Comparison of first‐ and second‐order 2D finite element models for calculating AC loss in high temperature superconductor coated conductors
Comparison of first‐ and second‐order 2D finite element models for calculating AC loss in high temperature superconductor coated conductors
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DOI：
10.1108/03321641111101195
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发表时间：
2011-03
影响因子：
0.7
通讯作者：
M. Ainslie;T. Flack;Z. Hong;T. Coombs
中科院分区：
文献类型：
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作者：
M. Ainslie;T. Flack;Z. Hong;T. Coombs
目的-本文的目的是提供一个比较的一阶和二阶二维有限元模型评估的电磁性能和计算交流损耗在高温超导体（HTS）涂层导体。设计/方法/途径-该模型是基于二维（2D）H公式，这是基于直接求解磁场分量在2D。两个模型-一个最小的对称三角形网格和一个单层正方形网格-比较基于不同类型的网格元素：一阶（拉格朗日-线性）和二阶（拉格朗日-二次）网格元素，和edge elements.Findings -网格元素的数量和类型是至关重要的，以获得最低水平的离散化，以实现准确的结果。通过适当增加超导层厚度和选择最小对称三角形网格单元，可以得到足够精确的滞回超临界温度场估计。
Purpose – The purpose of the paper is to provide a comparison of first‐ and second‐order two dimensional finite element models for evaluating the electromagnetic properties and calculating AC loss in high‐temperature superconductor (HTS) coated conductors.Design/methodology/approach – The models are based on the two‐dimensional (2D) H formulation, which is based on directly solving the magnetic field components in 2D. Two models – one with a minimum symmetric triangular mesh and one with a single‐layer square mesh – are compared based on different types of mesh elements: first‐order (Lagrange – linear) and second‐order (Lagrange – quadratic) mesh elements, and edge elements.Findings – The number and type of mesh elements are critically important to obtain the minimum level of discretization to achieve accurate results. Artificially increasing the superconductor layer and choosing a minimum symmetric mesh with triangular edge elements can provide a sufficiently accurate estimation of the hysteretic superco...