What are flumes?
Flumes are specially shaped, engineered structures used to measure the flow of water in open channels. Flumes are static in nature – having no moving parts – and develop a relationship between the water level in the flume and the flow rate by restricting the flow of water in various ways.
Is weirs and flumes a flow rate meter?
A very different style of variable-area flow meter is used extensively to measure flow rate through open channels, such as irrigation ditches. If an obstruction is placed within a channel, any liquid flowing through the channel must rise on the upstream side of the obstruction.
Why are flumes used?
Flumes are an accurate and effective way to measure flow rate in open channel flow applications. All flumes work by measuring how much the water rises in level before an obstruction (the flume) of known dimensions and shape. A flume is similar to a weir, but they do not create so large a change in upstream head.
What is flumes in fluid mechanics?
When used to measure the flow of water in open channels, a flume is defined as a specially shaped, fixed hydraulic structure that under free-flow conditions forces flow to accelerate in such a manner that the flow rate through the flume can be characterized by a level-to-flow relationship as applied to a single head ( …
Why are weirs used?
Commonly, weirs are used to prevent flooding, measure water discharge, and help render rivers more navigable by boat. In some locations, the terms dam and weir are synonymous, but normally there is a clear distinction made between the structures.
What does a weir measure?
A flow measuring weir is simply a structure over which water flows in such a way that volumetric flow rate can be calculated…. it lets you know how much water is flowing. Many times a flow measuring weir is simply a thin plate across a flow stream, but weirs can also be broad, thick structures.
What is the difference between free flow and submerged flow?
Unlike free-flow, submerged flow requires the measurement of the head at the primary (Ha) and secondary (Hb) points of measurement – Hb occurring in the throat of the flume. The ratio of downstream head to the upstream head, Hb/Ha, expressed as a percentage, is the submergence ratio.
What is a weir flow meter?
Using a triangular or rectangular weir, this weir type flowmeter accurately determines the amount of wastewater emitted by continuously measuring the hydraulic head. This flowmeter may also be used for measuring the flow rate in water channel where the weir can be installed.
Is flume a real word?
a deep narrow passage or mountain ravine with a stream flowing through it, often with great force: Hikers are warned to stay well clear of the flumes, especially during the spring thaw.
Is Flume an ETL?
Apache Sqoop and Apache Flume are two popular open source etl tools for hadoop that help organizations overcome the challenges encountered in data ingestion.
Where is weir used?
A weir /wɪər/ or low head dam is a barrier across the width of a river that alters the flow characteristics of water and usually results in a change in the height of the river level. Weirs are also used to control the flow of water for outlets of lakes, ponds, and reservoirs.
What are types of weir?
They can be classified as rectangular, triangular and trapezoidal weirs based on the geometry of flow section. They can be classified into sharp crested and broad-crested weirs based on the sharpness of the crest.
How do weirs work?
A weir is a small barrier built across a stream or river to raise the water level slightly on the upstream side; essentially a small-scale dam. Weirs allow water to pool behind them, while allowing water to flow steadily over top of the weir.
What are submerged weirs?
As the name suggests, weir flow is submerged when the weir itself is underwater, though it’s important to remember that submerged weir flow technically encompasses all conditions in which the discharge of water from the weir is impacted by the downstream conditions.
What is a submerged flow?
Submerged (or drowned) flow occurs when the water surface downstream from the flume is high enough to reduce flow through a flume.
How do you use flume in a sentence?
Flume sentence example The Princess pressed a button that turned on the pool area including the water flume. They have some water rides too – their log flume is great fun! Splash around in the indoor pool where you can relax in the spa bath or have fun on the water flume.
What are the different components of Flume?
Flume Components. A Flume data flow is made up of five main components: Events, Sources, Channels, Sinks, and Agents. An event is the basic unit of data that is moved using Flume.