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Related Concept Videos

Fluid Pressure01:14

Fluid Pressure

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 weight or...
Electro-mechanical Systems01:19

Electro-mechanical Systems

Electromechanical systems are intricate configurations that effectively combine electrical and mechanical elements to achieve a desired outcome. Central to many of these systems is the DC motor, a device that converts electrical energy into mechanical motion, enabling various applications ranging from simple fans to complex robotic mechanisms.
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
Hydraulic Jump01:29

Hydraulic Jump

A hydraulic jump is a sudden rise in fluid depth in open channels, occurring when high-velocity (supercritical) flow transitions to low-velocity (subcritical) flow. This phenomenon requires an upstream Froude number greater than 1, as flows with Fr1<1 remain subcritical, making a hydraulic jump impossible due to the need for negative head loss, which violates thermodynamic principles.The characteristics of a hydraulic jump depend on the upstream Froude number and are classified as...
Application of the Energy Equation01:04

Application of the Energy Equation

The application of the energy equation to centrifugal pumps is a fundamental principle in fluid dynamics and engineering. In this scenario, the energy equation is used to calculate the flow rate of a centrifugal pump responsible for transferring water between two reservoirs at different elevations. The pump applies an energy input of 7500 joules per second, and the vertical difference between the lower and upper reservoirs is 10 meters. Additionally, the head loss due to friction and other...
Application of Pascal's Law01:03

Application of Pascal's Law

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 by applying...
Electrochemical Systems01:24

Electrochemical Systems

Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution, the Zn metal, composed...

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Related Experiment Video

Updated: Jul 17, 2026

Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions
08:41

Generation and Control of Electrohydrodynamic Flows in Aqueous Electrolyte Solutions

Published on: September 7, 2018

Soft electrohydrodynamic pumps for fluidic power systems.

Chengliang Tao1, Xiaxia Cheng1, Hongbiao Sun1

  • 1School of Mechanical Engineering, Sichuan University, Chengdu 610065, China. wangjiangxin@scu.edu.cn.

Nanoscale
|July 15, 2026
PubMed
Summary

Electrohydrodynamic pumps offer compact, quiet fluidic actuation for soft robotics and wearables. This review details their mechanisms, designs, and applications, highlighting future research directions.

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Area of Science:

  • Soft fluidic technologies
  • Electrohydrodynamics
  • Wearable electronics

Background:

  • Soft fluidic technologies have advanced rapidly, leading to the development of novel soft pumps.
  • Electrohydrodynamic (EHD) pumps offer advantages like compact size, quiet operation, and conformable architecture.
  • EHD pumps are emerging as key components in soft actuators, soft robotics, and wearable devices.

Purpose of the Study:

  • To review recent advancements in electrohydrodynamic pumps.
  • To explain the operating mechanisms of charge generation and transfer in dielectric media.
  • To compare different structural design strategies and their characteristics.

Main Methods:

  • Systematic review of recent literature on EHD pumps.
  • Analysis of charge generation and transfer principles in dielectric fluids.
  • Comparative study of various structural designs and their performance.

Main Results:

  • EHD pumps demonstrate significant potential in soft actuators, soft robotics, and thermal management for wearable electronics.
  • Different structural designs exhibit unique characteristics suitable for specific applications.
  • Understanding charge dynamics is crucial for optimizing EHD pump performance.

Conclusions:

  • Electrohydrodynamic pumps are a promising technology for soft fluidic systems.
  • Further research is needed to address existing challenges and unlock full potential.
  • EHD pumps are poised for broader integration into advanced technological applications.