The trail of perfumes

Joana Pereira; Patrícia Costa; Maria C. Coimbra; Alírio Egídio Rodrigues

doi:10.1002/aic.16155

The trail of perfumes

Joana Pereira, Patrícia Costa^*, Maria C. Coimbra, Alírio Egídio Rodrigues

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

A methodology is proposed for modeling the diffusion of fragrances released from a moving source. First, we started with a one-dimensional model considering molecular diffusion of α-pinene in air as the only mass transport mechanism. The validation was performed in a diffusion tube, and a system was developed to move the scented source along the axial direction. Results showed that experimental data fitted well with the numerical simulation, suggesting this model as a valid tool to describe the trail of a fragrance released from a moving source for low Re of the order of 10. In the case of a person walking at the speed of 1.34 m/s in a room or corridor inside a building, three-dimensional models are required and mass transport of the perfume to the surrounding air will be dominated by turbulent diffusion or eddy diffusion D_t which is two orders of magnitude higher than molecular diffusion.

Original language	English
Pages (from-to)	2890-2897
Number of pages	8
Journal	AICHE Journal
Volume	64
Issue number	7
DOIs	https://doi.org/10.1002/aic.16155
Publication status	Published - Jul 2018
Externally published	Yes

Keywords

Diffusion coefficient
Fragrances
Gas concentration
Modeling
Moving source

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10.1002/aic.16155

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title = "The trail of perfumes",

abstract = "A methodology is proposed for modeling the diffusion of fragrances released from a moving source. First, we started with a one-dimensional model considering molecular diffusion of α-pinene in air as the only mass transport mechanism. The validation was performed in a diffusion tube, and a system was developed to move the scented source along the axial direction. Results showed that experimental data fitted well with the numerical simulation, suggesting this model as a valid tool to describe the trail of a fragrance released from a moving source for low Re of the order of 10. In the case of a person walking at the speed of 1.34 m/s in a room or corridor inside a building, three-dimensional models are required and mass transport of the perfume to the surrounding air will be dominated by turbulent diffusion or eddy diffusion Dt which is two orders of magnitude higher than molecular diffusion.",

keywords = "Diffusion coefficient, Fragrances, Gas concentration, Modeling, Moving source",

author = "Joana Pereira and Patr{\'i}cia Costa and Coimbra, {Maria C.} and Rodrigues, {Al{\'i}rio Eg{\'i}dio}",

note = "Funding Information: This work was financially supported by: Project POCI-01– 0145-FEDER-006984—Associate Laboratory LSRE-LCM funded by FEDER through COMPETE2020—Programa Operacional Competitividade e Internacionalizac¸{\~a}o (POCI)— and by national funds through FCT - Fundac¸{\~a}o para a Ci{\^e}n-cia e a Tecnologia. P. Costa acknowledges her postdoctoral grant from the Fundac¸{\~a}o para a Ci{\^e}ncia e a Tecnologia (SFRH/BPD/93108/2013). Publisher Copyright: {\textcopyright} 2018 American Institute of Chemical Engineers",

year = "2018",

month = jul,

doi = "10.1002/aic.16155",

language = "English",

volume = "64",

pages = "2890--2897",

journal = "AICHE Journal",

issn = "0001-1541",

publisher = "Wiley-Blackwell",

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AU - Pereira, Joana

AU - Costa, Patrícia

AU - Coimbra, Maria C.

AU - Rodrigues, Alírio Egídio

N1 - Funding Information: This work was financially supported by: Project POCI-01– 0145-FEDER-006984—Associate Laboratory LSRE-LCM funded by FEDER through COMPETE2020—Programa Operacional Competitividade e Internacionalizac¸ão (POCI)— and by national funds through FCT - Fundac¸ão para a Ciên-cia e a Tecnologia. P. Costa acknowledges her postdoctoral grant from the Fundac¸ão para a Ciência e a Tecnologia (SFRH/BPD/93108/2013). Publisher Copyright: © 2018 American Institute of Chemical Engineers

PY - 2018/7

Y1 - 2018/7

N2 - A methodology is proposed for modeling the diffusion of fragrances released from a moving source. First, we started with a one-dimensional model considering molecular diffusion of α-pinene in air as the only mass transport mechanism. The validation was performed in a diffusion tube, and a system was developed to move the scented source along the axial direction. Results showed that experimental data fitted well with the numerical simulation, suggesting this model as a valid tool to describe the trail of a fragrance released from a moving source for low Re of the order of 10. In the case of a person walking at the speed of 1.34 m/s in a room or corridor inside a building, three-dimensional models are required and mass transport of the perfume to the surrounding air will be dominated by turbulent diffusion or eddy diffusion Dt which is two orders of magnitude higher than molecular diffusion.

AB - A methodology is proposed for modeling the diffusion of fragrances released from a moving source. First, we started with a one-dimensional model considering molecular diffusion of α-pinene in air as the only mass transport mechanism. The validation was performed in a diffusion tube, and a system was developed to move the scented source along the axial direction. Results showed that experimental data fitted well with the numerical simulation, suggesting this model as a valid tool to describe the trail of a fragrance released from a moving source for low Re of the order of 10. In the case of a person walking at the speed of 1.34 m/s in a room or corridor inside a building, three-dimensional models are required and mass transport of the perfume to the surrounding air will be dominated by turbulent diffusion or eddy diffusion Dt which is two orders of magnitude higher than molecular diffusion.

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KW - Moving source

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JF - AICHE Journal

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The trail of perfumes

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Keywords

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