Roller Peristaltic Pump: Occlusion & Flow Ripple |…

What is a Roller Peristaltic Pump

A roller peristaltic pump is a device that uses rotating rollers to compress a flexible tube, creating a series of fluid slugs that are pushed forward. This mechanism is widely used in medical and industrial settings for its ability to handle fluids without contamination.

The core principle involves the rollers occluding (compressing) the tube at regular intervals, which drives the fluid along the length of the tube.

Mechanics of Occlusion

Occlusion in a peristaltic pump refers to the compression of the flexible tube by rotating rollers. As the rollers compress the tube, they create a vacuum behind them that pulls fluid into the tube and then expels it as the roller moves forward.

The degree of occlusion can be adjusted using the control sliders, which directly influence how much of the tube is compressed at any given time.

live demo · related simulation● LIVE

Impact on Flow Rate and Pulsation Ripple

Adjusting the parameters such as rotor speed (RPM), tube inner diameter, and occlusion percentage can significantly affect both the average flow rate and the pulsation ripple of the fluid. Higher RPM generally increases the flow rate but may also increase pulsation.

The number of rollers used in the pump affects the smoothness of the flow; more rollers tend to reduce pulsation but require higher power consumption.

Real-World Applications

Peristaltic pumps are crucial in medical applications such as dialysis machines, where precise and controlled fluid delivery is essential. They are also used in industrial settings for pumping viscous fluids like paints and slurries.

Understanding the mechanics of occlusion helps in optimizing pump performance and ensuring reliable operation across various industries.

Frequently asked questions

How does changing RPM affect the flow rate?

Increasing RPM generally increases the flow rate as it compresses the tube more frequently, but this can also increase pulsation due to the higher frequency of occlusion.

Why is the number of rollers important in a peristaltic pump?

The number of rollers affects the smoothness of fluid flow; more rollers reduce pulsation by creating smoother compression waves, but they also require more power and can be less efficient at lower RPMs.

Can occlusion percentage be too high or too low?

Occlusion percentage should not be too high as it could lead to excessive pressure and potential damage to the tube. Conversely, a very low occlusion might result in insufficient fluid movement.

What are some common applications of peristaltic pumps?

Peristaltic pumps are used in medical devices like dialysis machines, food processing for pumping viscous liquids, and industrial settings for handling hazardous or sensitive fluids.

Try it live

Everything above runs in your browser — open Roller Peristaltic Pump: Occlusion & Flow Ripple and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.

▶ Open Roller Peristaltic Pump: Occlusion & Flow Ripple simulation