Three-Dimensional Study of the Effect of Block Roughness Geometry on Inclined Drop

Document Type : Research

Authors

1 Professor, Department of Civil Engineering, Faculty of Engineering, University of Maragheh, Maragheh, Iran.

2 M.sc Student, Department of Civil Engineering, University of Maragheh, Maragheh, East Azarbaijan, Iran.

3 Assistant Professor, Faculty of Engineering, Niccolò Cusano University, Rome, Italy.

4 Professor, School of Engineering, University of St. Thomas, St Paul, MN, USA.

Abstract

The main purpose of this study is to provide a method to increase energy dissipation on an inclined drop. Therefore, three types of rough elements with cylindrical, triangular and bat-shaped geometries are used on the inclined slope in the relative critical depth range of 0.128 to 0.36 and the effect of the geometry of these elements is examined using Flow 3D software. The results showed demonstrate that the downstream relative depth obtained from the numerical analysis is in good agreement with the laboratory results. The application of rough elements on the inclined drop increased the downstream relative depth and also the relative energy dissipation. The application of rough elements on the sloping surface of the drop significantly reduced the downstream Froude number, so that the Froude number in all models ranging from 4.7~7.5 to 1.45~3.36 also decreased compared to the plain drop. Bat-shaped elements are structurally smaller in size, so the use of these elements, in addition to dissipating more energy, is also economically viable.

Keywords

References

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Numerical Methods in Civil Engineering
Volume 6, Issue 1
September 2021
Pages 1-9

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History

  • Receive Date: 04 May 2021
  • Revise Date: 29 June 2021
  • Accept Date: 12 July 2021

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