Abstract
This paper presents a novel multi-physics modelling approach of the Vapour Phase Soldering (VPS) process. The model applies combined transport mechanisms including heat transport by heat conduction; mass transport by diffusion in the fluids and by phase change during the evaporation and condensation of the Galden liquid; and energy transport caused by mass transport. The model can describe the temperature and vapour concentration relations in the oven – which are the main parameters of the vapour phase soldering process – from the start of the Galden evaporation until the saturation of the vapour space (prepared for soldering). The results calculated by the model show proper conformation with the experimental results of temperature and pressure measurements. The model was tested on a batch type VPS system where the position of the processing volume was optimized in the soldering tank. With the information obtained from the model the whole VPS process can be investigated.
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