Fluid dynamics turbulence refers to the chaotic and unpredictable dynamics of flows. Despite the fact that the equations governing the motion of fluids are known since more than …
The problem of anisotropy and its effects on the statistical theory of high Reynolds number (Re) turbulence (and turbulent transport) is intimately related and intermingled with the …
A shear-improved Smagorinsky model is introduced based on results concerning mean- shear effects in wall-bounded turbulence. The Smagorinsky eddy-viscosity is modified as …
N Marati, CM Casciola, R Piva - Journal of Fluid Mechanics, 2004 - cambridge.org
Real turbulent flows are difficult to classify as either spatially homogeneous or isotropic. Nonetheless these idealizations allow the identification of certain universal features …
The statistical properties of wall turbulence in the logarithmic region are investigated using structure functions of the streamwise velocity. To this end, datasets that span several orders …
The effects of different filtering strategies on the statistical properties of the resolved-to- subfilter scale (SFS) energy transfer are analysed in forced homogeneous and isotropic …
A method to simulate the effects of a roughened surface on a turbulent boundary layer is introduced. The method is easy to implement, does not increase the numerical overhead of …
The turbulent flow originating from the interaction between two parallel streams with different velocities is studied by means of direct numerical simulation. Rather than the more common …
Turbulent shear flows, such as those occurring in the wall region of turbulent boundary layers, show a substantial increase of intermittency in comparison with isotropic conditions …