Deposition rates of unattached and attached radon progeny in room with turbulent airflow and ventilation

Stevanović, N.; Markovic, V.M.; Nikezić, D.

doi:10.1016/j.jenvrad.2009.04.007

Cited by 11 publications

(13 citation statements)

References 11 publications

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“…After that, N<10 and N30−200 (and concomitantly Nt and dGM) remained constant and continued to do so also at flow rate 1200 m 3 h −1 in step 3, although with bigger fluctuations (Figs. 1a and 1b), presumably due to a stronger air turbulence affecting particle dynamics [11]. As expected, effective removal of the 30−200 nm particles in step 1 (Fig.…”

Section: Resultssupporting

confidence: 77%

The Effect of Air Filtration on the Fraction of Unattached Radon Products

Vaupotič¹,

Bezek²,

Kobal³

2017

RadJ

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Abstract. An air cleaner was installed in a room with elevated radon activity concentration, and the following parameters have been monitored: activity concentrations of 222 Rn (Rn) and its short-lived products (RnP), degree of equilibrium between Rn and RnP (F), fraction of unattached RnP (fun), and the number concentration and size distribution of aerosol particles (5-530 nm). Several hours of filtration removed the >10 nm particles almost completely, thus increasing the contribution of the <10 nm particles, associated with unattached RnP. Consequently, fun was substantially augmented with a concomitant decrease in F.

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Section: Resultssupporting

confidence: 77%

The Effect of Air Filtration on the Fraction of Unattached Radon Products

Vaupotič¹,

Bezek²,

Kobal³

2017

RadJ

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“…The deposition rate of attached fraction, l a d is a linear function of friction velocity (Stevanovic et al, 2009b). Here, deposition rate of attached fraction, l a d , was calculated by Eq.…”

Section: Resultsmentioning

confidence: 99%

“…It is the attachment rate per unit aerosol concentration, l a1 , which is also introduced in this work and can be treated as a parameter. Stevanovic et al (2009b) showed that the ventilation rate coefficient changes friction velocity and influences the deposition rate coefficient of attached fraction. The increment of friction velocity due to ventilation can be determined Du * ¼ 9.09$l v and Eq.…”

Section: Resultsmentioning

confidence: 99%

“…According to the Zhao and Wu (2006) model, turbulent indoor airflow and deposition velocity were characterized by friction velocity, u * . It was shown that with increasing ventilation the deposition rates of unattached and attached progeny also increase and relationships between these three parameters were found (Stevanovic et al, 2009b). As consequence, these parameters cannot be treated as independent between themselves.…”

Section: Introductionmentioning

confidence: 99%

“…the ventilation rate, l v , is equal or close to zero. Recently, by using the particle deposition model for turbulent indoor airflow described by Zhao and Wu (2006), and assuming that airflow is present within the room, the deposition rates of unattached and attached radon progeny were determined (Stevanovic et al, 2009b). According to the Zhao and Wu (2006) model, turbulent indoor airflow and deposition velocity were characterized by friction velocity, u * .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Relationship between deposition and attachment rates in Jacobi room model

Stevanović

Markovic

Nikezić

2010

Journal of Environmental Radioactivity

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A Computational Fluid Dynamics code for aerosol and decay-product studies in indoor environments

Agarwal

Sahoo

Kumar

et al. 2021

J Radioanal Nucl Chem

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In the present work, Computational Fluid Dynamics (CFD) code has been used to simulate the behaviour of aerosols and decay products of 222 Rn/ 220 Rn in indoor environments. The code has been incorporated with simulation modules describing relevant physical processes governing the aerosol and decay product dynamics such as particle deposition, gravitational settling, thermophoresis, coagulation and size dependent attachment of decay products to aerosol. Subsequently, reliability and consistency of the CFD code has been evaluated and validated by comparing simulated results with analytical and simulation results of well-known cases reported in literature. Comparison showed a good agreement within ± 3.5%.

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Deposition rates of unattached and attached radon progeny in room with turbulent airflow and ventilation

Cited by 11 publications

References 11 publications

The Effect of Air Filtration on the Fraction of Unattached Radon Products

The Effect of Air Filtration on the Fraction of Unattached Radon Products

Relationship between deposition and attachment rates in Jacobi room model

A Computational Fluid Dynamics code for aerosol and decay-product studies in indoor environments

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