Combined Stereoscopic Particle Image Velocimetry and Line Integral Convolution Methods: Application to a Sphere Sedimenting Near a Wall in a Non-Newtonian Fluid

Article type: Research Article

Authors: Lawson, N. J. | Finnis, M. V. | Tatum, J. A. | Harrison, G. M.

Affiliations: School of Engineering, Cranfield University, Cranfield, Bedfordshire MK43 0AL, U.K. E-mail: n.lawson@cranfield.ac.uk | Department of Chemical Engineering, Clemson University, Clemson SC 29634, USA

Abstract: The flow fields for a sphere sedimenting through a Newtonian and two non-Newtonian liquids near a wall in a square tank are investigated using 3-D stereoscopic particle image velocimetry (PIV) and line integral convolution (LIC) methods. The PIV data were taken using an angular stereoscopic configuration with tilt and shift arrangements for the Scheimpflug condition and a pair of liquid correction prisms. Data were recorded from planes perpendicular and parallel to the wall for each fluid case over a range of distances from the wall. The PIV and LIC results highlight significant differences in the wake structure for all three cases. Out of plane flow was also found to persist up to two sphere diameters downstream in the wake for all cases.

Keywords: Visualization, Stereoscopic PIV, LIC, Non-Newtonian

Journal: Journal of Visualization, vol. 8, no. 3, pp. 261-268, 2005