what is Flow & Pressure

Flow and pressure are two related but distinct concepts in fluid dynamics.

Flow refers to the volume or mass of fluid that moves through a given point or area per unit of time. It is usually measured in units such as liters per second, cubic meters per hour, or gallons per minute. Flow is affected by factors such as the size and shape of the pipe or channel through which the fluid is flowing, the velocity of the fluid, and the pressure gradient that drives the flow.

Pressure, on the other hand, refers to the force exerted by the fluid per unit of area. It is usually measured in units such as pounds per square inch (psi), pascals (Pa), or atmospheres (atm). Pressure is affected by factors such as the velocity and density of the fluid, the direction and magnitude of the flow, and the characteristics of the surface with which the fluid is in contact.

In short, flow is a measure of the volume or mass of fluid that moves through a point or area per unit of time, while pressure is a measure of the force per unit of area that the fluid exerts on its surroundings