What is the difference between notch and orifice

The material of casting of notch will be usually a metallic pipe. Notches will be small in size and will be preferred to use for measuring the small discharge of small stream or canal. Type of notches There are following types of notches as mentioned here.

A weir will be basically a concrete or masonary structure which will be located in an open channel over which flow will take place. We can also define as the structure constructed across the river or large canal for storing water on upstream side.

Top of weir over which water flow will take place will be termed as crest. Weir will be used for measuring the large discharge of rivers or large canals. Weir will be usually in the form of vertical wall, with a sharp edge at the top, running all the way across the open channel. Notches will be small in size but weir will be bigger in size. A weir will be basically made by a concrete or masonary structure. There are following types of weirs as mentioned here. Rectangular weir Cippoletti weir Ordinary weir Submerged or drowned weir Narrow crested weir Broad crested weir Sharp crested weir Ogee weir.

Now we will go ahead to find out the classifications of notches and weirs, in the subject of fluid mechanics, in our next post. Do you have any suggestions? Please write in comment box.

Reference: Fluid mechanics, By R. Bansal Image Courtesy: Google Also read. Why do poets use sound effects. What is the difference between a poetic line and a sentence. How is a simile different from other types of figurative language. Economics 23 cards. What is a sporophyte. What are examples of Prokaryotes. Explain why elasticity of demand is such an important concept to marketers who sell a commodity product.

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Which of the following are responsible for the differences between species and for differences between individuals in the same population? What are the differences between the Mayans and the arawaks? A weir is a concrete or masonry structure which is located at the bottom side throughout width in the path of fluid flow.

The fluid generally water flow above the weir. A weir is generally used to regulate flow of water at a large scale, like in rivers or canals.

A weir has considerable width along the length of fluid flow. Before moving further in our discussion on notches and weirs let us first understand two important terms, which will help us in understanding types of both. These terms are Nappe and Crest. The layer of fluid flowing above the weir or below the notch is known as Nappe or Vain. 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.

Weirs can be classified on the basis of shape of opening, on the basis shape of Crest or Sill and on the basis of effects of sides on the Nappe or Vein. Now to have better clarity on notches and weirs, we should understand differences between them.