Thermodynamics Simulation

Thermodynamics simulation is at the foundation of what we do at our Singapore office in BroadTech Engineering.

Featured Thermodynamics Simulation Case Studies

Investigation of Thermodynamic Processes Governing Selective Laser Sintering of Metals

Selective laser sintering is an additive manufacturing technique used for making parts out of metal powders.

This study is focused on the numerical investigation of heat transfer, melting, solidification and coalescence of metallic particles invoked by laser heating. The process involves multiple modes of heat transfer, phase change, mass and momentum transport in the powder bed

and is therefore very complex. In this project, multiple thermal models are developed in-house to describe heat transfer at different length scales.

The thermal model for radiation absorption and its transport in powder bed is based on non-continuum approach (DEM) considering the discrete nature of the medium. On the other hand, particle scale model describes the evolution of the temperature field and phase change in a particle, while assuming surrounding granular powder as a homogeneous medium.

A representative case of two particles in contact is considered for coupled thermal and hydrodynamic analysis. The governing equations for heat transfer and flow of liquid melt are solved using boundary element method. The coupled model accounts for heat transfer, phase change during laser heating cycle and resulting melt flow due to surface tension forces simultaneously.

Detailed study of the effect of process parameters on particle temperature evolution, contact growth, and densification rate is conducted and discussed.

This study helped understand the selective laser sintering process and micro as well as macro scale. It equips the end user to control the process parameters in a better way and provides direction to additive manufacturing industry to make advancement in the metal additive manufacturing.

Overview

1. FEA Consulting

2. CFD Consulting

3. LS-DYNA Consulting

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