Space-Time Correlations and Dynamic Coupling in Turbulent Flows
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[1] Chinese Academy of Sciences
Chinese Academy of Sciences
China
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- Localización: Annual review of fluid mechanics, ISSN 0066-4189, Nº. 49, 2017, págs. 51-70
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
Space-time correlation is a staple method for investigating the dynamic coupling of spatial and temporal scales of motion in turbulent flows. In this article, we review the space-time correlation models in both the Eulerian and Lagrangian frames of reference, which include the random sweeping and local straining models for isotropic and homogeneous turbulence, Taylor's frozen-flow model and the elliptic approximation model for turbulent shear flows, and the linear-wave propagation model and swept-wave model for compressible turbulence. We then focus on how space-time correlations are used to develop time-accurate turbulence models for the large-eddy simulation of turbulence-generated noise and particle-laden turbulence. We briefly discuss their applications to two-point closures for Kolmogorov's universal scaling of energy spectra and to the reconstruction of space-time energy spectra from a subset of spatial and temporal signals in experimental measurements. Finally, we summarize the current understanding of space-time correlations and conclude with future issues for the field.
