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CFD modeling the diffusional losses of nanocluster-sized particles and condensing vapors in 90° bends of circular tubes

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CFD modeling the diffusional losses of nanocluster-sized particles and condensing vapors in 90° bends of circular tubes. / Olin, Miska; Dal Maso, Miikka.

In: Journal of Aerosol Science, Vol. 150, 105618, 2020.

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@article{2f327344d68f446eade2301a7058fd0e,
title = "CFD modeling the diffusional losses of nanocluster-sized particles and condensing vapors in 90° bends of circular tubes",
abstract = "Particle and vapor measurements typically include sampling tubing causing sampling losses therein. Correcting measured concentrations from the sampling losses using the calculated penetration efficiencies of straight tubes is a satisfactory approximation if sub-micrometer particles are of interest. However, in addition to inertial impaction of larger particles, bends in the tubing can cause a significant increase in diffusional losses of particles smaller than 5 nm or of condensing vapor, such as sulfuric acid. Here, the effects of 90° bends with various curvatures (dimensionless curvatures of 1.3−67) on the diffusional losses in a wide range of Reynolds (25−10000) and Schmidt (0.48−1400) numbers were simulated using computational fluid dynamics. The results were parametrized to output the functions for the penetration efficiencies of a bend.",
keywords = "Bend, Diffusion, Nanocluster, Sulfuric acid",
author = "Miska Olin and {Dal Maso}, Miikka",
year = "2020",
doi = "10.1016/j.jaerosci.2020.105618",
language = "English",
volume = "150",
journal = "Journal of Aerosol Science",
issn = "0021-8502",
publisher = "Elsevier",

}

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TY - JOUR

T1 - CFD modeling the diffusional losses of nanocluster-sized particles and condensing vapors in 90° bends of circular tubes

AU - Olin, Miska

AU - Dal Maso, Miikka

PY - 2020

Y1 - 2020

N2 - Particle and vapor measurements typically include sampling tubing causing sampling losses therein. Correcting measured concentrations from the sampling losses using the calculated penetration efficiencies of straight tubes is a satisfactory approximation if sub-micrometer particles are of interest. However, in addition to inertial impaction of larger particles, bends in the tubing can cause a significant increase in diffusional losses of particles smaller than 5 nm or of condensing vapor, such as sulfuric acid. Here, the effects of 90° bends with various curvatures (dimensionless curvatures of 1.3−67) on the diffusional losses in a wide range of Reynolds (25−10000) and Schmidt (0.48−1400) numbers were simulated using computational fluid dynamics. The results were parametrized to output the functions for the penetration efficiencies of a bend.

AB - Particle and vapor measurements typically include sampling tubing causing sampling losses therein. Correcting measured concentrations from the sampling losses using the calculated penetration efficiencies of straight tubes is a satisfactory approximation if sub-micrometer particles are of interest. However, in addition to inertial impaction of larger particles, bends in the tubing can cause a significant increase in diffusional losses of particles smaller than 5 nm or of condensing vapor, such as sulfuric acid. Here, the effects of 90° bends with various curvatures (dimensionless curvatures of 1.3−67) on the diffusional losses in a wide range of Reynolds (25−10000) and Schmidt (0.48−1400) numbers were simulated using computational fluid dynamics. The results were parametrized to output the functions for the penetration efficiencies of a bend.

KW - Bend

KW - Diffusion

KW - Nanocluster

KW - Sulfuric acid

U2 - 10.1016/j.jaerosci.2020.105618

DO - 10.1016/j.jaerosci.2020.105618

M3 - Article

VL - 150

JO - Journal of Aerosol Science

JF - Journal of Aerosol Science

SN - 0021-8502

M1 - 105618

ER -