Theoretical Approach for Shear-Stress Estimation at 2D Equilibrium Scour Holes in Granular Material due to Subvertical Plunging Jets

2020 ◽  
Vol 146 (4) ◽  
pp. 04020009 ◽  
Author(s):  
Michele Palermo ◽  
Stefano Pagliara ◽  
Fabián A. Bombardelli
Keyword(s):  
Shear Stress ◽  
Granular Material ◽  
Theoretical Approach ◽  
Plunging Jets ◽  
Scour Holes ◽  
Stress Estimation

Bed Shear Stress Estimation Under Wave Conditions Using near-bottom Measurements: Comparison of Methods

2018 ◽  
Vol 85 ◽  
pp. 241-245
Author(s):  
Qian Zhang ◽  
Zheng Gong ◽  
Changkuan Zhang ◽  
Jessica R. Lacy ◽  
Bruce E. Jaffe ◽  
...  
Keyword(s):  
Shear Stress ◽  
Bed Shear Stress ◽  
Comparison Of Methods ◽  
Stress Estimation ◽  
Wave Conditions

Shear stress estimation in the linear zone over impermeable and permeable beds in open channels

2014 ◽  
Vol 54 (8) ◽  
pp. 2181-2189 ◽  
Author(s):  
G.I. Pechlivanidis ◽  
E. Keramaris ◽  
I.G. Pechlivanidis ◽  
G.A. Samaras
Keyword(s):  
Shear Stress ◽  
Open Channels ◽  
Stress Estimation

scholarly journals Comparison of Methods for Bed Shear Stress Estimation in Complex Flow Field of Bend

Water ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2753
Author(s):  
Liyuan Zhang ◽  
Faxing Zhang ◽  
Ailing Cai ◽  
Zhaoming Song ◽  
Shilin Tong
Keyword(s):  
Shear Stress ◽  
Flow Field ◽  
Single Point ◽  
Three Dimensional ◽  
Bed Shear Stress ◽  
Complex Flow ◽  
Three Dimensional Flow ◽  
Stress Estimation ◽  
Log Law ◽  
Flow Field Measurement

Bed shear stress is closely related to sediment transport in rivers. Bed shear stress estimation is very difficult, especially for complex flow fields. In this study, complex flow field measurement experiments in a 60° bend with a groyne were performed. The feasibility and reliability of bed shear stress estimations using the log-law method in a complex flow field were analyzed and compared with those associated with the Reynolds, Turbulent Kinetic Energy (TKE), and TKE-w′ methods. The results show that the TKE, Reynolds, and log-law methods produced similar bed shear stress estimates, while the TKE-w′ method produced larger estimates than the other methods. The TKE-w′ method was found to be more suitable for bed shear stress estimation than the TKE method, but the value of its constant C2 needed to be re-estimated. In a complex, strong, three-dimensional flow field, the height of the measurement point (relative or absolute) should be re-estimated when a single point measurement is used to estimate the bed shear stress. The results of this study provide guidance for experimental measurement of bed shear stress in a complex flow field.

Endothelial shear stress estimation in the human carotid artery based on Womersley versus Poiseuille flow

2014 ◽  
Vol 31 (3) ◽  
pp. 585-593 ◽  
Author(s):  
Janina C. V. Schwarz ◽  
Raphaël Duivenvoorden ◽  
Aart J. Nederveen ◽  
Erik S. G. Stroes ◽  
Ed VanBavel
Keyword(s):  
Shear Stress ◽  
Carotid Artery ◽  
Poiseuille Flow ◽  
Stress Estimation ◽  
Endothelial Shear Stress ◽  
Human Carotid

1003 Accuracy improvement of vascular wall shear stress estimation in the method of PC-MR based CFD

2011 ◽  
Vol 2011.24 (0) ◽  
pp. 334-336
Author(s):  
Kohei AOKI ◽  
Yuki ONISHI ◽  
Kenji AMAYA ◽  
Toshiyasu SHIMIZU ◽  
Haruo ISODA ◽  
...  
Keyword(s):  
Shear Stress ◽  
Wall Shear Stress ◽  
Vascular Wall ◽  
Accuracy Improvement ◽  
Stress Estimation ◽  
Wall Shear
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