Modelling Boundary Shear Stress and Depth-Averaged Streamwise Velocity in the Breach

Autor:	Yuxi Ding, Zhenzhen Liu, Tian Li
Rok vydání:	2021
Předmět:	Physics::Fluid Dynamics Stress (mechanics) Hydrogeology Depth averaged Shear stress Boundary (topology) Mechanics Reynolds-averaged Navier–Stokes equations Secondary flow Geology Water Science and Technology Dimensionless quantity
Zdroj:	Water Resources. 48:557-564
ISSN:	1608-344X 0097-8078
DOI:	10.1134/s0097807821040199
Popis:	An analytical model was developed to predict the boundary shear stress and the depth-averaged streamwise velocity in the breach. A more general expression of the depth-integrated form of the streamwise Reynolds averaged Navier-Stokes (RANS) equation was rewritten by considering the secondary flow effects. It accounts for secondary flow effects via the dimensionless secondary flow parameters k1 and k2. The averaged lateral shear stress, the bottom shear stress and the depth-averaged streamwise velocity of the breach was obtained. According to sensitivity analysis of parameters, it is obtained that the secondary flow parameter k2 has a great influence on the averaged lateral shear stress, but few influences on the bottom shear stress and the depth-averaged streamwise velocity. The dimensionless streamwise velocity variation parameter c1 has great influences on the averaged lateral shear stress, bottom shear stress and the depth-averaged streamwise velocity. Comparison of the analytical results with experimental data shows that the proposed model predicts the averaged lateral shear stress and the bottom shear stress well.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ef8b77a83eb7ce09473e68803be99360 https://doi.org/10.1134/s0097807821040199 Zobrazit plný text záznamu Full text from SpringerLink