Abstract A phase-field-lattice Boltzmann model (PF-LBM) coupled with immersed boundary method is developed to simulate the growth and motion of dendrites against convection. A conservative phase-field model is employed to maintain mass conservation. A parallel adaptive mesh refinement (Para-AMR) approach is developed to improve the computational efficiency. Multi-dendrite growth and motion against 3-D cavity flow is simulated and simulation results reveal the morphological transition of moving dendrites, together with collision and coalescence. The interaction between dendrite and flow is accurately restored, enabling one to grasp and understand the microstructure evolution in practical solidification condition.

中文翻译：

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使用浸入边界法对枝晶运动进行相场-晶格 Boltzmann 模拟

摘要 建立了结合浸入边界法的相-场-晶格玻尔兹曼模型（PF-LBM）来模拟枝晶对抗对流的生长和运动。采用保守的相场模型来保持质量守恒。开发了一种并行自适应网格细化（Para-AMR）方法来提高计算效率。模拟了多枝晶生长和运动对抗 3-D 腔流，模拟结果揭示了移动枝晶的形态转变，以及碰撞和聚结。准确还原枝晶与流动之间的相互作用，使人们能够掌握和了解实际凝固条件下的组织演变。