Numerical Modeling of Heat and Moisture Transfer During Microwave Drying of Wood Above FSP (Part I: the Model)

机译：FSP以上木材的微波干燥过程中热湿传递的数值模型（第一部分：模型）

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This study proposes a numerical model of heat and moisture transfer based on volume averaging theory according to the internal heat and moisture transfer phenomena and different transfer mechanisms above the fiber saturation point (FSP). The model takes into account the process of phase change and assumes that the driving forces of free water and water vapor are the different pressure gradients.

机译：本研究根据内部的热量和水分传递现象以及纤维饱和点（FSP）以上的不同传递机理，基于体积平均理论，提出了一个热量和水分传递的数值模型。该模型考虑了相变过程，并假设自由水和水蒸气的驱动力是不同的压力梯度。

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《International conference on physical and numerical simulation of material processing;ICPNS2010》|2012年|p.523-528|共6页
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Jianfang Yu; Ximing Wang; Yinan Hao;
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中图分类工程材料一般性问题;
关键词
wood; microwave drying; heat and moisture transfer; volume averaging theory;

机译：木;微波干燥;热量和水分传递;体积平均理论;

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1. Numerical Modeling of Heat and Moisture Transfer During Microwave Drying of Wood Above FSP (Part I: the Model) [J] . Jianfang Yu, Ximing Wang, Yinan Hao Materials science forum . 2012,第PTa1期

机译：FSP以上木材的微波干燥过程中热湿传递的数值模型（第一部分：模型）
2. MODELING OF HEAT AND MOISTURE TRANSFER IN WOOD IN FINISH DRYING BY THE ENERGY OF A MICROWAVE FIELD [J] . N. N. Grinchik, A. L. Adamovich, O. A. Kizina, Journal of engineering physics and thermophysics . 2015,第1期

机译：微波场能量模拟木材干燥过程中的湿热传递。
3. Numerical modeling of heat and mass transfer in porous medium during combined hot air, infrared and microwaves drying [J] . P. Salagnac, P. Glouannec, D. Lecharpentier International Journal of Heat and Mass Transfer . 2004,第19a20期

机译：热风，红外和微波联合干燥过程中多孔介质传热和传质的数值模型
4. Numerical Modeling of Heat and Moisture Transfer During Microwave Drying of Wood Above FSP (Part I: the Model) [C] . Jianfang Yu, Ximing Wang, Yinan Hao ICPNS2010 . 2012

机译：木材微波干燥过程中热水输血的数值模拟（第I部分：模型）
5. SIMULTANEOUS HEAT AND MASS TRANSFER MODELING FOR SMALL WOOD PARTICLE DRYING [D] . DORRI, BIZHAN 1983

机译：小木材颗粒干燥的同时传热传质模型
6. Numerical 3D modeling of heat transfer in human tissues for microwave radiometry monitoring of brown fat metabolism [O] . Dario B. Rodrigues, Paolo F. Maccarini, Sara Salahi, -1

机译：棕色脂肪代谢微波辐射测定人体组织中传热的数值3D建模
7. This article presents a new numerical model describing the behaviour of a thermally thick wood sample exposed to high solar heat flux (above 1 MW/m2). A preliminary study based on dimensionless numbers is used to classify the problem and support model building assumptions. Then, a model based on mass, momentum and energy balance equations is proposed. These equations are coupled with liquid-vapour drying model and pseudo species biomass degradation model. By comparing to a former experimental study, preliminary results have shown that these equations are not enough to accurately predict biomass behaviour under high solar heat flux. Indeed, a char layer acting as radiative shield forms on the sample exposed surface. In addition to this classical set of equations, it is mandatory to take into account radiation penetration into the medium. Furthermore, as biomass contains water, medium deformation consecutively to char steam gasification must also be implemented. Finally, with the addition of these two strategies, the model is able to properly capture the degradation of biomass when exposed to high radiative heat flux over a range of sample initial moisture content. Additional insights of biomass behaviour under high solar heat flux were also derived. Drying, pyrolysis and gasification fronts are present at the same time inside of the sample. The coexistence of these three thermochemical fronts leads to char gasification by the steam produced from drying of the sample, which it is the main phenomenon behind medium ablation. [O] . Pozzobon, Victor, Salvador, Sylvain, Bézian, Jean Jacques 2018

机译：本文提供了一个新的数值模型，该模型描述了暴露于高太阳热通量（高于1 / MW / m2）的热厚木材样品的行为。基于无量纲数的初步研究用于对问题进行分类并支持模型构建假设。然后，提出了一种基于质量，动量和能量平衡方程的模型。这些方程式与液体蒸汽干燥模型和假物种生物质降解模型耦合。通过与以前的实验研究进行比较，初步结果表明，这些方程不足以准确预测高太阳热通量下的生物量行为。的确，在样品暴露的表面上形成了充当辐射屏蔽层的炭层。除了这套经典的方程式之外，还必须考虑到辐射向介质的渗透。此外，由于生物质中含有水，因此还必须在炭蒸气汽化后进行连续的介质变形。最后，通过添加这两种策略，该模型能够在一定范围的样品初始水分含量下暴露于高辐射热通量的情况下，正确捕获生物质的降解。还得出了在高太阳热通量下生物量行为的其他见解。样品内部同时存在干燥，热解和气化前沿。这三个热化学前沿的共存会导致样品干燥产生的蒸汽产生焦炭气化，这是介质烧蚀的主要现象。
8. High-intensity drying process: Impulse drying. Progress report on modeling of fluid flow and heat transfer in a crown compensated impulse drying roll: The heat transfer problem [R] . Orloff, D. , Hojjatie, B. , Bloom, F. 1995

机译：高强度干燥过程：脉冲干燥。冠顶补偿脉冲干燥辊内流体流动与传热模型的进展报告：传热问题

Numerical Modeling of Heat and Moisture Transfer During Microwave Drying of Wood Above FSP (Part I: the Model)

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