Acceso al sitio web del Consejo de Políticas de Infraestructura
REVISTA
Water

   
Redirigiendo al acceso original de articulo en 22 segundos...
Inicio  /  Water  /  Vol: 15 Par: 7 (2023)  /  Artículo
ARTÍCULO
TITULO

Characteristics of Very Large-Scale Motions in Rough-Bed Open-Channel Flows

Ying Shen    
Shengfa Yang and Jie Liu    

Resumen

Rough-bed open-channel flows (OCFs) are ubiquitous in rivers and canals. However, the scaling and energy contents of very-large-scale motions (VLSMs) in such flows remain unclear. In this study, the above characteristics of VLSMs are experimentally investigated with the measurement of particle imaging velocimetry (PIV). VLSM wavelengths obtained via premultiplied spectra analysis were consistent with previously reported values. Comparisons with these studies ruled out the role of relative submergence, and suggested that the channel aspect ratio is key to controlling the VLSM wavelengths in OCFs. VLSMs carry approximately 60% of the turbulence kinetic energy (TKE) and 38?50% of the Reynolds stress in rough-bed OCFs. The VLSM-related TKE fraction in the 0.1?0.5H range increased with increasing friction Reynolds number, while variation in the Reynolds shear stress did not exhibit any explicit trend.

PÁGINAS
pp. 0 - 0

 Artículos similares

       
 
Hui-Chieh Chuang, Dong-Jiing Doong, Chung-Ru Ho and Ya-Hui Ho    
Ocean recreational activities (ORAs), including swimming, surfing, diving, paddleboarding, etc., in global marine areas are becoming increasingly popular. However, there are potential risks in coastal ocean environments. This study aims to establish a fr... ver más

 
Guadalupe Díaz-Gutiérrez, Luis Walter Daesslé, Francisco José Del-Toro-Guerrero, Mariana Villada-Canela and Georges Seingier    
Groundwater pollution is one of the main challenges in our society, especially in semi-arid Mediterranean regions. This issue becomes especially critical in predominantly agricultural areas that lack comprehensive knowledge about the characteristics and ... ver más
Revista: Hydrology

 
Jozef Gocál, Josef Vican, Jaroslav Odrobinák, Richard Hlinka, Franti?ek Bahleda and Agnieszka Wdowiak-Postulak    
In addition to traditional building materials, such as steel and concrete, wood has been gaining increasing prominence in recent years. In the past, the use of wood was limited due to its susceptibility to damage by fungi, insects, and temperature. These... ver más
Revista: Applied Sciences

 
Ruiqian Wang, Dan Yao, Jie Zhang, Xinbiao Xiao and Ziyan Xu    
The body of a high-speed train is a composite structure composed of different materials and structures. This makes the design of a noise-reduction scheme for a car body very complex. Therefore, it is important to clarify the key factors influencing sound... ver más
Revista: Acoustics

 
Ping-Chang Tsai, Yu-Min Hsueh, Chang-Kuo Chen and Cheng-Chien Kuo    
Partial discharge (PD) characteristics are very important for the diagnosis of damaged transformation equipment. If the power transmission and transformation equipment fails, it will cause large economic losses, and thus prevention is better than treatme... ver más
Revista: Applied Sciences