https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 Sensitivity analysis of the second and third-order velocity structure functions to the Reynolds number in decaying and forced isotropic turbulence using the EDQNM model https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39635 Thu 16 Jun 2022 13:38:03 AEST ]]> Consequences of self-preservation on the axis of a turbulent round jet https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17808 −4, where x₀ is a virtual origin, follows immediately from the variation of the mean velocity, the constancy of the local turbulent intensity and the ratio between the axial and transverse velocity variance. Second, the limit at small separations of the two-point budget equation yields an exact relation illustrating the equilibrium between the skewness of the longitudinal velocity derivative S and the destruction coefficient G of enstrophy. By comparing the latter relation with that for homogeneous isotropic decaying turbulence, it is shown that the approach towards the asymptotic state at infinite Reynolds number of S+2G/Rλ in the jet differs from that in purely decaying turbulence, although +2G/Rλ∝R−1λ in each case. This suggests that, at finite Reynolds numbers, the transport equation for ϵ¯ imposes a fundamental constraint on the balance between S and G that depends on the type of large-scale forcing and may thus differ from flow to flow. This questions the conjecture that S and G follow a universal evolution with Rλ; instead, S and G must be tested separately in each flow. The implication for the constant Cϵ2 in the k−ϵ¯ model is also discussed.]]> Sat 24 Mar 2018 07:57:35 AEDT ]]> Reynolds number effect on the velocity derivative flatness factor https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:41296 Mon 01 Aug 2022 12:09:31 AEST ]]> Modelling the transport equation of the scalar structure function https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:50758 Fri 04 Aug 2023 12:16:51 AEST ]]>