Related Experiment Video
Updated: Jun 23, 2025
08:04
Controlling Flow Speeds of Microtubule-Based 3D Active Fluids Using Temperature
Published on: November 26, 2019
7.2K
Spontaneous stable rotation of flocking flexible active matter
Gaoxiao Jiang1, Zhihong You1,2, Rui Ma1,2
1Department of Physics, College of Physical Science and Technology, Xiamen University, Xiamen 361005, China. ruima@xmu.edu.cn.
Soft Matter
|June 18, 2024
Summary
This study introduces a flexible active matter model showing that increased direction detectability in flocking agents leads to stable, synchronized cluster rotation. This finding explains collective rotational motion in systems like worms or dogs flocking towards a source.
Area of Science:
- Physics
- Complex Systems
- Biophysics
Background:
- Collective motion in nature, such as flocking, is a fundamental phenomenon.
- Active matter systems exhibit emergent behaviors from self-propelled individual units.
- Understanding the dynamics of flocking agents is crucial for various scientific fields.
Purpose of the Study:
- To investigate the collective motion of achiral agents in a flexible active matter model.
- To explore the emergence of stable cluster rotation based on direction detectability.
- To establish a relationship between agent detectability, flock chirality, and rotational motion.
Main Methods:
- Developed an n-node flexible active matter model for agents on a 2D surface.
- Introduced a measure of direction detectability to guide agents towards a food source.
- Employed analytical derivations and numerical simulations to analyze emergent behaviors.
Main Results:
- Spontaneous stable cluster rotation emerges with increasing direction detectability.
- The rotation is synchronized with chirality induced by agent alignment and active forces.
- A linear relationship was observed between normalized angular velocity and chirality.
Conclusions:
- The model successfully explains spontaneous stable cluster rotation in flexible active matter systems.
- Findings are applicable to real-world examples like worms or dogs flocking to a single source.
- Direction detectability is a key factor driving synchronized rotational flocking behavior.
Related Concept Videos
01:24Absolute Motion Analysis- General Plane Motion
219
Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
219
01:17Steady, Laminar Flow Between Parallel Plates
172
Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
172
01:26Rotational Motion about a Fixed Axis
461
A rigid body's rotation around a fixed axis makes every point within it trace a circular path around a specific line or point. The term given to this type of spinning is defined by the angular position, symbolized by the angle θ. This angle is gauged from a static reference line to the revolving object. From this angular position, any variation is referred to as angular displacement, denoted by dθ. The extent of this displacement can be calculated in degrees, radians, or...
461
01:28Irrotational Flow
443
Irrotational flow is characterized by fluid motion where particles do not rotate around their axes, resulting in zero vorticity. For a flow to be irrotational, the curl of the velocity field must be zero. This imposes specific conditions on velocity gradients. For instance, to maintain zero rotation about the z-axis, the gradient condition:
443
01:22Planar Rigid-Body Motion
430
Understanding the movement of a rigid body in planar motion involves recognizing that every particle within this body is traversing a path that maintains a consistent distance from a specific plane. This concept is fundamental in the study of physics and mechanical engineering, and it allows us to comprehend better how objects move in space.
Planar motion is typically divided into three distinct categories. The first is rectilinear translation, demonstrated by a subway train that moves along...
Planar motion is typically divided into three distinct categories. The first is rectilinear translation, demonstrated by a subway train that moves along...
430
01:11Rotation of Asymmetric Top
886
By definition, a spherically symmetric body has the same moment of inertia about any axis passing through its center of mass. This situation changes if there is no spherical symmetry. Since most rigid bodies are not spherically symmetric, these require special treatment.
The relationship between the angular momentum of any rigid body and its angular velocity, both of which are vectors, involves the moment of inertia. The moment of inertia is a scalar quantity only for spherically symmetric...
The relationship between the angular momentum of any rigid body and its angular velocity, both of which are vectors, involves the moment of inertia. The moment of inertia is a scalar quantity only for spherically symmetric...
886