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OpenFOAM, software for computational fluid dynamics, generates a Gaussian-distributed laser heat source in a powder bed and creates a mesoscopic multiphase model using the computational fluid mechanics–discrete element method (CFD-DEM) approach. The model explains physical phenomena like fusion zone, laser-particle interaction, conduction, convection, radiation, melting, and solidification. The study analyzes process variables like laser power, hatch distance, and laser beam velocity to optimize the selective laser melting process in additive manufacturing. The simulation of granular powder flow particles and the development of the powder bed is investigated using the discrete element method (DEM) in LIGGGHTS software. The study considers the temperature-dependent properties of materials, namely thermal conductivity and specific heat. It uses a laser source of 100 W at three different hatch spacing of 75, 100, and 125% of laser beam diameter to analyze the melting quality. The results show that a hatch distance less than the beam diameter yields better melting quality.

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Coupled CFD-DEM Numerical Modeling of SLM Process of Ti-6Al-4V Alloy Using Temperature-Dependent Properties

  • 会议论文

  • 发表日期：

    2025年

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  • V. S. Abhiram,
  • Mathews Peter,
  • V. S. Anaswara,
  • Premdip Kumar,
  • Sumant Yadav,
  • Dharmendra Kumar,
  • M. Jacob Koshy,
  • K. P. Vineesh,
  • Murshid Imam,
  • Viswanath Chinthapenta,
  • Raghuram,
  • Karthik Desu,
  • J. John Rozario Jegaraj

摘要

OpenFOAM, software for computational fluid dynamics, generates a Gaussian-distributed laser heat source in a powder bed and creates a mesoscopic multiphase model using the computational fluid mechanics–discrete element method (CFD-DEM) approach. The model explains physical phenomena like fusion zone, laser-particle interaction, conduction, convection, radiation, melting, and solidification. The study analyzes process variables like laser power, hatch distance, and laser beam velocity to optimize the selective laser melting process in additive manufacturing. The simulation of granular powder flow particles and the development of the powder bed is investigated using the discrete element method (DEM) in LIGGGHTS software. The study considers the temperature-dependent properties of materials, namely thermal conductivity and specific heat. It uses a laser source of 100 W at three different hatch spacing of 75, 100, and 125% of laser beam diameter to analyze the melting quality. The results show that a hatch distance less than the beam diameter yields better melting quality.