# Flow of Liquid | Definition, Types – Hydrodynamics

Flow of Liquid Definition:
The movement of liquids and gases is generally referred to as “flow,” a concept that describes how fluids behave and how they interact with their surrounding environment. for example, water moving through a channel or pipe, or over a surface. Flow can be either steady or unsteady.

We are giving a detailed and clear sheet on all Physics Notes that are very useful to understand the Basic Physics Concepts.

## Flow of Liquid | Definition, Types – Hydrodynamics

Types of Fluid Flow

• Streamline Flow
• Laminar Flow
• Turbulent Flow

(i) Streamline Flow Definition:
The flow of liquid in which each of its particle follows the same path as followed by the preceding particles is called streamline flow.

Two streamlines cannot cross each other and the greater the crowding of streamlines at a place, the greater is the velocity of liquid at that place and vice-versa.

(ii) Laminar Flow Definition:
The steady flow of liquid over a horizontal surface in the form of layers of different velocities is called laminar flow.

The laminar flow is generally used synonymously with streamline flow of liquid.

(iii) Turbulent Flow Definition:
The flow of liquid with a velocity greater than its critical velocity is disordered and called turbulent flow.

In case of turbulent flow, maximum part of external energy is spent for producing eddies in the liquid and small part of external energy is available for forward flow.

Hydrodynamics:
In physics, hydrodynamics of fluid dynamics explains the mechanism of fluid such as flow of liquids and gases. It has a wide range of applications such as evaluating forces and momentum on aircraft, prediction of weather, etc.