Examination of Blockage Effects on the Progression of Local Scour around a Circular Cylinder

Priscilla Williams; Ram Balachandar; Tirupati Bolisetti

doi:10.3390/w11122631

Back

Examination of Blockage Effects on the Progression of Local Scour around a Circular Cylinder

Journal article

Open access

Peer reviewed

Examination of Blockage Effects on the Progression of Local Scour around a Circular Cylinder

Priscilla Williams, Ram Balachandar and Tirupati Bolisetti

Water (Basel), Vol.11(12), p.2631

12/13/2019

DOI: 10.3390/w11122631

Files and links (1)

url

https://doi.org/10.3390/w11122631View

Published (Version of record) Open Access

Abstract

An evaluation of scour estimation methods has indicated that the effects of blockage ratio are neglected in both scour modelling and development of new predictive methods. The role of channel blockage on the mechanism and progression of local scour is not well understood, and further analysis is required in order to incorporate this effect into scour estimation. In the present investigation, local scour experiments were carried out under varying blockage ratio. The results were compared with data from literature in order to explore the effects of blockage ratio (D/b, where D is the pier diameter, and b is the channel width) on equilibrium scour depth (d(se)/D, where d(se) is the depth of scour at equilibrium). It was determined that D/b had a small influence on both d(se)/D and the progression of scour depth (d(s)/D) when relative coarseness D/d(50) < 100 (where d(50) is the median diameter of sediment), and that the influence appeared to be amplified when D/d(50) > 100. The efficacy of scour estimation methods used to predict the progression of local scour was also dependent on D/d(50). A method of scour estimation used to predict d(se)/D was evaluated, and it was similarly found to be particularly effective when D/d(50) < 100. In future work, further experiments and analysis in the range of D/d(50) > 100 are required in order to establish the role of D/b under prototype conditions and to refine existing scour estimation methods.

Environmental Sciences

Environmental Sciences & Ecology

Life Sciences & Biomedicine

Physical Sciences

Science & Technology

Water Resources

Details

Title: Subtitle: Examination of Blockage Effects on the Progression of Local Scour around a Circular Cylinder
Creators: Priscilla Williams - University of Windsor
Ram Balachandar - University of Windsor
Tirupati Bolisetti - University of Windsor
Resource Type: Journal article
Publication Details: Water (Basel), Vol.11(12), p.2631
DOI: 10.3390/w11122631
ISSN: 2073-4441
eISSN: 2073-4441
Publisher: Mdpi
Number of pages: 15
Grant note: Natural Sciences and Engineering Research Council of Canada; Natural Sciences and Engineering Research Council of Canada (NSERC); CGIAR
Language: English
Date published: 12/13/2019
Academic Unit: Civil and Environmental Engineering
Record Identifier: 9984446432802771

Metrics

8 Record Views

13 Times Cited - Web of Science