Abstract We pursued a quantitative comparison of the continuum and mesoscale simulations of metal particle reactions in a condensed explosive. The continuum or homogeneous approximation assumed a single combustible mixture; contrastingly, in the present heterogeneous treatment of a mixture, aluminum and 1,3,5,7-tetranitro-1,3,5,7-tetrazocane were considered independent reactive granules of micron size with binder being inert material with strength. Both simulations similarly estimated the steady detonation velocity and peak pressure, while the early flame acceleration transients, marked by a complex flow structure behind the flame front, were observed only in the mesoscale simulation. The precise multi-interface processing techniques, combined with granule-level reactive flow models developed in this study, are deemed applicable to general heterogeneous solid fuel combustion studies related to granules of various size, shape, and reactivity.

中文翻译：

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异质高能固体燃料冲击引起的爆炸瞬态的多尺度建模

摘要 我们对浓缩炸药中金属粒子反应的连续介质和中尺度模拟进行了定量比较。连续体或均质近似假设为单一的可燃混合物；相比之下，在目前混合物的非均相处理中，铝和 1,3,5,7-四硝基-1,3,5,7-四氮杂烷被认为是微米尺寸的独立反应性颗粒，粘合剂是具有强度的惰性材料。两种模拟都类似地估计了稳定的爆轰速度和峰值压力，而早期的火焰加速瞬变，以火焰前沿后面的复杂流动结构为标志，仅在中尺度模拟中观察到。精确的多界面处理技术，结合本研究开发的颗粒级反应流模型，