From Flow Measurement
The majority of industrial liquid flows are carried in closed conduits that flow
completely full and under pressure. However, this is not always the case for high
volume flows of liquids in industrial waste systems, waterworks, sanitary and
storm sewers, and irrigation systems. The flows in these situations are commonly
carried in open channels, which are characterized by low system heads and high
volumetric flow rates. This chapter will discuss the techniques used for measuring
flow in open channels.
Open Channel Flow
There are two basic types of flow systems: flow in closed conduits and flow in
open channels. Closed conduit flow is flow in completely filled pipes. Pipes are
usually used for fresh water lines or for industrial process lines, and flow through
them is often measured by some type of device inserted into the line.
Open channel flow is flow in any channel in which the liquid flows with a free
surface. Examples of this are rivers, irrigation ditches, canals, flumes, and other
uncovered conduits. Certain closed channels, such as sewers and tunnels when
flowing partially full and not under pressure, are also classified as open channels.
Open channels are used in most storm and sanitary sewer systems,...
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Topics of Interest
Oscillatory flowmeters employ vortex formation and the Coanda effect, both of which produce a digital or pulse output that comes from the natural dynamics and physics of the fluid. This natural...
Open Channel Flowmeters Theory High volume flow of liquids in industrial waste systems, waterworks, and irrigations systems are commonly carried in open channels, which are characterized by low...
Open channels are natural or manmade conveyance structures that normally have an open top, and they include rivers, streams and estuaries. An important characteristic of open-channel flow is that it...
3 Sewer Systems Sewers are underground conduits to convey wastewater and storm-water to a treatment plant or to carry stormwater to the point of disposal. Sewers can be classified into three...
3 Sewer Systems Sewers are underground conduits to convey wastewater and stormwater to a treatment plant or to carry stormwater to the point of disposal. Sewers can be classified into three...