An increase in seawater that experiences high tides can cause tidal flooding. Tidal flooding the Semarang area requires quick and precise handling, so an emergency dam is needed to deal with overflow or This study discusses Knock-Down weir as a practical weir. also aims test shear stability of model against wall roughness based on variations soil types, namely: masonry, gravel, sand, clay. The ...

one of the most important discharge control ways in hydraulic structures is side weir which is used in irrigation, water distribution, waste-water engineering, drainage, flood control and other water related projects.in order to increases cm value and control on water surface when there is restriction in the weir length(l), side weir with different geometry is used. in present research seventhl...

Forced hydraulic jump in a horizontal stilling basin with one and two continuous sills at the downstream end of an ogee standard weir was investigated. Experiments were completed on sills of five different heights which were fixed at two different distances from the toe of the weir. The main characteristics of the jump such as the sequent depth ratio, relative roller length, and relative ener...

The piano key weir (PKW) is a type of nonlinear control structure that can be used to increase unit discharge over linear overflow weir geometries, particularly when the weir footprint area is restricted To predict the outflow passing over a piano key weir, the discharge coefficient in the general equation of weir needs to be known. This paper presents the results of laboratory model testing of...

In the present study, effects of different oblique angles and diameters on cylindrical weir below a gate as combined device have been studied experimentally. For this purpose, sixteen models weir-gate structures tested in laboratory flume. These had four α (300, 450, 600, 900). each angle, diameter changed times (4, 7.3, 9, 11cm). The results all indicate that theoretical discharge (Qth) is inv...

Abstract Weirs are structures that important for measuring flow and controlling water levels. Research has shown the discharge coefficient is not constant depends on crest length, height of weir, upstream head, downstream slopes. In this study, effect these parameters ( C d ) investigated by numerical simulation. The current study present simulation using ANSYS FLUENT software. total number sim...

side weirs are flow diversion devices that are widely used in irrigation, drainage and urban sewage systems. the present study focuses on the investigation of the effect of oblique side weirs on the discharge coefficient of a side weir under subcritical flow condition in rectangular channels. in this study 106 laboratory tests were conducted and the results were analyzed to find out the influen...

A new parabolic–shaped guided valve tray is proposed. The gas–liquid two–phase flow of parabolic and conventional rectangular trays simulated using the computational fluid dynamics (CFD) method. clear liquid height on was predicted for different combinations superficial gas velocity, intensity weir height. values were in good agreement with calculated ones. has a more uniform form by comparing ...

in this study, a laboratory scale continuous plug flow fluidized bed dryer was designed and constructed. a backward-curved centrifugal fan with a 4 kw electromotor was selected based on the maximum pressure drop in the minimum fluidization state and the ability to produce the velocity required for fluidization of the most granular agricultural materials. the fluidization chamber was a rectangul...