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The application of aerosol sampling ...

Paik, Samuel Y.

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The application of aerosol sampling science towards the development of new generations of practical sampling instruments.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	The application of aerosol sampling science towards the development of new generations of practical sampling instruments./
Author:	Paik, Samuel Y.
Description:	224 p.
Notes:	Chair: James H. Vincent.
Contained By:	Dissertation Abstracts International63-10B.
Subject:	Health Sciences, Occupational Health and Safety. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3068940
ISBN:	0493886109

The application of aerosol sampling science towards the development of new generations of practical sampling instruments.
Paik, Samuel Y.

The application of aerosol sampling science towards the development of new generations of practical sampling instruments. - 224 p.

Chair: James H. Vincent.

Thesis (Ph.D.)--University of Michigan, 2002.

In the field of industrial hygiene, aerosol sampling science is important because it describes the physical processes that determine worker exposure to airborne particles. The recent adoption of international sampling conventions for aerosol sampling has stimulated the current need for new generations of practical sampling instruments that conform to specific, health-related, particle size-selective criteria. The broad objective of the research was to understand the complex processes that determine the performance (i.e., aspiration efficiency) of personal aerosol samplers, and apply what is learned in the development of a new, low-flowrate, personal inhalable aerosol sampler. Numerous experiments were conducted inside a small wind tunnel to characterize the performance of various types of samplers, including the simplest cases of thin-walled and disc-shaped samplers facing the wind and the more complex cases of blunt samplers mounted on rotating bluff bodies. The experiments provided insight into the aspiration characteristics of increasingly complex aerosol samplers, for particularly wide ranges of velocity ratio (the ratio of external windspeed and sampling velocity) and dimension ratio (the ratio of sampler orifice diameter and sampler body/bluff body width) that have not been investigated before. For most of the conditions that were tested, the sampler aspiration efficiencies were largely affected by velocity ratio and Stokes' number, and they were only weakly dependent on dimension ratio, especially when the samplers were at averaged orientations to the wind. The latter result markedly simplifies current protocols for testing personal samplers, which require that samplers be mounted on life-size mannequins and measure orientation-averaged aspiration efficiency. In addition, existing semi-empirical models were modified to improve their ability to predict sampler performances, and novel approaches were used to test commercial samplers and prototype samplers inside the small wind tunnel. The new knowledge was used to design and experimentally validate a prototype low-flowrate sampler that could accurately measure the inhalable fraction of total aerosols using a small-scale sampler testing system.

ISBN: 0493886109Subjects--Topical Terms:

1017799
Health Sciences, Occupational Health and Safety.

The application of aerosol sampling science towards the development of new generations of practical sampling instruments.
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005 20110505
008 110505s2002 eng d
020 $a 0493886109
035 $a (UnM)AAI3068940
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040 $a UnM $c UnM
100 1 $a Paik, Samuel Y. $3 1256337
245 1 0 $a The application of aerosol sampling science towards the development of new generations of practical sampling instruments.
300 $a 224 p.
500 $a Chair: James H. Vincent.
500 $a Source: Dissertation Abstracts International, Volume: 63-10, Section: B, page: 4605.
502 $a Thesis (Ph.D.)--University of Michigan, 2002.
520 $a In the field of industrial hygiene, aerosol sampling science is important because it describes the physical processes that determine worker exposure to airborne particles. The recent adoption of international sampling conventions for aerosol sampling has stimulated the current need for new generations of practical sampling instruments that conform to specific, health-related, particle size-selective criteria. The broad objective of the research was to understand the complex processes that determine the performance (i.e., aspiration efficiency) of personal aerosol samplers, and apply what is learned in the development of a new, low-flowrate, personal inhalable aerosol sampler. Numerous experiments were conducted inside a small wind tunnel to characterize the performance of various types of samplers, including the simplest cases of thin-walled and disc-shaped samplers facing the wind and the more complex cases of blunt samplers mounted on rotating bluff bodies. The experiments provided insight into the aspiration characteristics of increasingly complex aerosol samplers, for particularly wide ranges of velocity ratio (the ratio of external windspeed and sampling velocity) and dimension ratio (the ratio of sampler orifice diameter and sampler body/bluff body width) that have not been investigated before. For most of the conditions that were tested, the sampler aspiration efficiencies were largely affected by velocity ratio and Stokes' number, and they were only weakly dependent on dimension ratio, especially when the samplers were at averaged orientations to the wind. The latter result markedly simplifies current protocols for testing personal samplers, which require that samplers be mounted on life-size mannequins and measure orientation-averaged aspiration efficiency. In addition, existing semi-empirical models were modified to improve their ability to predict sampler performances, and novel approaches were used to test commercial samplers and prototype samplers inside the small wind tunnel. The new knowledge was used to design and experimentally validate a prototype low-flowrate sampler that could accurately measure the inhalable fraction of total aerosols using a small-scale sampler testing system.
590 $a School code: 0127.
650 4 $a Health Sciences, Occupational Health and Safety. $3 1017799
650 4 $a Health Sciences, Public Health. $3 1017659
650 4 $a Physics, Atmospheric Science. $3 1019431
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710 2 0 $a University of Michigan. $3 777416
773 0 $t Dissertation Abstracts International $g 63-10B.
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790 1 0 $a Vincent, James H., $e advisor
791 $a Ph.D.
792 $a 2002
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3068940