By means of extensive particle dynamics simulations in a three-dimensional model, we analyze the rheology and granular texture in the steady-state of the viscoinertial granular flow. The interactions between dry particles are added by the theoretical description of the capillary cohesion forces and viscous forces due to the presence of the viscous liquid bridge. We show that the rheology of such flow characterized by the apparent friction coefficient and packing fraction can be nicely described as a function of the viscoinertial number combining the particle inertia and viscous stress of the liquid bridge by keeping the constant value of the liquid-vapor surface tension. Furthermore, the flow behavior can alternatively be described by the effective viscosities (normal and shear components) as a function of the imposed volume fraction, which is in good agreement with previous numerical simulations of particles immersed in a viscous fluid and experiments in dense suspensions. Interestingly, the granular texture characterized by the fabric and force anisotropies and the bond coordination number is also well-described by this modified inertial number. Remarkably, the stress transmission ratio reflects the intermediate relationship between microstructure and mechanical behavior of wet granular flow, expressed as a function of the viscoinertial number. We also find that shearing leads to variations of the compressive and tensile interactions between neighboring particles.

中文翻译：

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粘性惯性简单剪切流的流变学和颗粒结构

通过三维模型中广泛的粒子动力学模拟，我们分析了粘性惯性颗粒流稳态下的流变学和颗粒结构。由于粘性液桥的存在，毛细管内聚力和粘性力的理论描述增加了干颗粒之间的相互作用。我们表明，通过保持液-汽表面的恒定值，这种以表观摩擦系数和填充率为特征的流动的流变学可以很好地描述为结合粒子惯性和液桥粘应力的粘惯性数的函数紧张。此外，流动行为也可以通过作为施加体积分数的函数的有效粘度（法向和剪切分量）来描述，这与先前浸入粘性流体中的粒子的数值模拟和在稠密悬浮液中的实验非常吻合。有趣的是，以织物和力各向异性以及键配位数为特征的颗粒纹理也可以通过这个修正的惯性数很好地描述。值得注意的是，应力传递比反映了湿颗粒流的微观结构和力学行为之间的中间关系，表示为粘惯性数的函数。我们还发现剪切会导致相邻颗粒之间的压缩和拉伸相互作用发生变化。以织物和力各向异性以及键配位数为特征的粒状纹理也可以通过这个修改后的惯性数很好地描述。值得注意的是，应力传递比反映了湿颗粒流的微观结构和力学行为之间的中间关系，表示为粘惯性数的函数。我们还发现剪切会导致相邻颗粒之间的压缩和拉伸相互作用发生变化。以织物和力各向异性以及键配位数为特征的粒状纹理也可以通过这个修改后的惯性数很好地描述。值得注意的是，应力传递比反映了湿颗粒流的微观结构和力学行为之间的中间关系，表示为粘惯性数的函数。我们还发现剪切会导致相邻颗粒之间的压缩和拉伸相互作用发生变化。