Numerical simulation of the capture efficiency of an unflanged rectangular exhaust opening in a coaxial air flow

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Abstract

Numerical simulations were used to determine the capture efficiency of an unflanged rectangular exhaust opening in a uniform flow parallel to the hood centre-line.
The simulations were performed by the FLUENT computer code based on the finite volume method, using the standard k-ε turbulence model. After calculating the turbulent air flow field, a large number of submicrometre particles were released in different locations in front of the exhaust opening and the destination of the particles was determined. The capture efficiency was calculated as the ratio of the number of the particles captured by the exhaust hood to the number of the particles released. The calculations were verified by tracer gas measurements.
The calculated capture efficiencies were in satisfactory agreement with the experimental values. The results show also that a uniformly directed airflow may be used to enhance the capture efficiency of exhaust hoods.
Original languageEnglish
Pages (from-to)21-33
JournalAnnals of Occupational Hygiene
Volume39
Issue number1
DOIs
Publication statusPublished - 1995
MoE publication typeA1 Journal article-refereed

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title = "Numerical simulation of the capture efficiency of an unflanged rectangular exhaust opening in a coaxial air flow",
abstract = "Numerical simulations were used to determine the capture efficiency of an unflanged rectangular exhaust opening in a uniform flow parallel to the hood centre-line. The simulations were performed by the FLUENT computer code based on the finite volume method, using the standard k-ε turbulence model. After calculating the turbulent air flow field, a large number of submicrometre particles were released in different locations in front of the exhaust opening and the destination of the particles was determined. The capture efficiency was calculated as the ratio of the number of the particles captured by the exhaust hood to the number of the particles released. The calculations were verified by tracer gas measurements. The calculated capture efficiencies were in satisfactory agreement with the experimental values. The results show also that a uniformly directed airflow may be used to enhance the capture efficiency of exhaust hoods.",
author = "Ilpo Kulmala",
year = "1995",
doi = "10.1016/0003-4878(94)00104-9",
language = "English",
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journal = "Annals of Work Exposures and Health",
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Numerical simulation of the capture efficiency of an unflanged rectangular exhaust opening in a coaxial air flow. / Kulmala, Ilpo.

In: Annals of Occupational Hygiene, Vol. 39, No. 1, 1995, p. 21-33.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Numerical simulation of the capture efficiency of an unflanged rectangular exhaust opening in a coaxial air flow

AU - Kulmala, Ilpo

PY - 1995

Y1 - 1995

N2 - Numerical simulations were used to determine the capture efficiency of an unflanged rectangular exhaust opening in a uniform flow parallel to the hood centre-line. The simulations were performed by the FLUENT computer code based on the finite volume method, using the standard k-ε turbulence model. After calculating the turbulent air flow field, a large number of submicrometre particles were released in different locations in front of the exhaust opening and the destination of the particles was determined. The capture efficiency was calculated as the ratio of the number of the particles captured by the exhaust hood to the number of the particles released. The calculations were verified by tracer gas measurements. The calculated capture efficiencies were in satisfactory agreement with the experimental values. The results show also that a uniformly directed airflow may be used to enhance the capture efficiency of exhaust hoods.

AB - Numerical simulations were used to determine the capture efficiency of an unflanged rectangular exhaust opening in a uniform flow parallel to the hood centre-line. The simulations were performed by the FLUENT computer code based on the finite volume method, using the standard k-ε turbulence model. After calculating the turbulent air flow field, a large number of submicrometre particles were released in different locations in front of the exhaust opening and the destination of the particles was determined. The capture efficiency was calculated as the ratio of the number of the particles captured by the exhaust hood to the number of the particles released. The calculations were verified by tracer gas measurements. The calculated capture efficiencies were in satisfactory agreement with the experimental values. The results show also that a uniformly directed airflow may be used to enhance the capture efficiency of exhaust hoods.

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JO - Annals of Work Exposures and Health

JF - Annals of Work Exposures and Health

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