A finite volume method for ferrohydrodynamic problems coupled with microscopic magnetization dynamics

Yang, Wenming

doi:10.1016/j.amc.2022.127704

Cited by 4 publications

(3 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the numerical simulations, the SIMPLEC algorithm [32] for pressure-velocity coupling was selected, and the finite volume method [33,34] was adopted.…”

Section: Numerical Calculation Methodsmentioning

confidence: 99%

Effects of Abrupt Cross-Section Area Change on theMultiparameter Propagation Characteristics of Premixed Methane–Air Explosion in Pipes

et al. 2023

View full text Add to dashboard Cite

This paper explores the effects of an abrupt cross-section area change of gas pipes on the propagation law of explosion. For this, an explosion pipe experimental system was established, and a numerical research was conducted. By experimental and numerical simulation, the evolution of the overpressure, temperature, vorticity, and kinetic energy of shock waves of gas explosion in abrupt pipelines was investigated. This allowed us to obtain expressions for the attenuation coefficient, increase coefficient, and reflection coefficient of gas explosion overpressure. The study indicates that an abrupt increase of the pipeline cross-section area leads to a decrease of shock wave overpressure and vice versa. For a given change of cross-section area, the attenuation coefficient gradually increases as the initial peak overpressure rises, whereas the increase coefficient and reflection coefficient both present a decreasing trend. An abrupt change in the pipe structure can inhibit the propagation of gas explosion flames. The explosive gas is affected by the turbulence effect after passing through the middle large-diameter pipe, and the vorticity curve exhibits a clear peak. In addition, the large eddy motion caused by strong confinement increases the kinetic energy of the gas in pipes. The above research outcomes contribute to further enriching the basic theory of gas explosion for the study of gas explosion propagation in mining laneway.

show abstract

“…In the numerical simulations, the SIMPLEC algorithm [32] for pressure-velocity coupling was selected, and the finite volume method [33,34] was adopted.…”

Section: Numerical Calculation Methodsmentioning

confidence: 99%

Effects of Abrupt Cross-Section Area Change on theMultiparameter Propagation Characteristics of Premixed Methane–Air Explosion in Pipes

et al. 2023

View full text Add to dashboard Cite

show abstract

“…where S 1 represents the piston working area, F c represents the Coulomb friction force [23], f v represents the viscous friction coefficient, k dam is the damping factor and .…”

Section: Numerical Hydraulic Pto System Simulationmentioning

confidence: 99%

Experimental and CFD Assessment of Harmonic Characteristics of Point-Absorber Wave-Energy Converters with Nonlinear Power Take-Off System

Yi,

Sun,

Liu

et al. 2023

JMSE

View full text Add to dashboard Cite

The wave-energy excitation of point absorbers is highly associated with their resonant movement, and harmonic characteristics are of increasing concern in affecting resonance. However, the commonly used linearized power take-off (PTO) systems underestimate the impact of harmonics. The purpose of this study is to address the knowledge gap in assessing the contribution of hydraulic PTO systems to higher harmonic wave loads and velocities. In the present work, higher harmonics in point-absorber wave-energy converters (PA-WECs) with hydraulic power take-off (PTO) systems are investigated through both experimental and computational fluid dynamics (CFD) methods. The fast Fourier transform is used to decompose the high-order harmonics. To account for the influence of nonlinear wave–wave interaction on harmonics, the isolated PA-WEC is used as a basis for comparison with the paired PA-WECs. The influence of wave steepness is also estimated at two resonance periods. Results indicate that the additional resonance of the paired PA-WECs may be attributed to the harmonic wave loads at longer wave periods. Harmonic wave loads of paired PA-WECs typically have a more substantial impact and increase more rapidly with increasing wave steepness compared to isolated PA-WECs. Furthermore, as the wave steepness increases, there are significant enhancements in both the harmonic wave loads and heaving velocity, which strongly correlate with the instantaneous maximum hydraulic power. Consequently, our study will contribute to enhancing the maximum power output in the design of future point absorber arrays.

show abstract

“…Based on the fully implicit finite volume method with the second order of accuracy, the Shliomis equations have been discretized in ref. [36], where numerical examples are given to test the ferrohydrodynamics problem. In addition, both the semi‐discrete and fully discrete finite element schemes have been designed for solving the regularized Shliomis equations by Wu and Xie [37].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of the ferrohydrodynamics flow using an unconditionally stable second‐order scheme

Keram,

Huang

2024

Z Angew Math Mech

View full text Add to dashboard Cite

In this paper, we design a decoupled, linear, unconditionally stable and fully discrete numerical scheme for a ferrohydrodynamics system with second‐order temporal accuracy. This scheme is based on a second‐order backward difference formula for time derivative terms and linearization extrapolation for nonlinear terms, which produces a series of decoupled linear equations and solves effectively this nonlinear and multiphysical coupled system. Meanwhile, we show that the scheme is unconditionally stable. Finally, some numerical experiments are provided to verify the theoretical finding and illustrate the accuracy and efficiency of the proposed scheme.

show abstract

A finite volume method for ferrohydrodynamic problems coupled with microscopic magnetization dynamics

Cited by 4 publications

References 28 publications

Effects of Abrupt Cross-Section Area Change on theMultiparameter Propagation Characteristics of Premixed Methane–Air Explosion in Pipes

Effects of Abrupt Cross-Section Area Change on theMultiparameter Propagation Characteristics of Premixed Methane–Air Explosion in Pipes

Experimental and CFD Assessment of Harmonic Characteristics of Point-Absorber Wave-Energy Converters with Nonlinear Power Take-Off System

Numerical simulation of the ferrohydrodynamics flow using an unconditionally stable second‐order scheme

Contact Info

Product

Resources

About