| Abstract Scope |
Computational fluid dynamics (CFD) simulations are a useful tool for optimization of process parameters in additive manufacturing processes such as laser powder bed fusion and directed energy deposition. CFD models, which are based on a rigorous solution of the conservation equations can provide further insights into fluid convection in the melt pool, porosity formation, temperature gradients, cooling rates and microstructure predictions. With experimental studies capturing melt pool temperatures and dimensions, it is possible to validate the numerical models that incorporate physics such as viscous flows, heat transfer, recoil pressure, phase change, and solidification. In this presentation, case studies from industry and academia highlighting the successful use of CFD models in understanding the influence of process parameters such as laser power, beam shape and scan speeds on AM process stability are discussed. Furthermore, information from these CFD models can be used to accurately model additional aspects like residual stresses and distortions. |