Title | A ‘‘test of concept’’ comparison of aerodynamic and mechanical resuspension mechanisms for particles deposited on field rye grass (Secale cercele). Part 1. Relative particle flux rates |
Publication Type | Journal Article |
Year of Publication | 2004 |
Authors | Gillette D.E, Lawson, Jr. RE, Thompson RS |
Journal | Atmospheric Environment |
Volume | 38 |
Pagination | 4789-4797 |
Date Published | 2004 |
Call Number | 00872 |
Keywords | aeolian processes, transport, aerodynamic, aerosol, article, grass, journal, resuspension, wind tunnel |
Abstract | Resuspension of uniform latex micro spheres deposited on a single seed pod of field rye grass stalk and head was investigated experimentally in a wind tunnel. The experiment was designed to distinguish aerodynamic (viscous and turbulent) mechanisms from mechanical resuspension resulting from the oscillatory impact of the grass hitting a stationary object. The experiment was run for deposited spherical latex particles with diameters from 2 to 10 mm. Wind tunnel tests were run for wind speeds from 2 to 18.5ms1 and a turbulence intensity (root-mean-square fluctuation wind speed/mean wind speed) of 0.1. Our experiments showed the following for our test of concept experiment:* Resuspension particle flux increases when mechanical impacts occur.* Mechanical resuspension dominated for 2 mm particles over purely aerodynamic resuspension, but for larger particles aerodynamic mechanisms were roughly equally effective in resuspending particles. |
Reprint Edition | In File (05/16/2006) |