Multiscale Simulation with a Two‐Way Coupled Lattice Boltzmann Method and Discrete Element Method
Multiscale Simulation with a Two‐Way Coupled Lattice Boltzmann Method and Discrete Element Method
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DOI：
10.1002/ceat.201600547
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发表时间：
2017-09
影响因子：
2.1
通讯作者：
Marie-Luise Maier;T. Henn;Gudrun Thaeter;H. Nirschl;M. Krause
中科院分区：
文献类型：
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作者：
Marie-Luise Maier;T. Henn;Gudrun Thaeter;H. Nirschl;M. Krause
模拟有助于更好地理解化学或过程工程中发生的过程中大量颗粒和流体的动力学和相互作用。取决于悬浮液是稠密的、稀的还是半稀的，颗粒和流体可以相互影响。在这里，流体的格子玻尔兹曼方法与粒子的离散元方法相结合，作为点粒子处理。两者都是双向耦合的阻力，基于动量交换。单颗粒沉降被选为单向和双向耦合的第一个验证示例。对于稠密悬浮液，接触力是必要的，并且在进行多颗粒块的模拟之前验证了两个碰撞颗粒的情况。
Simulations are helpful to better understand the dynamics and interactions of large numbers of particles and fluid in processes that occur in chemical or process engineering. Depending on whether the suspension is dense, dilute or semi-dilute, the particles and fluid can be mutually affected. Here, a Lattice Boltzmann method for the fluid is combined with a discrete element method for the particles, treated as point particles. Both are two-way coupled by drag forces, based on momentum exchange. Single particle sedimentation is chosen as a first validation example for one- and two-way coupling. For dense suspensions contact forces ace necessary and a scenario for two colliding particles is verified before the simulation of a multi-particle block is performed.