A new FDTD model of microwave susceptors on curved surfaces

A. Raniszewski, M. Krysicki, A. Wiȩckowski, M. Celuch, V. Yakovlev
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引用次数: 0

Abstract

Susceptors are thin lossy metal layers used to control local dissipation of power during microwave heating processes. While they may have a dominant effect on final temperature patterns, their electromagnetic modeling has been a long recognized challenge, due to small transverse dimensions, microwave semi-transparency, and complicated shapes. This work addresses effective representation of susceptors deposited upon or buried within microwaveable food packages of non-Cartesian geometries. It focuses on packages shaped as cylinders or truncated cones, which are non-trivial to be described on a Cartesian mesh, but more easy to define in a cylindrical system. Borrowing from previous experience with soft and hard antenna surfaces, an idea of simplifying the susceptor structure is proposed. Two specific models are implemented in the FDTD environment and validated. Computational examples prove a significant reduction in RAM and CPU requirements, within a permissible accuracy margin. Conclusions apply to potential use of the new models for microwave heating simulations, but also emphasis synergy effects between various microwave technologies.
一种新的曲面微波敏感器时域有限差分模型
电纳是一种薄的金属损耗层,用于控制微波加热过程中功率的局部耗散。虽然它们可能对最终温度模式有主要影响,但由于横向尺寸小、微波半透明和复杂的形状,它们的电磁建模一直是一个公认的挑战。这项工作解决了在非笛卡尔几何的微波食品包装上沉积或埋在微波食品包装中的有效表征。它侧重于圆柱体或截锥形状的包,这些包在笛卡尔网格上描述是非平凡的,但在圆柱形系统中更容易定义。借鉴以往软、硬天线表面的处理经验,提出了简化电纳结构的思路。在FDTD环境中实现了两个特定的模型并进行了验证。计算实例证明,在允许的精度范围内,RAM和CPU需求显著减少。结论适用于微波加热模拟新模型的潜在用途,但也强调了各种微波技术之间的协同效应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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