The objective of this paper is to investigate the effect two typical supercavity flow patterns (double-cavity and wake-closure) on ventilated geometry supercavitating structure further reveal different mechanisms gas leakage for these patterns. An inhomogeneous multiphase model with shear stress transport turbulence was employed validate investigation by experimental results. investigated quant...

An asymptotic representation for entrainment in a two-dimensional steady wake behind a circular cylinder is presented. The Reynolds number R ranges from 20 to 100. The representation is obtained from an asymptotic Navier-Stokes solution that includes the region of the wake where the non-parallelism of the streamlines is not yet negligible. The entrainment is determined as the flow rate variatio...

Evidence suggests that adenosine (AD) is an endogenous sleep factor. The hypnogenic action of AD is mediated through its inhibitory A1 and excitatory A2A receptors. Although AD is thought to be predominantly active in the wake-active region of the basal forebrain (BF), a hypnogenic action of AD has been demonstrated in several other brain areas, including the preoptic area. We hypothesized that...

The covert-rapid eye movement (REM) sleep hypothesis of dreaming suggests that elements of REM sleep emerge during sleep onset, leading to vivid hypnagogic imagery. We tested the physiological part of this hypothesis by analysing scalp-recorded electroencephalograms of 15 human subjects during wake-sleep transition and subsequent night time sleep. Wake-sleep transition was categorised semi-auto...

emergence of primary signs of muslims uprising in tunisia, egypt, libya, bahrain, yemen, and, in a somehow limited form, in arabia and jordan against local tyranny and foreign colonization, made big powers and western expansionist countries to expropriate public movements to their own benefit and to deviate such movements from their true path. in fact, the matter of process or project nature of...

This research has been carried out to determine the marine propeller hydro-acoustic characteristics by Reynolds-Averaged Navier-Stokes (RANS) solver in both uniform and non-uniform wake flow at different operating conditions Wake flow can cause changes in pressure fluctuation and gas effect on propeller noise spectrum. Noise is generated by the induced trailing vortex wake and induced pressure ...