Affiliations: Institute of Industrial Science, University of Tokyo,
Roppongi, Minato-ku, Tokyo 106-8558 , Japan. | Nuclear Engineering Research Laboratory, University of
Tokyo, Tokai-mura, Ibaraki 319-1106, Japan.
Abstract: Effects of various parameters for PIV image acquiring and processing
on the final velocity field is studied by using PIV standard images (Okamoto et
al., 1997) to evaluate the cross correlation method. The studied parameters
include the size of interrogation window, the size of search window, the number
of tracer particles, the diameter of tracer particles, out-of-plane velocity
and average image velocity or the time interval between two images. In order to
improve the PIV sub-pixel accuracy, the validity of the "sub-pixel
interpolation" process also is discussed in the paper. Some useful conclusions
are suggested for the optimal parameter selection for a final PIV result with
high accuracy.