Smoothed particle hydrodynamics modeling and simulation of foundry filling process

铸造充型过程光滑粒子流体动力学建模及数值模拟（英文）

A numerical model of foundry filling process was established based on the smoothed particle hydrodynamics（SPH）method.To mimic the constraints that the solid mold prescribes on the filling fluid,a composite treatment to the solid boundaries is elaborately designed.On solid boundary surfaces,boundary particles were set,which exert Lennard-Jones force on approaching fluid particles;inside the solid mold,ghost particles were arranged to complete the compact domain of near-boundary fluid particles.Water analog experiments were conducted in parallel with the model simulations.Very good agreement between experimental and simulation results demonstrates the success of model development.

建立了模具充型过程的光滑粒子流体动力学方法数值模型。为了表征模具固壁对充型流体的约束,建立了一种耦合固壁边界条件。在固壁表面设置了L-S斥力粒子;在固壁内部设置了若干层边界虚粒子,实现对流体粒子支持域的补充。通过冷态水模拟实验对计算模型进行了验证。计算结果与实验吻合良好,证明了本文模型的有效性。