SPH simulation of free overfall in open channels with even and uneven bottom

Q. Hou, L.X. Zhang, A.S. Tijsseling, A.C.H. Kruisbrink

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Abstract

The free overfall can be used as a simple and accurate device for flow measurement in open channels. In the past, the solution to this problem was found mainly through simplified theoretical expressions or on the basis of experimental data. In this paper, using the meshless smoothed particle hydrodynamics (SPH) method, the free overfall in open channels with even and uneven bottom is investigated. For the even bottom case, subcritical, critical and supercritical flows are simulated. For the uneven bottom case, supercritical flows with different Froude numbers are considered. The free surface profiles are predicted and compared with theoretical and experimental solutions in literature and good agreements are obtained. Keywords: SPH, free overfall, even and uneven bottom, subcritical flow, critical flow, supercritical flow.
Original languageEnglish
Place of PublicationEindhoven
PublisherTechnische Universiteit Eindhoven
Number of pages6
Publication statusPublished - 2013

Publication series

NameCASA-report
Volume1320
ISSN (Print)0926-4507

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