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the mechanism of flow and sediment transport in channel bend is much complex. because of secondary current, the sediment moves away from outer bank toward inner bank and therefore outer bank of the bend is one of best positions for lateral diversion. in this paper, the mechanism of sediment transport was simulated with ssiim software in the u shape channel with lateral intake. in order to verif...

This paper investigates the self-cleansing performance of an airlift pump with a U-bend. For this purpose, experimental setup is used to assess effect air flow on pump's ability lift water and remove particles under different submergence ratios particle concentrations. In addition, simple yet accurate fluid mechanical model interpret experiments individual predict critical velocity required for...

Determination of the characteristics pH sensor using U-shaped optical fiber was carried out with various varieties, namely length without a coat, indentation diameter, and number imperfections. Optical as light transmission medium is used to detect level solution. The output read on OPM in form power. best characteristic obtained imperfections, imperfections 3 value range 32.0 µW, sensitivity 3...

computational fluid dynamics (cfd) simulations of gas-solid flow through a positive low-pressure pneumatic conveyor were performed using eulerian-eulerian framework. pressure drop in pneumatic conveying pipelines, creation and destruction of plugs along the horizontal and vertical pipes, effect of 90° elbows and u-bends on cross-section concentrations, and rope formation and dispersion were num...

Abstract Pressure drop and flow pattern of oil–water flows were investigated in a 19-mm ID clear polyvinyl chloride pipe consisting U -bend with radius curvature 100 mm. The range for oil water superficial velocities tested was $$0.04 \le U_{{{\text{so}}}} 0.950 \;{\text{m/s}}$$ 0.04≤<...

This study collects experiences from existing systems with urine diversion and dry handling of faecal matter and presents design recommendations for improved function of new systems. Urine collection and piping systems were studied in four large residential areas in Scandinavia and South Africa where urine had been collected separately for 5-9 years and dry faeces collected for 4-15 years. We f...

This paper presents a numerical study of local mass transfer coefficients in a 90° bend using the RNG version of k–e model to include the influence of curvature on the turbulent transport. Simulations were performed for flow through a 90°, 3-D bend for Reynolds numbers of 13500, 90000, and 390000, Schmidt numbers of 2.53 and 700 and curvature ratios of 1.5, 2, and 2.5. The differences betwe...