On image pre-processing for PIV of sinlge- and two-phase flows over reflecting objects

N.G. Deen, P. Willems, M. van Sint Annaland, J.A.M. Kuipers, Rob G.H. Lammertink, Antonius J.B. Kemperman, Matthias Wessling, Walterus Gijsbertus Joseph van der Meer

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Abstract

A novel image pre-processing scheme for PIV of single- and two-phase flows over reflecting objects which does not require the use of additional hardware is discussed. The approach for single-phase flow consists of image normalization and intensity stretching followed by background subtraction. For two-phase flow, an additional masking step is added after the background subtraction. The effectiveness of the pre-processing scheme is shown for two examples: PIV of single-phase flow in spacer-filled channels and two-phase flow in these channels. The pre-processing scheme increased the displacement peak detectability significantly and produced high quality vector fields, without the use of additional hardware.
Original languageUndefined
Pages (from-to)525-530
JournalExperiments in fluids
Volume49
Issue number2
DOIs
Publication statusPublished - 2010

Keywords

  • METIS-266270
  • IR-70910

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