scholarly journals Seasonal particle responses to near‐bed shear stress in a shallow, wave‐ and current‐driven environment

2021 ◽  
Author(s):  
Grace Chang ◽  
Galen Egan ◽  
Joseph D. McNeil ◽  
Samuel McWilliams ◽  
Craig Jones ◽  
...  
Keyword(s):  
Shear Stress ◽  
Bed Shear Stress

Efficiency prediction for storage chambers using computational fluid dynamics

1996 ◽  
Vol 33 (9) ◽  
pp. 163-170 ◽  
Author(s):  
Virginia R. Stovin ◽  
Adrian J. Saul
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Shear Stress ◽  
Particle Tracking ◽  
Critical Value ◽  
Complex Geometries ◽  
Bed Shear Stress ◽  
Breadth Ratio ◽  
Computational Fluid Dynamics Cfd ◽  
Simulated Flow

Research was undertaken in order to identify possible methodologies for the prediction of sedimentation in storage chambers based on computational fluid dynamics (CFD). The Fluent CFD software was used to establish a numerical model of the flow field, on which further analysis was undertaken. Sedimentation was estimated from the simulated flow fields by two different methods. The first approach used the simulation to predict the bed shear stress distribution, with deposition being assumed for areas where the bed shear stress fell below a critical value (τcd). The value of τcd had previously been determined in the laboratory. Efficiency was then calculated as a function of the proportion of the chamber bed for which deposition had been predicted. The second method used the particle tracking facility in Fluent and efficiency was calculated from the proportion of particles that remained within the chamber. The results from the two techniques for efficiency are compared to data collected in a laboratory chamber. Three further simulations were then undertaken in order to investigate the influence of length to breadth ratio on chamber performance. The methodology presented here could be applied to complex geometries and full scale installations.

scholarly journals Particle Responses to Near-Bed Shear Stress in a Shallow, Wave- and Current-Driven Environment

2021 ◽  
Author(s):  
Grace Chang ◽  
Galen Egan ◽  
Joseph D McNeil ◽  
Samuel McWilliams ◽  
Craig Jones ◽  
...  
Keyword(s):  
Shear Stress ◽  
Bed Shear Stress

scholarly journals Study on bed shear stress around channel constriction.

1985 ◽  
pp. 115-121
Author(s):  
Susumu HASHIMOTO ◽  
Yoshitaka FUKUI ◽  
Hideo KIKKAWA
Keyword(s):  
Shear Stress ◽  
Bed Shear Stress ◽  
Channel Constriction

The influence of deposit body on the near-bed shear stress

2021 ◽  
pp. 1-29
Author(s):  
Yan He ◽  
Jing Zhang ◽  
Huling Jiang ◽  
Zhixue Guo ◽  
Hongxi Zhao
Keyword(s):  
Shear Stress ◽  
Bed Shear Stress

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

Numerical study of ship induced bed shear stress

2020 ◽  
pp. 2338-2342
Author(s):  
Malasani Gopichand ◽  
Tapas Kumar Pradhan ◽  
K Murali ◽  
Venu Chandra
Keyword(s):  
Shear Stress ◽  
Numerical Study ◽  
Bed Shear Stress

scholarly journals Turbulence Characteristic of Flow Near Laboratory Experiment Groin Fields

2019 ◽  
Vol 24 (2) ◽  
pp. 167
Author(s):  
Pradipta Nandi Wardhana
Keyword(s):  
Shear Stress ◽  
Laboratory Experiment ◽  
Reynolds Stress ◽  
Flow Region ◽  
Turbulence Characteristic ◽  
Bed Shear Stress ◽  
Primary Flow ◽  
Flow Area ◽  
Number Range ◽  
Downstream Area

Groin is hydraulic structure utilized to protect riverbank from erosion. Groin will shift away flow. Area just downstream of groin structure will be occupied by low velocity flow hence there will be sediment deposition. Turbulence mechanism between primary flow region and groin field having important role in sediment exchange needs to be investigated. Instantaneous flow measurement was conducted in order to investigate turbulence relation between series groin under various groin spacing. Laboratory experiment employed turbulence flow having Reynolds number range between 31,935-32,500 and Froude number range between 0.051-0.053. A MicroADV 16-MHz was used to measure 3D instantaneous velocity. The experiment findings expressed that Reynolds stress involving vertical velocity  and    did not show any specific distributions except at the lowest measurement elevation, while Reynolds stress    showed specific distributions. Turbulence value difference between groin field and primary flow region at upstream of the groin field was significant. As the area was getting downstream, area containing high turbulence was wider. This work indicated that bed shear stress value  tended to grow at downstream area of groin field. High difference bed shear stress value  between primary flow region and groin field seized second groin field and third groin field.

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