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Abstract
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The flow field around a T-shaped spur dike located in a 90°
bend is investigated experimentally. The three-dimensional
Acoustic Doppler Velocimeter (ADV) was used for measuring
the flow field. The comparison of the three dimensional components
of velocity was made in different sections of the bend and
the differences of the flow pattern along the bend was analyzed.
The observations showed the significant effect of the spur dike
on the secondary flow patterns. Some horizontal vortices with a
counter-clock-wise direction were also observed in the up and
down stream of the spur dike near the outer bank of the bend.
In addition, the vortices and reverse flows in the up and down
stream of the spur dike, the changes of the secondary flow and
vorticity are also addressed in this study.
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