|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||CFD Modeling and Simulation in Materials Processing
||A Fully-Implicit, High-Order CFD Solver for Capturing Laser Melt Pool Dynamics in Additive Manufacturing
||Brian Weston, Jean-Pierre Delplanque, Robert Nourgaliev, Andy Anderson
|On-Site Speaker (Planned)
We present a new robust and efficient numerical framework for simulating multi-material flows with phase change (melting/solidification and evaporation/condensation). The work is motivated by laser-induced phase change applications, particularly the selective laser melting (SLM) process in additive manufacturing (AM). Physics-based simulations of the laser melt dynamics provide a parameter optimization capability, critical for the certification of AM produced parts. We utilize an all-speed Navier-Stokes solver, based on a fully-implicit, high-order reconstructed Discontinuous Galerkin method. The resulting set of non-linear equations is solved by a Newton-Krylov based framework, enabling robust simulations of the highly stiff compressible Navier-Stokes equations, due to the tight coupling of the equations in phase change problems. In this study, we demonstrate the method’s capabilities for equilibrium phase change on several different melting and freezing configurations, including a laser-induced melt convection problem. Future model enhancements will incorporate material evaporation and rapid solidification associated with the SLM process.
||Planned: A print-only volume