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首页> 外文期刊>Physica, A. Statistical mechanics and its applications >A LATTICE GAS APPROACH TO SHOCK PROPAGATION IN A CLAY-LIKE DEFORMABLE POROUS MEDIUM
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A LATTICE GAS APPROACH TO SHOCK PROPAGATION IN A CLAY-LIKE DEFORMABLE POROUS MEDIUM

机译：格状气体在黏土状可变形多孔介质中的传播

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A three-component interacting lattice gas model is introduced to study the shock propagation in a porous medium consisting of clay-like pore barriers, fluid particles, and empty sites to represent air and other constituents. An attractive potential between the clay particles is considered to generate a soft porous matrix containing fluid in the pores. The mobility of the clay and fluid particles can be varied as well as their concentrations to capture the details of different porous systems. A collision scheme is implemented with appropriate energy dissipation. We restrict to a square lattice and consider a line of shock. The velocity gradient caused by the shock drives the fluid and clay particles. Unusually superfast power-law behavior is observed for the rms displacements of the fluid and clay particles in this velocity-field-driven system; the power-law exponents seem to depend on details such as mass of the particles and their energy dissipation. We find that the propagation and attenuation of the shock front depend strongly on the type of particles, rigidity of the clay-matrix and its porosity. Various general features are observed such as smearing of the shock front with non-linear propagation and evolution of the velocity and density profiles in both fluid within the pores as well as the clay matrix as the shock propagates. [References: 26]
机译：引入了三组分相互作用的晶格气模型，以研究在多孔介质中的冲击传播，该介质由黏土状孔隙屏障，流体颗粒和代表空气和其他成分的空位组成。粘土颗粒之间的吸引力被认为产生了在孔中包含流体的柔软的多孔基质。粘土和流体颗粒的流动性及其浓度可以变化，以捕获不同多孔系统的细节。实施碰撞方案并消耗适当的能量。我们限制为方格，并考虑一条冲击线。由冲击引起的速度梯度驱动了流体和粘土颗粒。在这种速度场驱动的系统中，流体和粘土颗粒的均方根位移具有超常的幂律规律。幂律指数似乎取决于细节，例如粒子的质量及其能量耗散。我们发现，激波锋的传播和衰减在很大程度上取决于颗粒的类型，粘土基体的刚度及其孔隙率。观察到各种一般特征，例如具有非线性传播的冲击锋面的涂抹以及随着冲击传播，孔隙内的流体以及粘土基体中的速度和密度分布的变化。 [参考：26]

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