The hydrodynamics of distributary channels has tremendous impact on nutrient and dissolved oxygen circulation, transport of sediments, and delta formation and evolution; yet many processes acting at the river–marine interface of a delta are poorly understood. This paper investigates the combined effect of river hydrograph and micro-tides on the hydrodynamics of a delta distributary. As the rati...

Flash ironmaking technology (FIT) is a potential alternative process reducing energy consumption and environmental pollution. The newly proposed counter-current flash has more reasonable temperature concentration distribution, while the high dust rate cannot be avoided. In this study, swirling configuration was introduced to improve control performance. A comprehensive computational fluid dynam...

As a result of the durability problems associated with the first Abrams-Lucas mitral valve, a redesigned model has recently been introduced into limited clinical trials. The new valve was subjected to in-vitro pulsatile flow studies, and measurements were made of mean diastolic pressure gradient and volume of reflux on closure. Similar measurements were made on other mitral valve prostheses of ...

Vortex breakdown (VB) in unconfined swirling jets occurs as either a bubble form of vortex (BVB) or conical (CVB). This computational study examines flow features these forms for Reynolds number at which VB is accompanied by transition to turbulence ( $Re = 1000$ , based on inflow jet radius and centreline velocity). Large eddy simulations were performed with the condition Maxworthy profile mod...

The paper reviews striking features of swirling flows—collapse, swirl generation, vortex breakdown, hysteresis, and axisymmetry breaking—and the mechanisms involved with the help of conical similarity solutions of the Navier-Stokes equations. The strong accumulation of axial and angular momenta, observed in tornadoes and flows over delta wings, corresponds to collapse, i.e. the singularity deve...