Source of acceleration intermittency in isotropic turbulence
Strong acceleration intermittency in fluid turbulence is interpreted in the context of different supports for local enstrophy and dissipation by introducing a new decomposition of acceleration. This paper proposes a simple Lamb Vortex Model that captures statistical features of acceleration, such as probability density functions, flatness factors, and correlation coefficients, observed in the direct numerical simulation of homogeneous isotropic turbulence.
KeywordsAcceleration intermittency Direct numerical simulation Lamb vortex model
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