It is known that low-frequency components of three-dimensional vortical disturbances in the free stream can be entrained into the boundary layer due to the nonparallel flow effect, producing significant distortion in the form of alternate thickening and thinning of the layer in the spanwise direction. This observation goes back to Dryden (1936) and Taylor (1939) who, in fact, suggested that the...

We consider the notion of zilch current that was recently discussed in literature as an alternative helicity measure for photons. Developing this idea, we suggest generalization systems fermions. start with definition photonic chiral kinetic theory framework and work out field-theoretical fermionic using Wigner function formalism. This object has similar properties to is conserved non-interacti...

The cubic vortical Whitham equation is a model for wave motion on vertically sheared current of constant vorticity in shallow inviscid fluid. It generalizes the classical by allowing and adding nonlinear term. inclusion this extra term allows to admit periodic, traveling-wave solutions with larger amplitude than equation. Increasing leads as well. stability these examined numerically. All moder...

The exchange of nutrients and dissolved gasses between corals and their environment is a critical determinant of the growth of coral colonies and the productivity of coral reefs. To date, this exchange has been assumed to be limited by molecular diffusion through an unstirred boundary layer extending 1-2 mm from the coral surface, with corals relying solely on external flow to overcome this lim...

The accurate prediction of turbulent flows separating from curved and otherwise continuous surfaces is one of the most difficult tasks for any computational framework. Among several difficulties, two major ones are the unsteady, spatially varying separation region – usually involving patches of alternately separated and attached flow and the need to resolve accurately the very thin near-wall la...

The flow field of a radial wall jet created by the impingement of a round synthetic jet normal to a flat surface was characterized using hot-wire anemometry. In the synthetic wall jets the width of the outer layer was observed to increase linearly with the radial distance along the wall, while the local maximum velocity varied inversely. The synthetic wall jet exhibits self-similar behavior as ...

Methods 12 healthy controls (age 9-53 years) and 8 patients (age 8-37 years) with a corrected atrioventricular septal defect and a mean mitral valve regurgitation of 25% (range 1937%) were included. The maximal left atrial volume (LAV) was calculated based on the biplane area-length method from a standardized 2and 4-chamber view. Whole-heart 4D Flow MRI was performed on a 3T MR scanner with fre...

Localized arc-filament plasma actuators, placed near the nozzle lip of a laboratory jet, have recently been demonstrated to have sufficient control authority to significantly excite the jet downstream M. Samimy et al., J. Fluid Mech. 578, 305 2007 . This class of plasma actuator, which in this application is recessed in a small cavity near the nozzle lip, causes intense local heating. This heat...