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Mass-transport aspects of pollutant removal at indoor surfaces

Nazaroff, William W. and Cass, Glen R. (1989) Mass-transport aspects of pollutant removal at indoor surfaces. Environment International, 15 (1-6). pp. 567-584. ISSN 0160-4120. https://resolver.caltech.edu/CaltechAUTHORS:20160630-071657255

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Abstract

The mass-transport-limited rate of pollutant deposition onto indoor surfaces is examined in this paper. Transport of both particles and highly reactive gases through the boundary layer of air adjacent to a surface is analyzed for three model airflow conditions: (1) natural convection flow along room surfaces, (2) forced laminar flow parallel to room surfaces, and (3) homogeneous turbulence in the core of the room. Transport mechanisms considered include convective diffusion, thermophoresis, and gravitational sedimentation. The predicted mass-transport-limited deposition velocity, averaged over the surfaces of a room, varies from order 10^(−6) to 10^(−2) m s^(−1) over the range of pollutant diffusivities and particle sizes encountered. Theoretical predictions are in rough agreement with the limited experimental data that have been taken inside rooms. Results show that if buildings were designed and operated such that natural convection of forced laminar flow conditions prevailed with surface temperatures a few degrees K warmer than the room air, soiling of vertical surfaces due to deposition of soot particles in the size range 0.1–1 μm diameter could be greatly reduced.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/0160-4120(89)90078-0DOIArticle
http://www.sciencedirect.com/science/article/pii/0160412089900780PublisherArticle
Additional Information:© 1989 Elsevier Ltd. Received 8 September 1987, Accepted 4 April 1989. This work was supported by a contract with the Getty Conservation Institute, Marina del Rey, California.
Funders:
Funding AgencyGrant Number
Getty Conservation InstituteUNSPECIFIED
Issue or Number:1-6
Record Number:CaltechAUTHORS:20160630-071657255
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20160630-071657255
Official Citation:William W. Nazaroff, Glen R. Cass, Mass-transport aspects of pollutant removal at indoor surfaces, Environment International, Volume 15, Issues 1–6, 1989, Pages 567-584, ISSN 0160-4120, http://dx.doi.org/10.1016/0160-4120(89)90078-0. (http://www.sciencedirect.com/science/article/pii/0160412089900780)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:68777
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:29 Mar 2018 18:07
Last Modified:03 Oct 2019 10:16

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