Dependence of the asymptotic energy dissipation on third-order velocity scaling

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Department of Physics; Department of Mechanical Engineering-Engineering Mechanics


The asymptotic energy dissipation is connected to the third-order scaling of the longitudinal velocity increment magnitude in three-dimensional turbulence via the Kolmogorov 4/5 law. It is shown that the third-order longitudinal absolute velocity increment scaling should not exceed unity for anomalous dissipation to occur, that is for nonvanishing average dissipation in the inviscid limit - also known as the "zeroth law" of turbulence. Conversely, if the third-order longitudinal absolute velocity increment scaling exceeds unity, then the average dissipation must asymptotically vanish and the velocity increment field will becomes symmetric at least at the level of its skewness. This Letter highlights the importance of the third-order absolute velocity increment scaling in assessing the status of the zeroth law of turbulence.

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Physical Review Fluids