Numerical Simulation of Gas atomization in Close-C Eutectic Canada Inc.

气体雾化法是一种常用的金属粉末生产工艺，它是通过重力作用下下落的熔体流的快速破碎来实现的。熔体流的破碎开始于韧带的形成（初级雾化），随后进一步破碎并形成球形液滴（即二次破碎）。气体雾化过程的有效性直接影响制粉车间生产的粉末粒度分布。用这种工艺生产的粉末被用于关键的金属化应用，它们必须符合一定的规格。模拟气体雾化的能力，特别是气体和熔体流之间的相互作用区域，对于优化工艺参数以满足所需规格是一个有价值的进步。与EutecticCanada Inc.合作，作为一家领先的粉末制造商，我们的目标是计算最佳雾化气体流量和熔融金属温度，以防止熔融金属在雾化过程中凝固，并重要地预测最终的粒度分布。在本项目中，将进行多相流动和传热的计算流体动力学（CFD）模拟。我们期待这项研究的结果将允许Eurocket Canada Inc.以增强其在先进增材制造工艺以及各种涂层工艺（如HVOF和HVAF）中使用的可控和可重复金属粉末制造中的作用。此外，航空航天、汽车和能源行业的最终用户将从该项目中受益，提高他们的竞争力，并为魁北克和加拿大的经济做出贡献。

Gas atomization process is commonly used to produce metallic powders by rapid fragmentation of the flow ofmelt stream falling due to gravitational force. Fragmentation of melt stream starts with the formation ofligaments (primary atomization) followed by further breakup and the formation of spherical droplets (i.e.secondary breakup). The effectiveness of gas atomization process directly influences the powder sizedistribution produced in a powder manufacturing plant. Powders produced with this process are being used forcritical metallization applications and they must meet certain specifications. The ability to simulate the gasatomization particularly the zone of interaction between gas and melt stream is a valuable advancement for theoptimization of process parameters in order to meet the required specifications. In collaboration with EutecticCanada Inc., a leading powder manufacturer, we are aiming to calculate the optimized atomizing gas flow andmolten metal temperature in order to prevent the molten metal solidification during the atomization processand importantly predict the final particle size distribution. In this project, a Computational Fluid Dynamics(CFD) simulation of multiphase flow and heat transfer will be performed. We are expecting that the results ofthis study will allow Eutectic Canada Inc. to enhance its role in the fabrication of controllable and repeatablemetallic powders used in advanced additive manufacturing process as well as various coating processes such asHVOF and HVAF. Moreover, end users from aerospace, automotive, and energy sectors will benefit from theproject by enhancing their competitiveness and by contributing to the economy of Quebec and Canada.