"Computational modeling and experimental study of the combustion dynamics and explosive effects of energetic, multiphase systems"

固体推进剂和炸药属于可燃材料，称为含能材料。这些能源被广泛用于安全气囊充气、火箭和拆除等应用。由于这些含能材料在实际应用中的重要性，建立可靠的含能材料模型是非常必要的。对于工程尺度系统，基于非平衡多相混合物理论的Baer-Nunziato BN模型主要用于颗粒含能材料，其推广已应用于非均相固体颗粒流动。然而，精确求解复杂的BN多相方程并进行真实模拟的可能性长期以来一直是一个非常雄心勃勃的目标。近年来，这种多阶段模型经过了密集的分析发展，应用数学和科学计算的新进展为实现准确有效地找到其数值解这一目标提供了良好的机会。 提出了一项为期五年的研究计划，旨在开发一个具有最先进的科学计算策略的计算框架，用于模拟含能系统的可压缩多相流。这将通过计算分析来实现，以开发新的高阶数值方法来获得BN多相模型的准确解，并通过适当定义的多相问题的实验来为额外的物理模型提供验证、经验关联和新的观察结果。这一技术进展将应用于凝聚炸药和固体推进剂燃烧的基础研究，以及非均相气体-颗粒系统中的爆轰动力学。这项研究将提供一种适用于国防、航空航天、汽车和采矿行业的数字技术，所有这些行业对加拿大经济都很重要。基础研究的结果不仅将提供促进对多相燃烧和爆炸的了解的信息，而且还将对改进用于新应用的炸药的配方和表征以及为军事和其他工业环境中的含能材料的安全处理和储存建立标准产生广泛的影响。

Solid propellants and explosives belong to the class of combustible known as energetic materials. These energy resources are extensively used for applications such as airbags inflators, rockets and demolitions. Because of its great importance for practical applications, a reliable model of these energetic materials is highly desirable. For engineering scale systems, the Baer-Nunziato BN model based on non-equilibrium multiphase mixture theory is mostly considered for granular energetic materials, and its generalization has been applied for heterogeneous solid-particle flows. However, the possibility to accurately solve the complex BN multiphase equations and perform real simulations has long represented a very ambitious goal. In recent years, this multiphase model has undergone intensive analytical development, and new advance in applied mathematics and scientific computing opens promising opportunity to reach this goal of finding accurately and efficiently its numerical solutions. A five year research program is proposed to develop a computational framework with state-of-the-art scientific computing strategies for simulating compressible multiphase flow of energetic systems. This will be accomplished through computational analyses to develop new high-order numerical methods for the accurate solutions of the BN multiphase model, and experiments of suitably defined multiphase problems to provide validation, empirical correlations and new observations for additional physical modeling. This technological advancement will be applied for fundamental studies of condensed explosives and solid propellants combustion, and detonation dynamics in heterogeneous gas-particle systems. This research will deliver a numerical technology applicable in defense, aerospace, automotive and mining industries, all of which are important to the Canadian economy. Results from the fundamental studies will not only provide information which advance the understanding of multiphase combustion and explosion, but will also lead to a broad impact to improve the formulation and characterization of explosives for novel applications, and to establish standards for the safe handling and storing of energetic materials in the military and other industrial settings.