Hydrodynamics of an open vibrated granular system.
Hydrodynamics of an open vibrated granular system.
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DOI：
10.1103/physreve.63.061305
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发表时间：
2001-05
期刊：
影响因子：
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通讯作者：
J. Brey;M. Ruiz-Montero;F. Moreno
中科院分区：
文献类型：
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作者：
J. Brey;M. Ruiz-Montero;F. Moreno
采用流体力学描述和分子动力学模拟方法，研究了重力作用下流化颗粒系统的稳态。对于一个开放的系统，密度分布表现出一个最大值，而温度分布经历了一个最低值在高海拔，超过这一点，温度随高度增加。如果考虑无碰撞边界层的存在，则由流体动力学方程解释最小值的存在。还计算了粒子间碰撞所消耗的能量。理论与仿真结果吻合较好。与以前的作品的关系进行了讨论。
Using the hydrodynamic description and molecular dynamics simulations, the steady state of a fluidized granular system in the presence of gravity is studied. For an open system, the density profile exhibits a maximum, while the temperature profile goes through a minimum at high altitude, beyond that the temperature increases with the height. The existence of the minimum is explained by the hydrodynamic equations if the presence of a collisionless boundary layer is taken into account. The energy dissipated by interparticle collisions is also computed. A good agreement is found between theory and simulation. The relationship with previous works is discussed.