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Related Concept Videos

Fluid Pressure01:14

Fluid Pressure

668
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...
668
Types of Fluids01:27

Types of Fluids

368
Fluids can be classified into Newtonian and non-Newtonian fluids based on their response to shear stress. Newtonian fluids have a linear relationship between shear stress and the shear strain rate, following Newton's law of viscosity. Their viscosity remains constant regardless of the shear rate, making their behavior predictable and easier to analyze. Common examples include water, air, oil, and gasoline.
In contrast, non-Newtonian fluids do not follow Newton's law of viscosity, and...
368

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Fiber pumps for wearable fluidic systems.

Michael Smith1, Vito Cacucciolo1,2, Herbert Shea1

  • 1Soft Transducers Laboratory (LMTS), École Polytechnique Fédérale de Lausanne, Neuchâtel, Switzerland.

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Summary
This summary is machine-generated.

Researchers developed silent, stretchable fiber-based fluidic pumps for wearables. These pumps enable integrated textile systems for muscular support, thermoregulation, and haptic feedback without bulky components.

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Area of Science:

  • Textile Engineering
  • Wearable Technology
  • Fluidic Systems

Background:

  • Pressurized fluidic circuits in textiles offer potential for muscular support, thermoregulation, and haptic feedback.
  • Conventional rigid pumps are unsuitable for wearables due to noise and vibration.
  • There is a need for compact, silent, and integrated pressure sources for wearable fluidic applications.

Purpose of the Study:

  • To develop novel fluidic pumps that can be seamlessly integrated into textiles.
  • To enable untethered wearable fluidic systems with enhanced design freedom.
  • To demonstrate the application of these pumps in various wearable technologies.

Main Methods:

  • Fabrication of stretchable fluidic pumps using continuous helical electrodes embedded in elastomer tubing.
  • Utilizing charge-injection electrohydrodynamics for silent pressure generation.
  • Characterization of pump performance, including pressure generation and flow rates.

Main Results:

  • The developed fiber-based pumps generate pressure silently, overcoming limitations of conventional pumps.
  • Each meter of fiber produces 100 kilopascals of pressure with flow rates up to 55 milliliters per minute.
  • Achieved a power density of 15 watts per kilogram, demonstrating efficient operation.
  • Demonstrated applications in wearable haptics, mechanically active fabrics, and thermoregulatory textiles.

Conclusions:

  • Stretchable fiber fluidic pumps represent a significant advancement for untethered wearable fluidics.
  • These pumps offer considerable design freedom for integrating advanced functionalities into textiles.
  • The technology holds promise for next-generation smart textiles with diverse applications.