Related Experiment Video
Updated: Sep 1, 2025
11:51
Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
Published on: February 22, 2018
8.8K
Drag on a circular intruder traversing a shape-heterogeneous granular mixture
Bitang Kwrung Tripura1, Sonu Kumar1, Vamsi Krishna Reddy Anyam1
1Department of Chemical Engineering, Indian Institute of Technology, Guwahati 781039, Assam, India.
Physical Review. E
|August 17, 2022
Summary
Particle shape significantly impacts intruder drag in granular mixtures. Frictionless conditions reduce these shape-dependent force chain effects, altering dynamics.
Area of Science:
- Granular physics
- Soft matter physics
- Complex systems
Background:
- Understanding granular mixture dynamics is crucial for various industrial processes.
- Particle shape heterogeneity is a key factor influencing macroscopic behavior.
- Previous studies often simplify particle shapes, neglecting real-world complexities.
Purpose of the Study:
- To investigate the influence of particle shape heterogeneity on intruder dynamics in 2D granular mixtures.
- To analyze the role of force chains in stress propagation from an intruder.
- To examine the effects of varying mixture concentration, friction, area fraction, and intruder size.
Main Methods:
- Simulations of a 2D granular system composed of dumbbells and disks.
- Controlled variation of dumbbell-disk mixture concentration and friction coefficients.
- Analysis of intruder drag force, force chains, velocity, and stress fields.
Main Results:
- Significant differences in intruder drag were observed with varying mixture concentrations, attributed to particle shape.
- Force chain structures varied notably with grain shape, but were suppressed in frictionless systems.
- Increased area fraction led to higher drag forces due to enhanced contact forces.
Conclusions:
- Particle shape heterogeneity plays a critical role in granular intruder dynamics, affecting drag forces and stress propagation.
- Friction is essential for the development and influence of shape-dependent force chains.
- System parameters like area fraction and intruder size also modulate the observed phenomena.
More Related Videos
11:03An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
8.6K
09:00Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
Published on: September 29, 2019
13.5K
Related Concept Videos
01:16Precipitate Formation and Particle Size Control
926
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...
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...
926
01:25Shape and Texture of Coarse Aggregate
265
Aggregate shape is classified based on the relative sharpness or roundness of the edges and corners. This classification includes categories like rounded, angular, elongated, and flaky, each with specific characteristics. Rounded aggregates, fully shaped by attrition, are typical of river or seashore gravel, while angular aggregates, such as crushed rock, have well-defined edges. Aggregates that are elongated and flaky are less desirable, as they can reduce the workability and strength of...
265
01:24Newton's Law of Gravitational Attraction
660
Sir Isaac Newton established the universality of the law of gravitational attraction based on empirical evidence and inductive reasoning. He published his work in Philosophiae Naturalis Principia Mathematica ("the Principia") on July 5, 1687.
Newton's law of gravitational attraction is a fundamental law of physics that governs the attraction between objects. It states that the magnitude of the gravitational force between any two objects is proportional to their masses and inversely...
Newton's law of gravitational attraction is a fundamental law of physics that governs the attraction between objects. It states that the magnitude of the gravitational force between any two objects is proportional to their masses and inversely...
660
01:10First Law: Particles in One-dimensional Equilibrium
7.0K
Newton's first law of motion states that a body at rest remains at rest, or if in motion, remains in motion at constant velocity, unless acted on by a net external force. It also states that there must be a cause for any change in velocity (a change in either magnitude or direction) to occur. This cause is a net external force. For example, consider what happens to an object sliding along a rough horizontal surface. The object quickly grinds to a halt, due to the net force of friction. If...
7.0K
01:18First Law: Particles in Two-dimensional Equilibrium
5.2K
Recall that a particle in equilibrium is one for which the external forces are balanced. Static equilibrium involves objects at rest, and dynamic equilibrium involves objects in motion without acceleration; but it is important to remember that these conditions are relative. For instance, an object may be at rest when viewed from one frame of reference, but that same object would appear to be in motion when viewed by someone moving at a constant velocity.
Newton's first law tells us about...
Newton's first law tells us about...
5.2K
01:09Rolling Without Slipping
4.1K
People have observed the rolling motion without slipping ever since the invention of the wheel. For example, one can look at the interaction between a car's tires and the surface of the road. If the driver presses the accelerator to the floor so that the tires spin without the car moving forward, there must be kinetic friction between the wheels and the road's surface. If the driver slowly presses the accelerator, causing the car to move forward, the tires roll without slipping. It is...
4.1K