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A generalized linear stability analysis is applied to the case of a thin liquid film propelled to spread by a continuous supply of surfactant. The time-dependent base states for the film thickness and surfactant concentration give rise to a nonautonomous system describing disturbance propagation....
The relationship between turbulent viscosity and turbulence anisotropy is investigated on the basis of a statistical theory of inhomogeneous turbulence. An anisotropic turbulent viscosity is derived with the axisymmetric anisotropy subject to an enhanced streamwise turbulence intensity taken into...
A flat plate boundary layer disturbance in the form of a streak is excited by a vortex of limited spanwise extent generated upstream of the plate leading edge. Frequency-wave spectral analysis of the streamwise velocity component of the streak is performed. The most part of energy in the spectrum...
This paper considers the effect of applying nonzero velocity fluctuations along a flat smooth wall, mainly with the aim of understanding how conditions at the wall interact with the outer turbulent flow. Such a study is expected to be of use in formulating effective strategies for wall turbulence...
In this paper we present a new dynamic methodology to compute the value of the numerical coefficient present in numbers of subgrid models, by mean of a multilevel approach. It is based on the assumption of a power law for the spectral density of kinetic energy in the range of the highest resolved...