Multiscaling properties on sequences of turbulent plumes images

López, Pilar Sánchez; Tarquis, Ana M.; Matulka, Ania; Skadden, Benjamín; Redondo, J. M.

doi:10.1016/j.chaos.2017.10.011

Cited by 7 publications

(2 citation statements)

References 43 publications

(50 reference statements)

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“…Flohr & Olivari (1994) analysed the passive scalar field of a turbulent jet and found a multifractal spectrum. López et al (2017) performed a similar analysis on a turbulent plume and found that its spatiotemporal evolution can be described by multifractal metrics such as the width and symmetry of the singularity spectrum. Viggiano et al (2021) examined the dynamics of a variable-density jet in the laminar, transitional and turbulent regimes.…”

Section: Multifractality In Flow Systemsmentioning

confidence: 99%

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Multifractality and scale-free network topology in a noise-perturbed laminar jet

Guan,

Zhu,

Yang

et al. 2023

J. Fluid Mech.

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We present experimental evidence of multifractality and scale-free network topology in a noise-perturbed laminar jet operated in a globally stable regime, prior to the critical point of a supercritical Hopf bifurcation and prior to the saddle-node point of a subcritical Hopf bifurcation. For both types of bifurcation, we find that (i) the degree of multifractality peaks at intermediate noise intensities, (ii) the conditions for peak multifractality produce a complex network whose node degree distribution obeys an inverse power-law scaling with an exponent of $2 < \gamma < 3$ , indicating scale-free topology and (iii) the Hurst exponent and the global clustering coefficient can serve as early warning indicators of global instability under specific operating and forcing conditions. By characterising the noise-induced dynamics of a canonical shear flow, we demonstrate that the multifractal and scale-free network dynamics commonly observed in turbulent flows can also be observed in laminar flows under certain stochastic forcing conditions.

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Section: Multifractality In Flow Systemsmentioning

confidence: 99%

“…López et al. (2017) performed a similar analysis on a turbulent plume and found that its spatiotemporal evolution can be described by multifractal metrics such as the width and symmetry of the singularity spectrum. Viggiano et al.…”

Section: Introductionmentioning

confidence: 99%