Flame propagation of boron dust particles in heterogeneous media

• A thermal model based on discrete dust combustion has been generated in 3D space.
• The aim is to investigate the flame propagation of boron dust cloud.
• The model can be used to better prediction of different aspects of dust explosions.
• Also for a better design of safety systems.
• With the increase of oxygen mole fraction the value of flame speed tends to rise.

In this paper the combustion of boron dust clouds has been studied numerically in an environment with spatially discrete sources. A thermal model has been generated to estimate the flame propagation speed in various dust concentrations. Furthermore, flame speed as a function of particle diameter has been studied. The results show a very good agreement with the theoretical and experimental data. Also, in this case, a comparison between dust cloud combustion models has been made. Flame front propagation as a function of oxygen mole factor and pressure for certain particle sizes has been studied.

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