Parametric and nonparametric regression models in study of the length of hydraulic jump after a multi-segment sharp-crested V-notch weir

Author:

Saadatnejadgharahassanlou Hamid1,Zeynali Rasoul Ilkhanipour2,Vaheddoost Babak3,Gharehbaghi Amin4

Affiliation:

1. Ahar Branch, Civil Engineering Department, Islamic Azad University, Tabriz, East Azerbaijan, Iran

2. Water Engineering Department, Urmia University, Urmia, West Azerbaijan, Iran

3. Faculty of Engineering and Natural Sciences, Department of Civil Engineering, Bursa Technical University, Bursa, Turkey

4. Department of Civil Engineering, Dokuz Eylul University, Tinaztepe Campus, 13 Box 35160, Izmir, Turkey

Abstract

Abstract A multi-segment sharp-crested V-notch weir (SCVW) was used both theoretically and experimentally in this study to evaluate the length of the hydraulic jump at the downstream of the weir. For this aim, a SCVW with three triangular segments at different tail-water depths (tailgate angles), and ten different discharges at a steady flow condition were investigated. Then, the most effective parameters on the length of the hydraulic jump are defined and several parametric and nonparametric regression models, namely multi-linear regression (MLR), additive non-linear regression (ANLR), multiplicative non-linear regression (MNLR), and generalized regression neural network (GRNN) models are compared with two semi-empirical regression models from the literature. The results indicate that the GRNN model is the best model among the selected models. These results are also linked to the nature of the hydraulic jump and the turbulent behavior of the phenomenon, which masks the experimental results with outliers.

Publisher

IWA Publishing

Subject

Water Science and Technology

Reference31 articles.

1. Effect of corrugated beds on characteristics of submerged hydraulic jump;Ain Shams Engineering Journal,2014

2. Evolutionary design of generalized group method of data handling-type neural network for estimating the hydraulic jump roller length;Acta Mechanica,2018

3. Discharge coefficient for sharp-crested side weir in subcritical flow;Journal of Hydraulic Engineering,1999

4. The hydraulic design of stilling basins: hydraulic jumps on a horizontal apron (basin I);Journal of the Hydraulics Division,1957

5. Bubbly flow structure in hydraulic jump;European Journal of Mechanics – B/Fluids,2007

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3