geometry of the chute blocks in stilling basins plays a significant role in size and type of these structures. one of the most influencing factors in the design of the blocks is the fluctuating pressure which may cause fatigue on the blocks. despite investigations conducted by many researchers, there is not enough information about the pressure fluctuation around chute blocks in compacted still...

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 mining chute is an important equipment in the process of coal transportation and coal screening preparation. During the working process, the mining chute will generate a lot of vibration and noise because of constantly friction and impact of gangue and coal blocks. In order to reduce the vibration and noise during the operation of the chute, a new type of foam aluminum laminated structure i...

Stilling basins are designed to reduce the high kinetic energy of supercritical flow in a downstream spillway. The USBR II stilling basin is distinguished by chute blocks fixed at upstream end and dented sill end, allowing for effective dissipation excess energy. This research investigates effect chute-block geometry on hydraulic performance basin. Six modified chute-blocks with identical dimen...

Received (received date) Revised (revised date) A computational study of sliding blocks on inclined surfaces is presented. Assuming that the friction coefficient µ is a function of position, the probability P (λ) for the block to slide down over a length λ is numerically calculated. Our results are consistent with recent experimental data suggesting a power-law distribution of events over a wid...

A cellular automata model is used to simulate a variety of granular chute flows. The model is tested against several case studies: flow down a chute, flow past an obstacle, chute flow in which complex, counter-rotating vortices result in streamwise surface stripes and flownear a boundary. Themodel successfully reproduces experimental observations in all of these cases. These results lead us to ...

Purpose. We evaluated the efficacy and safety of a mechanical device, the P-chute, in corneal endothelium preservation during phacoemulsification in a rabbit model. Methods. Twenty-four rabbits were randomly assigned into 2 groups. One eye of each rabbit underwent phacoemulsification that simulated the removal of a dense nucleus, with or without the P-chute. Serial slit-lamp examinations, anter...

BACKGROUND The use of vertical chute marine evacuation systems (MES) is now well established on board marine passenger vessels; this system has yet to be deployed in an emergency situation, however, it has been associated with a fatality and several major injuries during training. Brunel University's Ethics Committee endorsed an initial retrospective cross sectional study (Harwood and Farrow, 2...

Effects of three different handling aids on calf behavior were determined. Group 1 calves were intensively-reared intact Holstein males (mean 180 days old); Group 2, extensively-reared beef-breed females (mean 230 days); Group 3, extensively-reared castrated beef-breed males (mean 253 days). Calves in each group were assigned to one of three handling aid treatments (n=5 per treatment subgroup; ...