. Zerihun
Keyword(s):  
Numerical Model ◽  
Turbulent Flow ◽  
Open Channel ◽  
Air Entrainment ◽  
Channel Flows ◽  
Water Model ◽  
Subcritical State ◽  
Mean Flow ◽  
Open Channel Flows ◽  
Flow Problems

Abstract In this study, a depth-averaged numerical model was employed to investigate the two-dimensional flow features of transitional open-channel flows from a supercritical to a subcritical state. Compared to a shallow-water model, the proposed model incorporates supplementary terms to account for the effects of non-uniform velocity and non-hydrostatic pressure distributions. The model equation was solved numerically by means of the Adams–Bashforth–Moulton scheme. A wide variety of transitional open-channel flow problems such as hydraulic jumps was considered for assessing the suitability of the numerical model. The results of the model for the free-surface profile, pressure distribution, and characteristics of the first wave of an undular jump were compared with the experimental data, and the agreement was found to be satisfactory. Despite the effects of the three-dimensional characteristics of the flow and the bulking of the flow caused by air entrainment, the model performed reasonably well with respect to the simulations of the mean flow characteristics of the curvilinear turbulent flow problems. Furthermore, the results of this investigation confirmed that the model is more suitable for analyzing near-critical turbulent flow problems without cross-channel shock waves.

scholarly journals An experimental study on open channel flows with moderate adverse pressure gradients

1995 ◽  
Vol 39 ◽  
pp. 391-396
Author(s):  
Kouki ONITSUKA ◽  
Masaru URA ◽  
Juichiro AKIYAMA ◽  
Sadakatsu MATSUOKA
Keyword(s):  
Experimental Study ◽  
Open Channel ◽  
Channel Flows ◽  
Pressure Gradients ◽  
Open Channel Flows
Sign in / Sign up

Export Citation Format

Share Document