Skip to main content

Open Access Continuously Converging Multistage Focusing Lenses to Concentrate Aerosols at High Reynolds Numbers

Download Article:
 Download
(PDF)
 
All known multi-stage aerodynamic lenses able to focus sharply a wide range of particle sizes include decelerating regions where the flow becomes turbulent at Reynolds numbers Re typically of 100 or less. Here, we propose a design for a focusing concentrator operating laminarly at Re of many thousands. The particles are accelerated by the gas through a continuously converging ladder of smooth contractions, each designed such that: (1) the flow remains laminar at substantial Re; (2) a certain band of particle sizes is focused in each contraction, without substantial defocusing of larger particle focused in 1 or several preceding contractions; (3) the form, length, and ratio of entry to exit diameter of each contraction, as well as the number of consecutive contractions are chosen such that all particles within a given relatively wide range of sizes are focused at the end of the ladder of contractions into a relatively narrow focal region. The focusing virtual impactor formed by coupling this device to a perforated surface could provide a powerful particle concentrator.
No References for this article.
No Supplementary Data.
No Data/Media
No Metrics

Document Type: Research Article

Affiliations: 1: SEADM, Parque Tecnológico de Boecillo, Valladolid, Spain 2: Department of Mechanical Engineering,Yale University, New Haven,Connecticut, USA

Publication date: 2012-03-01

More about this publication?
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more