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.
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Nicholas J. Lawson: He received his Ph.D. in Mechanical engineering in 1995 from Loughborough University. After completing a post-doctoral assignment at the University of Melbourne, he joined the Department of Aerospace, Power and Sensors at Cranfield University in 1999 as a Lecturer before moving to the Department of Aerospace Sciences as a Senior lecturer in 2003. His research interests are the application and development of particle image velocimetry (PIV) and laser Doppler anemometry LDA techniques.
Mark V. Finnis: He received his Ph.D. in 1993 from Cranfield Institute of Technology. He works in the Department of Aerospace, Power and Sensors at the Royal Military College of Science, Cranfield University. His research interests are boundary-layer stability, wind-tunnel technology and external ballistics. He also has experience of wind tunnel flow measurement using PIV and LDA techniques.
Jared A. Tatum: He is a Ph.D. Candidate in the department of Chemical Engineering at Clemson University in Clemson South Carolina. Mr. Tatum received a BS with a double major in Chemical Engineering and Chemistry from Rose-Hulman Institute of Technology before beginning his Ph.D. candidacy. His research interests include: rheology of complex fluids, extensional properties of complex fluids, and optical techniques for complex fluid.
Graham M. Harrison: He received his Ph.D. in Chemical Engineering in 1997 from the University of California, Santa Barbara. After completing a post-doctoral assignment at the University of Melbourne, he joined the Dept. of Chemical Engineering at Clemson University in 1999 as an assistant professor. His research interests are Extensional Flow Properties and Optical Techniques for Non-Newtonian fluid mechanics.
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Lawson, N.J., Finnis, M.V., Tatum, J.A. et al. Combined stereoscopic particle image velocimetry and line integral convolution methods. J Vis 8, 261–268 (2005). https://doi.org/10.1007/BF03181504
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DOI: https://doi.org/10.1007/BF03181504