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Related Concept Videos

Pumped Concrete01:13

Pumped Concrete

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Concrete in large quantities can be pumped across long distances for placing in inaccessible sites. This system comprises a hopper that receives concrete from a mixer, a pump to propel the concrete, and pipelines that facilitate its delivery.
For direct-acting pumps, the concrete enters the pump via the inlet valve under the action of gravity and suction created by the movement of the piston. This concrete is then forced into the pipeline and out through the outlet valve by the forward movement...
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Vibrating Concrete01:19

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Mechanical vibrators are instrumental in compacting newly poured concrete within formwork and around reinforcements. This process is essential to eliminate trapped air pockets and establish a dense concrete mass. One widely used method is vibrating by internal vibrators, often referred to as a poker vibrator or immersion vibrator. It is rapidly inserted through the full depth of the freshly laid concrete and slightly extends into the layer below it (which remains in a plastic state). Consistent...
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A System to Create Stable Nanoparticle Aerosols from Nanopowders
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Granular vibration pumping system for handling and characterizing particulate materials.

Masato Adachi1, Kenta Shirode1, Shuntaro Yamato1

  • 1Department of Mechanical Engineering and Science, Kyoto University, Katsura C3, Nishikyo-ku, Kyoto 615-8540, Japan.

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|May 1, 2024
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Summary

A new granular vibration pumping system simplifies installation and research. This adaptable setup enhances understanding of granular physics and particle motion dynamics.

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Area of Science:

  • Physics
  • Engineering

Background:

  • Granular vibration pumping systems lift materials using oscillating pipes.
  • The underlying climbing mechanisms and granular physics require further clarification.

Purpose of the Study:

  • To develop a unique, adaptable granular vibration pumping system for research.
  • To improve the understanding of granular physics and particle dynamics.

Main Methods:

  • Employed an eccentric cam mechanism for excitation and a dust-tolerant linear system.
  • Integrated a recording and imaging system for detailed particle motion observation.
  • Designed a compact, modular system for flexible experimental setups.

Main Results:

  • Achieved reproducible climbing motions of glass beads via sinusoidal pipe vibrations.
  • Demonstrated the system's adaptability for various granular materials and sample cells.
  • Enabled detailed observation of particle behavior within pipes and sample cells.

Conclusions:

  • The developed system offers a simple, compact, and adaptable platform for granular physics research.
  • Facilitates precise parameter tuning and enhances the study of granular material transport.
  • Provides new avenues for investigating particle dynamics and improving granular handling processes.