Abstract
Using two-dimensional Mexican hat wavelets, digitized imagery from the flow visualization pictures of a mixing layer by Brown and Roshko have been analysed. The objective of the present study is to “calibrate” the proposed wavelet technique for educing structures in a flow whose large-scale organization is well established. It is found that, with appropriate thresholds on wavelet-transform coefficients, considerable insight into the structure of the flow at different scales can be obtained. In particular, the analysis reveals that the small-scale structure within the large-scale vortices is approximately homogeneous, and has characteristic scales that do not vary significantly with downstream distance.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Received: 5 March 1998 / Accepted: 28 October 1998
Rights and permissions
About this article
Cite this article
Kailas, S., Narasimha, R. The eduction of structures from flow imagery using wavelets Part I. The mixing layer. Experiments in Fluids 27, 167–174 (1999). https://doi.org/10.1007/s003480050341
Issue Date:
DOI: https://doi.org/10.1007/s003480050341