Operational parameters impact on spatial and temporal distribution and multifractal characteristics of particulate matter concentration under the sink effect

The influences of different factors on spatial and temporal mass transfer mechanism and dynamic char-acteristics of particulate matter (PM) under the sink effect are not clear. The objective of this study was to quantitatively analyze the influences of operational parameters on spatial and temporal distribution and multifractal characteristics of indoor suspended PM concentration under the sink effect. Results showed that with the increase of the applied voltage of the purification device, the reverse increase processes of PM1 and PM2.5 concentrations were progressively attenuated, and PM10 and total suspended particulates (TSP) concentrations decreased clearly. The dynamic evolution processes of the PM concentration series all presented strong persistence and obeyed the scale-invariant power-law statistical distributions. The positive correlation of the PM concentration series between five distances increased with the increase of applied voltage. This study can provide a reference basis for further refining the PM purification theory system under the sink effect. (c) 2023 Elsevier Ltd. All rights reserved.

Automated summary

The objective of this study was to analyze the influences of operational parameters on the spatial and temporal distribution and multifractal characteristics of indoor suspended PM concentration under the sink effect. The results showed that with the increase of the applied voltage of the purification device, the concentrations of PM1 and PM2.5 decreased, while PM10 and TSP concentrations decreased significantly. The dynamic evolution processes of the PM concentration series showed strong persistence and followed scale-invariant power-law statistical distributions. The positive correlation between PM concentration series at five distances increased with the increase of applied voltage.