The Mathematics of Blunt Body Sampling: 38 (Lecture Notes in Engineering, 38) - Tapa blanda

Derek Binns Ingham, Sarah Jane Dunnett

 
9783540501473: The Mathematics of Blunt Body Sampling: 38 (Lecture Notes in Engineering, 38)
Tapa blanda
ISBN 10: 3540501479 ISBN 13: 9783540501473
Editorial: Springer Berlin Heidelberg, 1988

Sinopsis

Particle samplers are widely used in workplaces in order to determine the concentration of airborne particles in the atmosphere. They generally operate by drawing air, with the aid of a pump, through one or more orifices in the sampler body and housed within the sampler is a filter through which the air is subsequently drawn. The airborne particles are collected on the filter and their concentration is determined. Various samplers have been designed for this purpose including "static" samplers, which are located in a fixed position in a working environment and determine the dust concentration averaged over a prescribed period of time at that one point, and "personal" samplers which are mounted on a working person near to the breathing zone. The ORB sampler, a static sampler designed by Ogden and Birkett (1978) to have approximately the same entry efficiency, for particles with aerodynamical diameter up to at least 25~m, as a human head equally exposed to all wind directions for wind speeds between 0 and 2. 75m1s, is shown in Fig. l. l and examples of personal samplers are shown in Fig. 1. 2a, b and c and represent a single 4mm hole sampler, a seven hole sampler and a 25mm open face filter holder respectively. These three samplers are some of the most commonly used personal samplers for sampling the total airborne concentrations of workplace dusts in Britain.

"Sinopsis" puede pertenecer a otra edición de este libro.

Reseña del editor

Particle samplers are widely used in workplaces in order to determine the concentration of airborne particles in the atmosphere. They generally operate by drawing air, with the aid of a pump, through one or more orifices in the sampler body and housed within the sampler is a filter through which the air is subsequently drawn. The airborne particles are collected on the filter and their concentration is determined. Various samplers have been designed for this purpose including "static" samplers, which are located in a fixed position in a working environment and determine the dust concentration averaged over a prescribed period of time at that one point, and "personal" samplers which are mounted on a working person near to the breathing zone. The ORB sampler, a static sampler designed by Ogden and Birkett (1978) to have approximately the same entry efficiency, for particles with aerodynamical diameter up to at least 25~m, as a human head equally exposed to all wind directions for wind speeds between 0 and 2. 75m1s, is shown in Fig. l. l and examples of personal samplers are shown in Fig. 1. 2a, b and c and represent a single 4mm hole sampler, a seven hole sampler and a 25mm open face filter holder respectively. These three samplers are some of the most commonly used personal samplers for sampling the total airborne concentrations of workplace dusts in Britain.

Reseña del editor

The sampling of airborne particles in an environment is very important in assessing the risk to health of workers and many blunt sampling devices have been designed for this purpose. In this book sampling by aerodynamically blunt bodies is investigated mathematically for different situations. Existing approaches to the problem are described and improved upon. Also, a new approach is described which includes the use of the Boundary Integral Equation method. This method has advantages over other methods in that it makes it possible to consider samplers of various shapes with sampling taking place at arbitrary positions and includes the finiteness of the orifice in the model. One particular sampler, the human head, is investigated in detail. Also, using an analytical approach, the effects upon aspiration of the particle shape and the finite particle Reynolds number are investigated.

"Sobre este título" puede pertenecer a otra edición de este libro.

Editorial
Springer Berlin Heidelberg
Año de publicación
1988
Idioma
Inglés
ISBN 10 
3540501479
ISBN 13 
9783540501473
Encuadernación
Tapa blanda
Número de páginas
244
Contacto del fabricante
ProductSafety@springernature.com
ProductSafety@springernature.com

Poststr. 9
Darmstadt
64293
Alemania