K-1827 PIV Measurement of a Turbulence Dissipation-Rate in a Free Jet

Abstract

The instantaneous velocity distributions in a free jet are measured using cross-correlation of high-resolution particle images, which contributes to evaluate the production- and dissipation-rates of turbulence kinetic energy. The obtained velocity vectors show that eddies having various sizes interact with each other. Also, the turbulence structure in a jet is discussed based on the balance of turbulence energy.