Journal article

Characteristics of the turbulent non-turbulent interface in a spatially evolving turbulent mixing layer

G Balamurugan, A Rodda, J Philip, AC Mandal

Journal of Fluid Mechanics | Cambridge University Press | Published : 2020

Abstract

The highly convoluted interface separating the turbulent and non-turbulent regions in a turbulent mixing layer is experimentally investigated using the particle image velocimetry (PIV) technique. The mixing layer was generated using a fine screen/mesh in one half of the test section of a low-speed wind tunnel. The PIV data, which were acquired with high spatial resolution in the self-similar regime of the flow, allow us to identify the turbulent/non-turbulent interface (TNTI) using a suitable threshold value of the absolute spanwise vorticity, |ωz|. The threshold values for the top and bottom interfaces of the mixing layer are found to be different, and the probability density function (PDF)..

View full abstract

University of Melbourne Researchers

Citation metrics