Fusion solid to liquid Video
Change of State - Matter - Physics - FuseSchool fusion solid to liquid
The design and production of high-performance components is within reach for industry. Nonetheless, it is essential to fusiln a better understanding of the powder-based feedstock materials, processes, structures, and properties to produce reliable PBMAM parts. In PBMAM processes, physical phenomena occurring during the layer-by-layer manufacturing, microstructure evolutions and mechanical properties of printed part are closely linked. Three different scales can be identified, i microscale, ii meso scale and iii macroscale.
In this context, it is essential to predict melt pool dynamics involved so,id PBMAM process since microstructure evolution and microscopic defects depend mainly on the melting of powder layer and the solidification of the melt pool. For process modelling, physics-based approaches are developed at meso scale. Meso-scale melt pool models can predict fluid flow and temperature distribution based on a multi-phase approach. The melt-pool model is computationally intensive in comparison with heat conduction model, the former is usually restricted to a layer deposition.
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Several discretization ljquid to treat the multiphase flow can be found in the literature. Click this work, a high order Discontinuous Galerkin scheme is used to provide high order convergence on unstructured mesh. This enables to capture with high accuracy those physical phenomena for such moving interface problem. The proposed CFD melt pool model is based on enthalpy-porosity formulation.
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This model is dedicated to hydrodynamics simulations under thermocapillary effects and thermal effects during solid liquid metal transition. The numerical challenges of simulating multiphase flows are strongly related to the discontinuity in properties at the interface slid jump conditions to be satisfied [3].
Multiphase problems imply a discontinuity in the solution strong discontinuity or in its derivative weak discontinuity on an interface evolving with time.]
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