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首页> 外文期刊>Journal of Computational Physics >Finite difference time domain algorithm for electromagnetic problems involving material movement
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Finite difference time domain algorithm for electromagnetic problems involving material movement

机译:涉及材料运动的电磁问题的时域有限差分算法

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摘要

The finite difference time domain (FDTD) method, adapted for magnetic field diffusion problems, is used to study the electromagnetic induction in moving materials by including motional emf in standard FDTD electromagnetic equations. The material movement is implemented by continuously changing material properties in each computational cell consistent to material advection. The flux corrected transport (FCT) algorithm is used to transport magnetic field in a fixed eulerian cell. A higher time-step is achieved by artificially increasing permittivity of the medium. This new approach is validated with standard analytical solutions for planar magnetic flux compression system and magnetic field diffusion in moving conductors with a non-relativistic velocity. To our knowledge, this is the first approach to use FDTD method for electromagnetic problems involving material motion. (c) 2008 Elsevier Inc. All rights reserved.
机译:通过将运动电动势包含在标准FDTD电磁方程中,适用于磁场扩散问题的有限差分时域(FDTD)方法用于研究运动材料中的电磁感应。物料移动是通过连续更改每个计算单元中与物料对流一致的物料属性来实现的。通量校正传输(FCT)算法用于在固定的欧拉单元中传输磁场。通过人为增加介质的介电常数可以实现更高的时间步长。此新方法已通过用于平面磁通量压缩系统和非相对论速度的运动导体中磁场扩散的标准分析解决方案进行了验证。据我们所知,这是将FDTD方法用于涉及物质运动的电磁问题的第一种方法。 (c)2008 Elsevier Inc.保留所有权利。

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