论文标题
金属添加剂制造的计算热多相流
Computational thermal multi-phase flow for metal additive manufacturing
论文作者
论文摘要
热多相流量模拟是必不可少的，对于了解金属添加剂制造（AM）过程中的多尺度和多物理现象，但是准确且鲁棒的预测仍然具有挑战性。本书章节总结了UIUC的最新方法开发，用于模拟激光粉末床融合（LPBF）和定向的能量沉积（DED）过程中的慢速流动。讨论了两个主要的方法发展。第一个是混合接口捕获/接口跟踪计算框架，旨在明确处理无需网格运动/重新安排的气体接口。第二个是针对DED过程的基于物理和非经验沉积几何学模型。通过将模拟结果与各种数量的实验测量进行彻底比较，可以评估所提出的框架的准确性。我们还报告了关键数量，这些实验无法测量以显示开发方法的预测能力。
Thermal multi-phase flow simulations are indispensable to understanding the multi-scale and multi-physics phenomena in metal additive manufacturing (AM) processes, yet accurate and robust predictions remain challenging. This book chapter summarizes the recent method development at UIUC for simulating thermal multiphase flows in laser powder bed fusion (LPBF) and directed energy deposition (DED) processes. Two main method developments are discussed. The first is a mixed interface-capturing/interface-tracking computational framework aiming to explicitly treat the gas-metal interface without mesh motion/re-meshing. The second is a physics-based and non-empirical deposit geometry model for DED processes. The proposed framework's accuracy is assessed by thoroughly comparing the simulated results against experimental measurements on various quantities. We also report critical quantities that experiments can not measure to show the predictive capability of the developed methods.
