What is the flow curve?

Two types of graph can be described as a flow curve depending on the application. One application is in the field of fluid mechanics, where the flow curve shows the relationship between dynamic viscosity and shear speed of fluid. Flow curves can also be applied to pumps, in which case they illustrate the relationship between the volume flow of the pump and the head of the pump. In other words, dynamic viscosity indicates the amount of force required to move the fluid. The skid is the pressure that is experiencing liquid due to the forces that are parallel to the flow - mainly the forces developed by the walls of the pipeline or channel. The shear speed is directly proportional to the fluid speed, because the faster it flows, the more cut it is.

On the fluid flow curve, the dynamic viscosity is plotted on the Y -axis and the speed of the skid is plotted on the x -axis. The resulting curve shows the relationship between the two fluid properties. For the Newtonian fluid in which the dynamic viscosity is independent of shear speed is the flow curve with line and slope of linKY is a dynamic viscosity. However, Nenwton fluids behave differently and their flow curves are generally curved lines with different shapes. Some fluids are even dependent on time, which means they have a memory that affects the shape of the curve.

The

pump flow is plotted on the axis of the x pump flow curve, also called the system curve, and the pump head is plotted to the Y -axis. The pump head is a term used to describe the pressure loss in the pump. It is a combination of height or static head, which is the difference in the height between the input and the pump output and the loss of the head in the system, which is mostly caused by pipes and fittings. Although the head is a unit of pressure, it is usually measured in footsteps or meters - the water must be traveling more and more, the more pressure is lost.

The pump flow curve can be used to determine optimal operating conditions for the pump. If the user knows the flow they need, he can find a head loss for this flow using a system curve. By overlapping a curveThe power curve that shows the power for pumps of different sizes, the user can find optimally pump size for their system requirements.