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According to past research, vertical ventilation ducts could improve particle deposition rate. The removal efficiency could be achieved up to 80% for coarse particles and approximately 10% higher for ...fine particles. To enhance particle removal efficiency, we designed ventilation ducts with baffles to compare their particle removal performance to that of prior ventilation ducts without baffle. Three different designs were generated, one model with two baffles and two models with four baffles, which were also compared the effects on the particle transport mechanisms. When comparing the effectiveness of particle removal by using the simulated results, we found that vertical ventilation ducts with baffles increased particle deposition and reduced particle escape compared to duct without baffle. The percentage of particles retained in the ventilation duct increased proportionally with particle size in all cases. In comparison to different designs, integrating four baffles in opposite directions proposed a better filtering efficiency of particles.続きを見る
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