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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/17802
Title: An experimental study on flow past an equilateral triangular prism at intermediate reynolds number and the effect of its orientation
Authors: Agrawal N.
Dutta S.
Gandhi B.K.
Published in: Proceedings of American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM
Abstract: This paper explores the effect of two orientations (0° and 180°) on near wake region of an equilateral triangular prism at intermediate Reynolds number. The paper also investigates the effect of Reynolds number on the near wake region at intermediate regime. Two orientations are defined such that the apex of the equilateral triangle is pointing upstream and downstream respectively. The flow field behind a triangular prism is different in these two orientations. When apex angle points upstream it corresponds to a fore-body attached to a flat plate while when apex angle points downstream the flat face acts like a flat plate with an after body attached to it. This afterbody penetrates the recirculation zone formed behind the flat plate. These two effects are investigated for various Reynolds numbers in intermediate regime. Factors affecting drag coefficient and Strouhal number are different in both cases. In first case the fore-body changes the flow before it gets separated in two free shear layers. In other words, the fore-body affects the free shear layers formed and hence the drag. In the second case, the two shear layers are formed first then their interaction is modified by the after-body in the near wake region behind the prism. Particle Image Velocimetry (PIV) and Hotwire anemometry is being used in present study. Detailed flow field is investigated in terms of velocity magnitude, stream traces, vorticity contours, centerline recovery, power spectra, velocity profiles, Strouhal number and drag coefficient. Copyright © 2013 by ASME.
Citation: Proceedings of American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM, (2013). Incline Village, NV
URI: https://doi.org/10.1115/FEDSM2013-16474
http://repository.iitr.ac.in/handle/123456789/17802
Issue Date: 2013
Keywords: Equilateral triangles
Hot-wire anemometry
Intermediate regimes
Intermediate Reynolds number
Particle image velocimetries
Recirculation zones
Velocity profiles
Vorticity contour
Drag coefficient
Flow fields
Industrial applications
Machinery
Prisms
Shear flow
Strouhal number
Reynolds number
ISBN: 9.78E+12
ISSN: 8888116
Author Scopus IDs: 16229756900
55257172900
7006087147
Author Affiliations: Agrawal, N., Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee, Uttarakhand, India
Dutta, S., Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee, Uttarakhand, India
Gandhi, B.K., Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee, Uttarakhand, India
Corresponding Author: Department of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee, Uttarakhand, India
Appears in Collections:Conference Publications [ME]

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