Flow Pattern in a Bend Channel with Attractive and Repelling T-Shaped Spur Dike Using SSIIM Model

Document Type : Original Article

Authors

1 M.Sc. of Hydraulic Structures, Department of Civil Engineering, Persian Gulf University., Bushehr., Iran

2 Associate Professor of Hydraulic Structures, Department of Civil Engineering, Persian Gulf University., Bushehr., Iran

Abstract

This paper studied flow pattern in attractive and repelling modes of a spur dike (30 degree angle to the flow) by changing the submergence percentage of the spur (0, 15 and 25% of depth at the channel entrance). The simulation was made by SSIIM modeling. In this study, streamlines, secondary flow strength and flow separation and reattachment zones were addressed. The numerical results were compared with experimental data and the comparison showed that the numerical results were in a relatively good agreement with the experimental data. The results indicated that by increasing the submergence percentage, the amount of jumps in secondary flow strength decreased in repelling mode and increased in attractive mode. Moreover, the streamlines at the upstream of the repelling spur dike were more deflected than in the case of the attractive spur dike.

Keywords

References

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Iranian Journal of Irrigation & Drainage
Volume 9, Issue 5 - Serial Number 53
November and December 2015
Pages 773-783

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