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A mesoscopic model for transient mass transfer of volatile organic compounds from porous walls of different structures
Su, Yan1; Ng, Tinian1; Zhang, Yinping2; Davidson, Jane H.3
2018-02
Source PublicationINTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
ISSN0017-9310
Volume117Pages:36-49
Abstract

Transient mass diffusion and convection of volatile organic compounds (VOCs) from walls is an important issue for air quality in buildings. In the present work, a new model of these processes that captures mass transport within the wall structure is presented and applied for a ventilated enclosure. Porous wall structures composed of two solid phases (one carrying the VOC and one inert) and one fluid phase air are generated by the Controllable Structure Generation Scheme (CSGS) based on discrete Gaussian quadrature space and velocity. Mesoscopic scale parallel non-dimensional lattice Boltzmann method (P-NDLBM) simulations are performed for relevant ranges of wall porosity, Reynolds and Schmidt numbers for a two-dimensional enclosure with a top inlet and bottom outlets. The effect of the wall structure on mass transfer in the enclosure"is investigated for two wall structures: type (A) a wall with randomly immersed particles, and type (B) a shape-separated wall structure. Results include transient VOC concentration and streamlines in the porous wall and the enclosure for a vary of porosities and diffusivities for each phase. The pore structure and porosity of the wall have significant impact on mass transfer. Type (B) structures are more favorable for rapid mass transfer within the wall. (C) 2017 Elsevier Ltd. All rights reserved.

KeywordVoc Porous Medium Lattice Boltzmann Indoor Air Mass Transfer
DOI10.1016/j.ijheatmasstransfer.2017.09.131
URLView the original
Indexed BySCI
Language英语
WOS Research AreaThermodynamics ; Engineering ; Mechanics
WOS SubjectThermodynamics ; Engineering, Mechanical ; Mechanics
WOS IDWOS:000417963300004
PublisherPERGAMON-ELSEVIER SCIENCE LTD
The Source to ArticleWOS
Fulltext Access
Citation statistics
Cited Times [WOS]:4   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTROMECHANICAL ENGINEERING
Affiliation1.Department of Electromechanical Engineering, University of Macau, Taipa, Macau
2.Department of Building Science, Tsinghua University, Beijing 100084, China
3.Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455, USA
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Su, Yan,Ng, Tinian,Zhang, Yinping,et al. A mesoscopic model for transient mass transfer of volatile organic compounds from porous walls of different structures[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2018,117:36-49.
APA Su, Yan,Ng, Tinian,Zhang, Yinping,&Davidson, Jane H..(2018).A mesoscopic model for transient mass transfer of volatile organic compounds from porous walls of different structures.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,117,36-49.
MLA Su, Yan,et al."A mesoscopic model for transient mass transfer of volatile organic compounds from porous walls of different structures".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 117(2018):36-49.
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