Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

NMR experiments on a three-dimensional vibrofluidized granular medium.

Chao Huan1, Xiaoyu Yang, D Candela

  • 1Physics Department, University of Massachusetts, Amherst, Massachusetts 01003, USA.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|June 1, 2004
PubMed
Summary

This study used NMR to measure density and temperature in vibrated granular systems. Results show deviations from standard statistics, especially near the bottom, and a temperature inversion at the surface.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Preparation of a composite dust suppressant and investigation of its toxicity to lung tissue in C57BL/6 mice.

Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering·2026
Same author

Mathematical modeling of multi-component aerosol droplet evaporation and growth in indoor environments.

Journal of hazardous materials·2024
Same author

Complex Memory Formation in Frictional Granular Media.

Physical review letters·2023
Same author

Giant Spin Splitting in Chiral Perovskites Based on Local Electrical Field Engineering.

The journal of physical chemistry letters·2021
Same author

Soil Nutrient Estimation and Mapping in Farmland Based on UAV Imaging Spectrometry.

Sensors (Basel, Switzerland)·2021
Same author

The development of lived experience-centered word clouds to support research uncertainty gathering in degenerative cervical myelopathy: results from an engagement process and protocol for their evaluation, via a nested randomized controlled trial.

Trials·2021

Area of Science:

  • Physics
  • Chemical Engineering
  • Materials Science

Background:

  • Understanding granular flow dynamics is crucial for industrial processes.
  • Vibrational fluidization offers a method to control granular material behavior.
  • Characterizing granular fluid properties requires advanced measurement techniques.

Purpose of the Study:

  • To investigate the behavior of a three-dimensional granular system fluidized by vertical vibrations.
  • To directly measure density, temperature, and velocity distributions within the granular fluid.
  • To compare experimental data with hydrodynamic theory predictions.

Main Methods:

  • Utilized pulsed field gradient nuclear magnetic resonance (PFG-NMR) and one-dimensional magnetic resonance imaging (1D-MRI).

Related Experiment Videos

  • Studied a system of mustard seeds fluidized by vertical container vibrations at 50 Hz.
  • Analyzed data for low layer numbers (N(l) ≤ 4) and dimensionless accelerations (Γ = 15, 18).

    • Main Results:

    • Directly measured vertical profiles of density and granular temperature.
    • Observed velocity distributions with modest deviations from Maxwell-Boltzmann statistics.
    • Found a highly skewed, non-Gaussian vertical velocity distribution near the sample bottom.
    • Successfully modeled density and temperature profiles away from the container bottom using hydrodynamic theory.
    • Observed a temperature inversion near the free upper surface, consistent with inelastic system predictions.

    Conclusions:

    • Hydrodynamic theory effectively models granular fluid behavior away from boundaries.
    • Deviations from Maxwell-Boltzmann statistics highlight complex granular dynamics.
    • The temperature inversion at the surface is a key characteristic of inelastic granular systems.