In dynamical systems examples are common in which two or more attractors coexist and in such cases the basin boundary is non-empty. The purpose of this paper is to describe the structure and properties of basins and their boundaries for two-dimensional diffeomorphisms. If a two-dimensional basin has a basin cell (a trapping region whose boundary consists of pieces of the stable and unstable man...

Scour downstream (DS) of hydraulic structures (HS) may endanger the safety of the structures if the necessary precuations are not considered during the design stage. Normally, different measures produce different effects on reducing the maximum scour depth DS of HS. One of the important HSs is the abruptly enlarged (or sudden expanding) stilling basins. In this paper, the effects of different a...

Abstract The USBR VI stilling basin is one of the oldest basins designed to dissipate energy at outlet pipes. In this study, effect two parameters including Froude number (Fr) inlet flow and ratio width equivalent depth ( W / D ) on characteristics mean turbulent inside were investigated, numerically. Reynolds Averaged Navier–Stokes (RANS) equations solved with Re-Normalization Group (RNG) k-ε ...

abstractinduced total pressure by flow, including mean and fluctuating components, around a selected chute block in saf stilling basins downstream of an ogee spillway was studied. several pressure holes were selected on various faces of a selected chute block to get enough information regarding the total pressure field. this paper reports the results of an experimental work and measurement of m...

The structure of the adrenal tissue was investigated by both histological and histochemical techniques. It is shown that the adrenal contains 4 types of tissues; these are named the steroid, Stilling, lymphoid, and chromaffin tissues. The structure of the adrenal in the bullfrog does not provide any evidence to support a theory of zonation within the cortical tissue of the Anura, as suggested b...