Fast flow simulation study of pulsating ventilation performance on air contaminant removal
作者机构：School of Environment and ArchitectureUniversity of Shanghai for Science and Technology516 Jungong RoadShanghai200093China
出 版 物：《Building Simulation》 (建筑模拟（英文）)
年 卷 期：2024年第17卷第8期
页 面：1309-1322页
核心收录：
学科分类：08[工学] 081404[工学-供热、供燃气、通风及空调工程] 0814[工学-土木工程]
基 金：supported by the National Natural Science Foundation of China under the grant number of 52278116
主 题：pulsating ventilation fast fluid dynamics fractional step method contaminant removal efficiency time-periodic supply vortex structure
摘 要：Fast flow simulation is imperative in the design of pulsating ventilation,which is potentially efficient in indoor air contaminant *** execution of the conventional CFD method requires considerable amount of computational *** this study,five different numerical schemes were proposed based on fast fluid dynamics(FFD)and fractional step(FS)methods,and were evaluated to achieve quick simulation of airflow/contaminant *** of these numerical schemes was identified with the best overall computing efficiency for investigating the performance of pulsating *** this numerical scheme at hand,the air contaminant removal effectiveness of different ventilation types was *** kinds of pulsating ventilation and one kind of steady ventilation were tested upon a benchmark isothermal mixing *** effect of adjusting supply velocity parameters on the ventilation performance was also ***_(2)concentration,airflow pattern,and vortex structure of different ventilation types were illustrated and *** results reveal that the FS method is more suitable for transient simulation of wall-bounded indoor airflow than the FFD method,and 34%–51%of computing time could be saved compared to the conventional CFD *** the choice of ventilation type,steady ventilation might result in short-circuit airflow and stagnant zones;alternatively,pulsating ventilation has greater potential in air contaminant removal due to its ever-changing vortex structure.
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