Friday, September 29, 2017

Types of Flow in a Pipe

The type of flow of a liquid depends upon the manner in which the particles unite and move. though there are many types of flows, yet the following are important:

1) Uniform flow : A flow, in which the liquid particles at all sections of a pipe or channel have the same velocities is called a uniform flow.

2) Non Uniform flow :  A flow in which the liquid particles at different sections of a pipe or channel have different velocities is called a non-uniform flow.

3) Streamline flow: A flow, in which each liquid particle has a definite path and the paths of individual particles do not cross each other is called streamline flows.

4) Turbulent Flow: A flow, in which each liquid particle does not have a definite path and the paths of individual particles also cross each other, is called a turbulent flow.

5) Steady flow : A flow, in which the quantity of liquid flowing per second is constant, is called a steady flow. A steady flow may be uniform or non-uniform.

6) Unsteady flow: A flow, in which the quantity of liquid flowing per second is not constant is called an unsteady flow.

7) Compressible flow: A flow, in which the volume of fluid and its density changes during the flow, is called a compressible flow. All the gases are considered to have compressible flow.

8) Incompressible flow : A flow, in which the volume of fluid and its density does not change during the flow, is called an incompressible flow. All the liquids are considered as in-compressible flow.

9) Rotational Flow: A flow, in which the fluid particles also rotate about their own axes while flowing, is called rotational flow.

10) Irrotational Flow: A flow, in which the fluid particles do not rotate about their own axes and retain their original orientation is called irrotational flow.

11) One dimensional flow: A flow, in which the streamlines of its moving particles are represented by straight line is called one-dimension flow.

12) Two dimensional flow : A flow, whose streamline of its moving particles are represented by a curve is called a two dimensional flow.

13) Three dimensional flow: A flow, whose streamlines are represented in space i.e along three mutually perpendicular directions, is called a three dimensional flow.

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