in river meandering, when flow passes through a bend, reduction of flow velocity and rising hydrostatic pressure cause super elevation phenomena at outer side and reduction of water surface at inner-side of the bend. a helical motion results, causing erosion of the outer side of the bend. installation of submerged vanes on the stream bed can reduce erosion of the outer bank significantly. in th...

In this paper, an T shaped dualband microstrip antenna fed by coaxial feed is presented for wearable applications in the ISM band (2.42.5GHz,5.7-5.8GHz).This antenna provides dual band performance. As for the wearable applications, we use a felt as the substrate to make sure the antenna can bend follow human body. The overall size of the proposed antenna is 44mm*36mm*3mm. Different parameters l...

In this paper we discuss the stability of a uniform Fréedericksz configuration in highly anisotropic thin nematic films. We show that the Fréedericksz transition in a bend geometry is at least two-dimensional, and it occurs at field strengths lower than the known classical threshold.

Abstract Disposing of coal gangue and fly-ash on the surface is a risky method with tremendous potential catastrophic consequences for environment. Backfill mining promising practice turning those hazardous wastes into functional backfill materials. Unfortunately, how to efficiently deliver slurry desired places remains under-researched. To address this issue, computational fluid dynamics softw...

Predicting the agglomeration and breakage of solid particles is important when designing a compact efficient water purification process. A coupled computational fluid dynamics model presented where population balance equation applied to track particle size distribution for periodic turbulent pipe flow with 180° bends Reynolds numbers 15,000<Ref<35,000 bend radii rB=dh,rB=1.5dh rB=2.5dh. The cri...

Abstract The Downstream Surge Chamber of a pumped storage power station adopts impedance with an upper chamber layout. tailrace tunnel is connected the connecting pipe through right-angle bifurcated and bend. layout type special water flow conditions are complex. To study its hydraulic characteristics, three-dimensional field mathematical model at bottom surge established, variation law charact...