Deposition rates on smooth surfaces and coagulation of aerosol particles inside a test chamber

Hussein, Tareq; Hruška, Aleš; Dohányosová, Pavla; Džumbová, Lucie; Hemerka, Jiří; Kulmala, Markku; Smolik, J.

doi:10.1016/j.atmosenv.2008.10.059

Cited by 107 publications

(86 citation statements)

References 54 publications

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“…, which is consistent with Hussein et al (2009) and Yu et al (2013). Meanwhile, DSMC can predict the aerosol decay when the aerosol number concentration is higher than 10 4 cm −3 .…”

Section: Aerosol Concentration Simulation By Dsmcsupporting

confidence: 68%

“…The wall-loss correction under the present conditions was validated with aerosol number concentration lower than 10 4 cm −3 . If the concentration is higher, coagulation must be taken into consideration, as consistent with Hussein et al (2009) and Yu et al (2013). A DSMC with metropolis sampling was established to describe aerosol dynamics in a chamber, which gives results in consistent with experimental data even the aerosol number concentration is as high as 10 6 cm −3 .…”

Section: Resultsmentioning

confidence: 70%

“…The number concentrations of aerosol were controlled below 10 9 m 3 to avoid the effects of turbulent and coagulation (Okuyama et al 1986;Hussein et al 2009;Yu et al 2013). The parameters a and b were fitted by the data to Eq.…”

Section: The Decay Coefficientmentioning

confidence: 99%

“…However, coagulation can cause aerosol diameters to increase and hence has influence on aerosol loss to a certain extent. According to more recent researches (Hussein et al 2009;Yu et al 2013), for aerosol with number concentration more than 10 4 cm −3 , coagulation can have more impact on aerosol number concentration than deposition, though the threshold shifts to some degree as diameter and size distribution differ.…”

Section: Introductionmentioning

confidence: 99%

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Decay of High-Concentration Aerosol in a Chamber

Liu

Yang

et al. 2017

Aerosol Sci Eng

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High-concentration aerosol is supposed to be crucial in some air pollution events. Aerosol always decays due to such mechanisms as coagulation, gravitational settling and diffusion deposition in a chamber; so its concentration needs to be calibrated in chamber experiments, especially for high-concentration aerosol. Two methods including the wall-loss correction and the direct simulation Monte Carlo (DSMC) were used to describe decay of the aerosol concentration. The parameters of diffusion deposition were fitted by experimental data. The results by both methods were compared to the experimental results of high-concentration aerosol decay process. The results show that the wall-loss correction under the present conditions is valid when the initial total aerosol concentration is less than 10 4 cm −3 , and the DSMC results are consistent to the experimental data for concentration ranging from 10 4 cm −3 to more than 10 6 cm −3 .

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“…, which is consistent with Hussein et al (2009) and Yu et al (2013). Meanwhile, DSMC can predict the aerosol decay when the aerosol number concentration is higher than 10 4 cm −3 .…”

Section: Aerosol Concentration Simulation By Dsmcsupporting

confidence: 68%

Section: Resultsmentioning

confidence: 70%

Section: The Decay Coefficientmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Decay of High-Concentration Aerosol in a Chamber

Liu

Yang

et al. 2017

Aerosol Sci Eng

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“…As shown, the PM 2.5 concentration in the chamber gradually decreases over time, attributed to PM deposition in the chamber by gravity and Brownian motion. [28][29][30] According to previous studies, the highest deposition rates occur for the largest particles of ∼1-10 µm, which are governed mostly by gravity and tend to settle on horizontal surfaces, and for the smallest particles of ∼0.01-0.1 µm, which are mostly governed by Brownian motion and tend to diffuse and collide with the floor, walls, or ceiling of the chamber. Fig.…”

Section: Resultsmentioning

confidence: 99%

Observation of convection phenomenon by high-performance transparent heater based on Pt-decorated Ni micromesh

Kim

et al. 2017

AIP Advances

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In this study, we report for the first time on the convection phenomenon for the consistent and sensitive detection of target materials (particulate matter (PM) or gases) with a high-performance transparent heater. The high-performance transparent heater, based on Pt-decorated Ni micromesh, was fabricated by a combination of transfer printing process and Pt sputtering. The resulting transparent heater exhibited excellent mechanical durability, adhesion with substrates, flexibility, and heat-generating performance. We monitored the changes in the PM concentration and temperature in an airtight chamber while operating the heater. The temperature in the chamber was increased slightly, and the PM2.5 concentration was increased by approximately 50 times relative to the initial state which PM is deposed in the chamber. We anticipate that our experimental findings will aid in the development and application of heaters for sensors and actuators as well as transparent electrodes and heating devices.

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Environmental Health in Built Environments

Nasir

2013

Aerosol Science

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Deposition rates on smooth surfaces and coagulation of aerosol particles inside a test chamber

Cited by 107 publications

References 54 publications

Decay of High-Concentration Aerosol in a Chamber

Decay of High-Concentration Aerosol in a Chamber

Observation of convection phenomenon by high-performance transparent heater based on Pt-decorated Ni micromesh

Environmental Health in Built Environments

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