Long-term temporal dependence of droplets transiting through a fixed spatial point in gas-liquid twophase turbulent jets

Abstract

We perform rescaled range analysis upon the signals measured by Dual Particle Dynamical Analyzer in gas-liquid two-phase turbulent jets. A novel rescaled range analysis is proposed to investigate these unevenly sampled signals. The Hurst exponents of velocity and other passive scalars in the bulk of spray are obtained to be 0.59$\pm$0.02 and the fractal dimension is hence 1.41$\pm$ 0.02, which are in remarkable agreement with and much more precise than previous results. These scaling exponents are found to be independent of the configuration and dimensions of the nozzle and the fluid flows. Therefore, such type of systems form a universality class with invariant scaling properties.

16 Elsart pages including 8 eps figures

References in corpus (2)

• Evidence of Intermittent Cascades from Discrete Hierarchical Dissipation in Turbulence
• New Evidence of Discrete Scale Invariance in the Energy Dissipation of Three-Dimensional Turbulence: Correlation Approach and Direct Spectral Detection

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