Magnetofluid raster simulated based on nonspherical molecular dynamics and simulation method thereof

Abstract

Provided are a magnetofluid raster simulated based on nonspherical molecular dynamics and a simulation method thereof which belong to the technical field of computer-aided molecular simulation. The method comprises the following steps: 1) establishing a magnetofluid system model on software; 2) calculating force and moment of every two magnetic particles within the action radius; 4) calculating speed and angular velocity of particles according to force and moment of magnetic particles; 4) calculating positions and directions of the magnetic particles after a period of time. According to a nonspherical molecular dynamics method, the number of magnetic particles is calculated only by volume fraction so that a magnetofluid system model is set up. Additionally, a magnetofluid raster physics model is precisely acquired under the environment of a magnetic field. Translational motion and rotation of magnetic particles are well represented by adoption of a stress function and a torque functionso that positions of the magnetic particles are accurately predicted.

Description

technical field [0001] The invention belongs to the technical field of computer molecular simulation, and in particular relates to a magnetofluid grating simulated based on non-spherical molecular dynamics and a simulation method. Background technique [0002] Magnetic fluid is a new type of functional material. The study of its microstructure is an important issue in the basic theory of magnetic fluid, which has guiding significance for further research on optical sensing properties. The traditional theories to study the formation mechanism of MHF microstructure mainly include molecular dynamics, Monte Carlo method, dissipative particle dynamics and discrete lattice Boltzmann method. Although these traditional methods can simulate the process of simple chain formation of magnetic particles in ferrofluid under the action of a magnetic field, they cannot further reflect the process of flux chain aggregation and the way the flux chains are arranged. Since most of the literatu...

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Problems solved by technology

Although these traditional methods can simulate the process of simple chain formation of magnetic particles in ferrofluid under the action of a magnetic field, they cannot further reflect the process of magnetic chain aggregation and the way the magnetic chain is arranged.

Since most of the literature selects spherical particles as the analysis object, however, in the calculation of spherical particles, only the effect of the translational motion of the particles can be reflected

In practice, the magnetic particles in the magnetic fluid have both translation and rotation during the motion process, and spherical particles cannot effectively consider the influence of the rotation process

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