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Related Concept Videos

Fluid Pressure01:14

Fluid Pressure

581
In mechanical engineering, fluid pressure plays a critical role in designing systems that utilize liquid flow, such as hydraulic systems, pumps, and valves. When designing these systems, engineers must ensure they can withstand the forces created by fluid pressure to avoid damage or failure.
According to Pascal's law, a fluid at rest will generate equal pressure in all directions. This pressure is measured as a force per unit area, and its magnitude depends on the fluid's specific...
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Application of Pascal's Law01:03

Application of Pascal's Law

8.0K
Pascal's experimentally proven observations—that a change in pressure applied to an enclosed fluid is transmitted undiminished throughout the fluid and to the walls of its container—provide the foundations for hydraulics, one of the most important developments in modern mechanical technology.
Hydraulic systems are used to operate automotive brakes, hydraulic jacks, and numerous other mechanical systems. We can derive a relationship between the forces in a simple hydraulic system...
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Related Experiment Video

Updated: Jun 5, 2025

High Speed Droplet-based Delivery System for Passive Pumping in Microfluidic Devices
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High Speed Droplet-based Delivery System for Passive Pumping in Microfluidic Devices

Published on: September 2, 2009

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Open-source pneumatic pressure pump for drop-based microfluidic flow controls.

Humberto S Sanchez1,2, Connie B Chang1,2,3

  • 1Center for Biofilm Engineering, Montana State University, Bozeman, MT 59717, United States of America.

Engineering Research Express
|December 9, 2024
PubMed
Summary
This summary is machine-generated.

An open-source pneumatic pressure pump offers a cost-effective solution for microfluidic fluid flow control. This novel system precisely manages pressure, enabling accurate droplet generation in microfluidic devices.

Keywords:
drop-based microfluidicsmicrofluidicsopen-sourcepressure-driven flow

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Area of Science:

  • Engineering
  • Microfluidics
  • Open-Source Hardware

Background:

  • Commercial pneumatic pressure systems for microfluidics can be expensive and lack customization.
  • There is a need for accessible and adaptable fluid control solutions in microfluidic research.

Purpose of the Study:

  • To engineer an open-source pneumatic pressure pump for precise fluid flow control in microfluidic devices.
  • To provide a cost-effective and customizable alternative to existing commercial systems.

Main Methods:

  • Designed and implemented an open-source pneumatic pressure pump using a single microcontroller and four dual-valve pressure regulators.
  • Developed control software in the Arduino environment and a user interface in Python.
  • Validated pump performance using water and fluorinated oil, assessing pressure control accuracy, response time, and overshoot.

Main Results:

  • The pump achieved accurate pressure control with a resolution < 0.02 psig and rapid response times (< 1 second).
  • Setting response times were < 2 seconds with overshoot < 30%.
  • Successfully generated water-in-oil drops, demonstrating expected scaling of drop size with applied pressures.

Conclusions:

  • The developed open-source pneumatic pump provides precise and rapid fluid flow control for microfluidic applications.
  • This custom-made dual-valve regulator design advances the development of fully open-source systems for microfluidics.
  • The system offers a viable, cost-effective, and customizable alternative for researchers in the field.