The weak version of universality in turbulence refers to the independence of the scaling exponents of the nth order structure functions from the statistics of the forcing. The strong version includes universality of the coefficients of the structure functions in the isotropic sector, once normalized by the mean energy flux. We demonstrate that shell models of turbulence exhibit strong universal...

Sheared zonal ‡ow helps to reduce the turbulent transport caused by the ion temperature gradient (ITG) mode. Rosenbluth and Hinton (R-H) calculated the residual zonal ‡ow level for radial wavelengths that are much larger than the ion poloidal gyroradius. Their calculation is extended to treat arbitrary radial wavelengths. For the radial wavelengths that approach the ion poloidal gyroradius, but...

In this study, modeling of a fuel jet which has been injected by high pressure into a low-pressure tank are investigated. Due to the initial conditions and the geometry of this case and similar cases (like CNG injectors in internal combustion engines (ICE)), the barrel shocks and Mach disk are observed. Hence a turbulence and transient flow will be expected with lots of shocks and waves. Accord...

A recent study by Angel (1994) using simplified analytical models indicated the feasibility of imaging extrasolar planets from the ground, making use of adaptive optics correction of a large telescope. We have performed detailed simulations of the method using computer codes that model propagation through atmospheric turbulence, adaptive correction, and broadband imaging. We confirm that high-r...

Mick Marchington's contributions to employee voice, participation, and involvement are broad deep. This scholarship is consistently distinguished by a rejection of ‘one-size-fits-all’ approaches in favour complex, multi-layered understandings. We reflect on some key involvement, with an emphasis the importance internal actors who conditioned diverse external influences. also illustrate lasting ...

Although wake vortices are known to decay more rapidly near the ground than away from the ground, the details of the ground interaction are not well understood. Propeller anemometer arrays located under the approach path have been used to study vortex transport and provide some information about the vortex interaction with the ground, such as the generation of secondary vortices via boundary-la...

Direct numerical simulations (DNS) are conducted of flow through a linear low-pressure turbine cascade with T106 blade sections at Re=60,000, based on chord and isentropic exit velocity. A highly efficient in-house compressible Navier-Stokes solver was adapted for turbine cascade simulations and applied to investigate the effect of inflow disturbances on transition behaviour and blade profile l...