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 Concept Videos

Factors Affecting Dissolution: Particle Size and Effective Surface Area01:23

Factors Affecting Dissolution: Particle Size and Effective Surface Area

Dissolution kinetics, an essential aspect of oral drug delivery, is significantly influenced by the drug's particle size. According to the Noyes-Whitney dissolution model, the dissolution rate correlates directly with the drug's surface area. The larger the surface area, the higher the drug's solubility in water, leading to a faster drug dissolution rate. Reducing particle size increases the effective surface area, enhancing the dissolution process. Micronization and nanosizing are employed to...
Characteristics of Fluids01:20

Characteristics of Fluids

When a force is applied parallel to the top surface of a solid, it resists the applied force due to the internal frictional forces between the layers of the solid known as shearing resistance. However, when the force is removed, the shearing forces restore the original shape of the solid. Other deformation forces also cause temporary changes in shape if the forces are not beyond a threshold magnitude. Solids tend to retain their shape, making the study of their rest and motion easier. Beyond...
Characteristics of Fluids01:31

Characteristics of Fluids

Fluids differ from solids primarily in their molecular structure and stress response. Solids have tightly packed molecules with strong intermolecular forces, maintaining their shape and resisting deformation. In contrast, fluids have molecules spaced farther apart with weaker forces, allowing them to flow and deform easily.
Fluids, which include both liquids and gases, are substances that deform continuously under shearing stress. For example, water and oil are liquids with molecules that can...
Typical Model Studies01:30

Typical Model Studies

Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
Precipitate Formation and Particle Size Control01:16

Precipitate Formation and Particle Size Control

In precipitation gravimetry, the precipitating agent should react specifically or selectively with the analyte. While a specific reagent reacts with the analyte alone, a selective reagent can react with a limited number of chemical species.
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
Factors Affecting Solubility04:01

Factors Affecting Solubility

Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:

You might also read

Related Articles

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

Sort by
Same author

Fluidization Induced by Magnetic Interactions in Confined Active Matter.

Physical review. E·2026
Same author

Cooling Mechanism Controls Motility-Induced Phase Separation in Inertial Active Liquids.

Physical review letters·2026
Same author

Local entropy production rate of run-and-tumble particles.

Physical review. E·2025
Same author

Entropy Production and Irreversibility in the Linearized Stochastic Amari Neural Model.

Entropy (Basel, Switzerland)·2025
Same author

Bridge, Reverse Bridge, and Their Control.

Entropy (Basel, Switzerland)·2025
Same author

Active-like dynamics of worm-like chains driven by an external traveling-wave force.

Soft matter·2025
Same journal

Anharmonic phonons via quantum thermal bath simulations.

The Journal of chemical physics·2026
Same journal

Quantum simulation of alignment dependent differential cross sections in co-propagating molecular beams at cold collision energies.

The Journal of chemical physics·2026
Same journal

Non-additive ion effects on the coil-globule equilibrium of a generic polymer in aqueous salt solutions.

The Journal of chemical physics·2026
Same journal

Insights into the unexpected small reduction of the temperature of maximum density of water by lithium chloride addition.

The Journal of chemical physics·2026
Same journal

Optical frequency comb double-resonance spectroscopy of the 9030-9175 cm-1 states of ethylene.

The Journal of chemical physics·2026
Same journal

Time reversal breaking of colloidal particles in cells.

The Journal of chemical physics·2026
See all related articles

Related Experiment Video

Updated: May 25, 2026

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
11:03

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

Published on: December 4, 2017

Structure factors in granular experiments with homogeneous fluidization.

Andrea Puglisi1, Andrea Gnoli, Giacomo Gradenigo

  • 1Istituto dei Sistemi Complessi-CNR and Dipartimento di Fisica, Università Sapienza, p.le A. Moro 2, 00185 Rome, Italy. andrea.puglisi@roma1.infn.it

The Journal of Chemical Physics
|January 14, 2012
PubMed
Summary
This summary is machine-generated.

Granular materials in a fluidized state exhibit distinct density and velocity structures. Two temperatures, bath and granular, are identified, with a correlation length dependent on particle packing.

More Related Videos

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
11:51

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

Published on: February 22, 2018

Frugal Imaging Technique of Capillary Flow Through Three-Dimensional Polymeric Printing Powders
06:01

Frugal Imaging Technique of Capillary Flow Through Three-Dimensional Polymeric Printing Powders

Published on: October 4, 2022

Related Experiment Videos

Last Updated: May 25, 2026

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
11:03

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

Published on: December 4, 2017

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
11:51

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

Published on: February 22, 2018

Frugal Imaging Technique of Capillary Flow Through Three-Dimensional Polymeric Printing Powders
06:01

Frugal Imaging Technique of Capillary Flow Through Three-Dimensional Polymeric Printing Powders

Published on: October 4, 2022

Area of Science:

  • Physics
  • Granular Materials Science
  • Non-equilibrium Statistical Mechanics

Background:

  • Fluidized granular systems offer a unique platform to study non-equilibrium phenomena.
  • Understanding particle dynamics and interactions is crucial for characterizing granular flow behavior.

Purpose of the Study:

  • To investigate the velocity and density structure factors in a quasi-2D fluidized granular experiment.
  • To explore the relationship between particle packing fraction and hydrodynamic properties.
  • To compare experimental findings with fluctuating hydrodynamic theories.

Main Methods:

  • Measurements of velocity and density structure factors were performed over a wide range of scales.
  • A horizontal quasi-2D fluidized granular experiment was conducted using vertically vibrated rough plates.
  • Packing fractions (φ) varied from 10% to 40%.

Main Results:

  • Density structure factor resembles elastic hard spheres, with deviations at large scales due to effective interactions.
  • Velocity field reveals a complex structure characteristic of a non-equilibrium steady state.
  • Temporal decay of velocity autocorrelations aligns with linear hydrodynamic equations.
  • Equal-time velocity structure factors show two distinct temperature regimes (bath and granular) separated by a correlation length that increases with packing fraction.

Conclusions:

  • The study reveals distinct density and velocity behaviors in fluidized granular systems.
  • Two temperatures, T(b) and T(g), are identified, with T(g) influenced by particle collisions.
  • A correlation length, dependent on packing fraction and mean free path, separates these thermal regimes.