At the smallest scales of sediment transport in rivers, the coherent structures of the turbulent boundary layer constitute the fundamental mechanisms of bedload transport, locally increasing the instantaneous hydrodynamic forces acting on sediment particles, and mobilizing them downstream. Near the critical threshold for initiating sediment motion, the interactions of the particles with these u...

The positioning of wireless nodes in indoor Wireless Local Area Network (WLAN) using Received Signal Strength Indication (RSSI) has become an attractive low cost localization solution. The location accuracy of RSSI based algorithms is dependent on node placement topology. The localization performance analysis reported for nodes arranged in V-shaped linear configuration. The uniqueness of this w...

This paper presents an experimental research on the distribution of local friction factor, fb, and global friction factor, f, over the cross-section of a channel with V-shaped bottom, which typically occurs in sewers and culverts. Several series of experiments were conducted for measuring velocity and boundary shear stress. It is found that, Darcy-Weisbach, f, is more sensitive than other resis...

Deformation of the silo wall due to the single ball impact is modeled in ANSYS. The material in silo, as a Winkler bed, is replaced by spring-damper elements and the spring stiffness and damper coefficients are evaluated of the granular material and wall properties. The granular material deformation under the specified force is measured to evaluate the granular stiffness to be used for determin...

[1] Laboratory measurements reveal the flow structure within and above a model seagrass meadow (dynamically similar to Zostera marina) forced by progressive waves. Despite being driven by purely oscillatory flow, a mean current in the direction of wave propagation is generated within the meadow. This mean current is forced by a nonzero wave stress, similar to the streaming observed in wave boun...

Zn–air fuel cells are promising energy storage devices for renewable and power sources, as they cost-effective have high density. However, limited charge discharge cycles low round-trip efficiency long been obstacles to large-scale market deployment. Herein, a new fluidized-bed zinc–air cell is designed, constructed, tested, characterized. The integration of the fluidized bed in leads key advan...

Evaluation of the risk bed-separation water inrush (BWI) hazards in Cretaceous strata is required for safe mining Ordos Basin, China. In this paper, three coal mines Basin were selected detailed evaluation risk. The multifactor superposition method and stress balance arch theory used to obtain from bed separations at different excavation lengths. First, related BWI factors analyzed, index any c...

Pools are often observed in gravel-bed rivers, together with the presence of vegetation patches. In present study, a conceptual model gradual varied flow both convective deceleration and acceleration sections has been constructed flume to study turbulent structures. Vegetation patches extended canopies were planted pool order increase thickness boundary layer inside inner zone. The effects diff...

[1] It is necessary to improve our understanding of the exchange of dissolved constituents between surface and subsurface waters in river systems in order to better evaluate the fate of water‐borne contaminants and nutrients and their effects on water quality and aquatic ecosystems. Here we present a model that can predict hyporheic exchange at the bed‐form‐to‐reach scale using readily measurab...