A THREE-DIMENSIONAL VISUALIZATION STUDY OF THE OSCILLATORY FLOW AROUND A WALL-MOUNTED CYLINDER AT KEULEGAN–CARPENTER NUMBER, KC = 20

Document Type

Article

Publication Date

1-1-2023

Abstract

Several flow visualization techniques are applied on the computed hydrodynamic fields for the os-cillatory flow around wall-mounted cylinder with a Keulegan–Carpenter KC = 20. To solve the three-dimensional Navier–Stokes equations, the direct numerical simulation is conducted using Open-source Field Operation and Manipulation (OpenFOAM®). Details obtained from such flow visualizations increase in dimensionality and complexity. Streamlines, contours of dynamic pres-sure over the cylinder surface and wall shear stress in the vicinity of the cylinder-wall junction surface contours, and coherent structures using Q-criterion represent lineal-, areal-, and volume-based flow features, respectively. Line integral convolution as well as particle trajectories are shown at different phases of the background oscillatory flows to illustrate and describe the underlying flow mechanisms.

Publication Source (Journal or Book title)

Journal of Flow Visualization and Image Processing

First Page

55

Last Page

68

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