investigation on local scour phenomenon downstream of impinging jets is very complicated. different parameters such as geometry of stream, characteristics of flow and sediments have great influences on the scour phenomenon. the present study is preceded to numerical modeling of scouring by impinging jet via ssiim 2 model founded on a physical model tests. the numerical model is calibrated for r...

A Chitosan/sucrose/polyurethane composite bio-membrane was prepared by the facile drop coating method. The composite bio-membrane had a porous spongy structure composed of a physical mixing of each component. The water absorbability of the composite bio-membrane increased with increasing chitosan and sucrose contents. Furthermore, the composite bio-membrane with immobilized Aspergillus sojae ex...

In offshore structures, most of failures are caused by the lack of sufficient piles strength. Scour phenomena affects the load transition and the pile strength. The necessity of the consideration of scouring phenomena amplifies when the scour depth becomes remarkable, which can endanger the jacket stability. In this paper, a new method is used to consider the pile scouring using nonlinear pusho...

This research explores how a circular collar with tilt angle (counterclockwise around the direction of channel cross-section) could affect local scour depth single cylindrical pier in clear-water based on Large Eddy Simulation (LES) six cases. The results show that horizontal is best for reducing depth. With increases angle, effect decreases gradually and even counterproductive at equilibrium. ...

Although tidal marshes are known for their coastal defense function during storm surges, the impact of extreme wave forcing on marsh development is poorly understood. Seedling survival in first season after germination, which may involve exposure to events, crucial natural establishment and human restoration marshes. We hypothesize that species-specific plant traits plays a significant role see...

Massive elliptical galaxies are typically observed to have central cores in their projected radial light profiles. Such long been thought form through `binary scouring' as supermassive black holes (SMBHs), brought mergers, a hard binary and eject stars from the galactic centre. However, most massive cores, like ~3kpc core A2261-BCG, remain challenging explain this way. In paper, we run suite of...

Abstract Local scouring around the piers of a bridge is one major reasons for failure, potentially resulting in heavy losses terms both economy and human life. Prediction accurate depth local difficult task due to many factors that contribute this process, however. The main aim study thus offer new formula prediction pier using modern fine computing modelling technique known as gene expression ...

Abstract Egyptian Chorisia hollow fibers have been blended with cotton waste, polyester and raw bamboo at various ratios weft counts using open-end spinning. The fabrics of hybrid composites were subjected to atmospheric plasma, pectinase, lipase enzyme treatments, as well the substitution all hazardous chemicals, sustainable alternatives traditional alkaline scouring. impacts treatments on hol...