I T HAS long been known that one of the most striking features of the normal renal circulation is its autonomous capacity to change its resistance in the face of changed arterial pressure, so that renal blood flow stays relatively constant.' 2 Ever since, there has been much question as to whether this renal circulatory autoregulation is caused by a vital vasomotor response or by a passive phys...

Air–water flows at hydraulic structures are commonly observed and called white waters. The free-surface aeration is characterised by some intense exchanges of air and water leading to complex air–water structures including some clustering. The number and properties of clusters may provide some measure of the level of particle-turbulence and particle–particle interactions in the high-velocity ai...

Large-eddy simulation (LES) equipped with the one-equation subgrid-scale (SGS) model is employed to investigate the mean flows and turbulence over idealized two-dimensional (2D) street canyons in various unstable thermal stratifications. The building-height-tostreet-width (aspect) ratio is equalto unity so the flows inside a street canyon are in the skimming flow regime. Periodic boundaries are...

To determine the direct effects of hematocrit on intestinal oxygen consumption and to determine whether an optimal hematocrit exists for intestinal oxygenation, we perfused isolated canine gut loops at a constant pressure (120 mm Hg) and varied hematocrit from 80% to 10%. As hematocrit fell, blood flow rose while arterial oxygen content fell. The regression of blood flow on hematocrit was linea...

mirage effect is contactless and non destructive method which has been used a lot to determine thermal properties of different  kind of samples , transverse photothermal deflection ptd in  skimming configuration with ccd camera  and special programs is used to determine thermal conductivity of porous silicon ps  film. ps samples were prepared by electrochemical etching. thermal conductivity wit...

Abstract The spillways are one of the most important hydraulic structures used in river engineering, dam construction, irrigation, and drainage engineering projects. Recently, a new type such with circular crest has been proposed. In this paper, properties crested stepped spillway (CCSS) including flow pattern, distribution velocity on pressure, turbulence intensity, discharge coefficient ( $${...