CaltechAUTHORS
  A Caltech Library Service

Effect of Angle of Attack on the Performance of an Airborne Counterflow Virtual Impactor

Chen, Junhong and Conant, William C. and Rissman, Tracey A. and Flagan, Richard C. and Seinfeld, John H. (2005) Effect of Angle of Attack on the Performance of an Airborne Counterflow Virtual Impactor. Aerosol Science and Technology, 39 (6). pp. 485-491. ISSN 0278-6826. https://resolver.caltech.edu/CaltechAUTHORS:20150818-103220235

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20150818-103220235

Abstract

A three-dimensional model has been developed within the framework of the commercial computational fluid dynamics program, FLUENT®, to investigate the collection efficiency of an airborne counterflow virtual impactor (CVI). The model assumes steady-state, isothermal, compressible, and turbulent flow. Particle trajectories are computed based on the Lagrangian discrete phase model (DPM). In addition to predicting the effects of flight velocity and counterflow rate on the particle collection efficiency, as do prior models, the model quantifies the effect of flight attack angle on the particle collection efficiency. With an angle of attack as small as 5°, the CVI collection efficiency drastically degrades at large particle sizes, and only particles with intermediate sizes are collected. Smaller particles do not have sufficient inertia to fight the counterflow, and larger particles tend to impact the CVI inner walls and are lost to the CVI walls. The modeling results show that the alignment between the free stream flow and the CVI inlet is critical to the performance of the CVI.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1080/027868290964838DOIArticle
http://www.tandfonline.com/doi/abs/10.1080/027868290964838PublisherArticle
ORCID:
AuthorORCID
Flagan, Richard C.0000-0001-5690-770X
Seinfeld, John H.0000-0003-1344-4068
Additional Information:© 2005 American Association for Aerosol Research. Received 29 October 2004; accepted 8 April 2005.
Issue or Number:6
Record Number:CaltechAUTHORS:20150818-103220235
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150818-103220235
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59711
Collection:CaltechAUTHORS
Deposited By: Irina Meininger
Deposited On:19 Aug 2015 23:44
Last Modified:03 Oct 2019 08:49

Repository Staff Only: item control page