In the present study, direct numerical simulations for smoldering in simplified geometries are performed for multicomponent and dilatable flows. The reactant gas is passing inside an array of permeable and microporous cylinders. The chemical reaction takes place within the grains. For the sake of simplicity, the smoldering is treated as a single step chemical reaction. We define a Darcy-Brinkman model to deal with the multi-scale nature of this problem. Varying the flow rate, and carbon content, we can investigate the response of our model, and try to compare with existing solutions or available experimental investigations. Thus, the ability of the Darcy Brinkman approach to capture such situations of porous particles combustion will be checked. The numerical model sensitivity to the inner grain permeability is also investigated.

在本研究中，对多组分流动和可膨胀流动进行了简化几何形状中的阴燃的直接数值模拟。反应气体在一系列可渗透的微孔圆柱体内通过。化学反应在晶粒内发生。为了简单起见，将阴燃视为一步化学反应。我们定义了Darcy-Brinkman模型来处理此问题的多尺度性质。通过改变流速和碳含量，我们可以研究模型的响应，并尝试与现有解决方案或可用的实验研究进行比较。因此，将检查Darcy Brinkman方法捕获此类多孔粒子燃烧情况的能力。还研究了数值模型对内部晶粒渗透率的敏感性。