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International Journal of Fluid Mechanics Research

Erscheint 6 Ausgaben pro Jahr

ISSN Druckformat: 2152-5102

ISSN Online: 2152-5110

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.1 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.3 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.0002 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.33 SJR: 0.256 SNIP: 0.49 CiteScore™:: 2.4 H-Index: 23

Indexed in

Kinematics of Horseshoe Vortex in a Scour Hole around Two Eccentric Triangular Piers

Volumen 41, Ausgabe 4, 2014, pp. 296-317
DOI: 10.1615/InterJFluidMechRes.v41.i4.20
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ABSTRAKT

Flow pattern at single pier has been extensively studied by many investigators, but very little work is available on turbulent flow pattern around piers placed in close proximity. The work explained in this research is concerned with experimental study of the horseshoe vortex flow pattern and characteristics in a local equilibrium scour around a set of two equilateral triangular piers (sides facing the approaching flow) placed in longitudinal direction to the flow with an eccentricity (transverse distance). The eccentricity and longitudinal spacing (spacing along the flow) between two piers were kept constant. Instantaneous three-dimensional velocities were determined by using an acoustic Doppler velocimeter. The contours and distributions of the time-averaged velocity components, turbulence intensities and turbulence kinetic energy are illustrated at different azimuthal planes: 0, 45, −45, 90 and −90°. Velocity vectors presented from time-averaged velocity fields are used to show further flow features. The vorticity and circulation of the horseshoe vortex are computed by using forward difference technique of computational hydrodynamics and Stokes theorem, respectively. The pier arrangement and the interference between the horseshoe vortex of the rear pier and wake vortex of the front pier play a significant role in the creation and formation of the greater scour depth at the eccentric rear piers. Due to the existence of bluff body, the pressure drag becomes much higher than the skin friction drag. This phenomenon was examined during this testing. Vortex strength of the eccentric rear pier was observed always higher in the inline front pier.

REFERENZIERT VON
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