What is the difference between notch and orifice?
An orifice may be defined as an opening provided in the side or bottom of tank or vessel such that the liquid flows through the entire orifice. A notch may be defined as an opening provided in the side of tank or vessel such that the liquid surface in tank is below the top edge of opening.
What is the use of weir and notch?
The applications of notch include tanks, reservoirs, or any water storage devices that have a passage for water escape. Similarly, a weir is a notch on a large scale used to measure flows of rivers and canals. Apart from measuring, notch and weir are also used to regulate the discharge of small and large channels.
What is a notch explain?
noun. an angular or V-shaped cut, indentation, or slit in an object, surface, or edge. a cut or nick made in a stick or other object for record, as in keeping a tally.
What types of notches are there?
5.1. According to the shape of opening, notches can be classified as
- Stepped notch.
- Trapezoidal notch.
- Triangular notch.
- Rectangular notch.
Where are notches used?
Notches are commonly used in material impact tests where a morphological crack of a controlled origin is necessary to achieve standardized characterization of fracture resistance of the material. The most common is the Charpy impact test, which uses a pendulum hammer (striker) to strike a horizontal notched specimen.
What is ogee weir?
An ogee crest weir is a common weir type whose cross-sectional profile corresponds to the shape of the underside of a sharp-crested weir nappe. Just as the shape or trajectory of the sharp-crested weir nappe changes with flow rate, so does the ogee crest profile.
What is weir Engineering?
A weir is a small dam built across a river to control the upstream water level. Weirs have been used for ages to control the flow of water in streams, rivers, and other water bodies.
Are dam and weir the same?
Dams: A dam is a big wall constructed across a valley to control the flow or raise the level of water held within a catchment area. A weir is a steel or concrete barrier constructed across a river or creek that regulates water flow and allows water to be slowly released to users downstream.
Why do we use weir?
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.
How are notches and weirs classified?
A notch is usually made of metal plate whereas a weir is made of masonry or concrete. The bottom edge over which the water flows is called the sill or the crest of water the notch. They can be classified as rectangular, triangular and trapezoidal weirs based on the geometry of flow section.
What is the purpose of V notch?
Triangular weirs are sharp crested thin plates with V-shaped opening (or notch). These plates are installed at the exit of a channel, tank, or basin in order to measure the real-time flow of water. For a given weir profile size and shape, the flow of water is related to the head of water at the weir.
What are notches and weirs?
The bottom edge of notch or the top edge of weir is known as Crest (or Sill). Now we can move our discussion further on the types of Notches and Weirs. Notches can be further classified on the basis of shape of opening and on the basis of effects of the sides on Nappe (or Vein). 5.1. According to the shape of opening, notches can be classified as
What is the purpose of Weir and notch in hydraulics?
The purpose of weir & notch is to measure dischage of fluid specially water.Notch is smaller one made of iron plate, steel , tin etc specially used in hydraulics labortory for students to measure the discharge of water or flow.Weir is the bigger one found in field across a water course, nullah, small river etc made of stone or concrete.
What is the meaning of Weir?
A weir is a notch on a large scale, used, for example, to measure the flow of a river, and may be sharp edged or have a substantial breadth in the direction of flow. A structure, used to dam up a stream or river, over which the water flows, is called a weir.
What are the different types of notches?
Classification of Notches: 1 The Rectangular Notch: 2 The Triangular Notch or V-Notch: ADVERTISEMENTS: 3 The Trapezoidal Notch: