Authors:
Alejo Avello (1,2), Ernesto Urionabarrenetxea (1,2), José Manuel Martín (1,2)
1- CEIT-Basque Research and Technology Alliance (BRTA), Donostia- San Sebastián, Spain
2- Universidad de Navarra, Tecnun, Donostia-San Sebastián, Spain.
Abstract:
Prediction of particle size distribution (PSD) in close-coupled gas atomization is of great interest to optimize nozzle designs and to accelerate the choice of optimum operational variables in first-time atomizations. Previous works have shown that CFD simulations based on simplifying assumptions can correctly predict trends of median particle size of copper powders produced at different nitrogen pressures. In this work, a refinement of the simulation procedure developed by the authors is pre-sented. Particle breakup is computed from a Discrete Phase Model (DPM), with injection input data calculated from an Eulerian model. The new model is used to compare, for the first time, simulated and experimental results of three different pairs metal-gas: copper with nitrogen, copper with argon and tin with nitrogen. Even for materials with such disparate melting points, the simulations predict quite accurately the median particle size for varying gas-to-metal mass flow rate ratios.
DOI:
https://doi.org/10.59499/EP246282819
