The oxygen supply enhancement in a porous compost by permanent magnets have been investigated numerically. The computations were conducted for the cases of neodymium magnet. The magnets were aligned vertically with specified interval in the compost. Darcy model was applied to represent the air flow through the compost and the oxygen concentration was solved by SIMPLE based algorithm, coupled with the fermentation process that occurs in the compost. The following five effects on the oxygen supply enhancement in the compost: 1 .permeability through the compost, 2.rate constant of the exothermic reaction in the fermentation process, 3.size of the compost, 4.interval of the magnets and 5.location of the magnets were investigated. As a result, the maximum inlet air velocity reaches 6.4 mm/s when the air permeability is 3.82x10" 4 m~2. The permanent magnets enhance the air flow and oxygen supply.
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机译：已经对通过永磁体提高多孔堆肥中的氧气供应进行了数值研究。针对钕磁铁的情况进行了计算。磁铁在堆肥中以指定的间隔垂直对齐。应用达西模型表示通过堆肥的空气流量，并通过基于SIMPLE的算法解决氧浓度，并结合堆肥中发生的发酵过程进行求解。以下五个对堆肥中氧气供应增强的影响：1.通过堆肥的渗透性; 2.发酵过程中放热反应的速率常数; 3.堆肥的大小; 4.磁铁的间隔;以及5.位置对磁铁进行了调查。结果，当透气度为3.82x10“ 4 m〜2时，最大进气速度达到6.4 mm / s。永磁体增强了空气流动和氧气供应。
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