Circulations of some wood products are identified as one of the causes that have facilitated the introduction of pathogens and insects in several countries of the world. This biological invasion has caused the destruction of plant species, causing significant economic and ecological losses for many regions of the world. To this end, the World Trade Organization (WTO) has established, through the International Plant Protection Convention (IPPC), the “ISPM 15” standard on the use of microwaves for phytosanitary treatment. The goal of this work is to quantify numerically the minimum time required for the phytosanitary treatment of three Eastern Canadian wood species, trembling aspen (Populus tremuloides Michx.), white birch (Betula papyrifera) and sugar maple (Acer saccharum). The nonlinear heat conduction problem is solved using three-dimensional volumetric specific enthalpy based on finite element analysis. The incident microwaves are supposed plane wave. The dielectric and thermophysical properties are a function of temperature, moisture content and structural orientation. It is worth noting that these investigations were performed at the frequency of 2466 MHz, temperatures from − 20 to 60 °C, and moisture content of 131%. This study focused on a sample cube of wood 22 mm thick and a pallet (100 mm × 50 mm × 22 mm).

中文翻译：

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微波对木材进行植物检疫处理的3D有限元焓方法

一些木材产品的流通被确定为促进在世界上几个国家引入病原体和昆虫的原因之一。这种生物入侵已造成植物物种的破坏，对世界许多地区造成重大的经济和生态损失。为此，世界贸易组织（WTO）通过国际植物保护公约（IPPC）建立了关于使用微波进行植物检疫处理的“ ISPM 15”标准。这项工作的目标是从数量上量化对三种加拿大东部木材，颤抖的白杨（白杨（Populus tremuloides Michx。），白桦（Betula papyrifera）和糖枫（Acer saccharum）进行植物检疫处理所需的最短时间。）。基于有限元分析的三维体积比焓法解决了非线性导热问题。入射的微波被认为是平面波。介电和热物理性质是温度，水分含量和结构取向的函数。值得注意的是，这些研究是在2466 MHz的频率，-20至60°C的温度和131％的水分含量下进行的。这项研究的重点是一块22毫米厚的木头立方体和一个托盘（100毫米×50毫米×22毫米）。