| 21. |
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| 22. |
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| 23. |
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| 24. |
- Gudmundsson, Anders, et al.
(författare)
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Particle Deposition on the Human Eye
- 1992
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Ingår i: Proceedings of Symposium of the Nordic Society of Aerosol Research 1992, Undersökningsrapport 1992:29, Arbetsmiljöinstitutet.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 25. |
- Gudmundsson, Anders, et al.
(författare)
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Particle Size Calibration between the Aerodynamic Particle Sizer and Optical Microscope for Wind Tunnel Studies with Particles of Fused Alumina
- 1991
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Ingår i: Journal of Aerosol Science. - 0021-8502. ; 22 S1, s. 347-350
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Tidskriftsartikel (refereegranskat)abstract
- Abstract When studying the deposition of particles in wind tunnel experiments, we measure theairborne particles with an Aerodynamic Particle Sizer (APS). The deposited particles are examined with an optical microscope connected to an image analyzer. Calibration between the APS and the optical microscope determinations of particle size has been performed for particles of fused alumina. The particle size calibration procedure is performed by comparing the 50% cutoff sizes, determined with APS and optical microscopy measurements, for different single-stage impactors.
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| 26. |
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| 27. |
- Lastow, Orest, et al.
(författare)
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FiFi: Simulation of Dendrite Formation of Aerosol Particles on a Single Fibre
- 1992
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Ingår i: Journal of Aerosol Science. - 0021-8502. ; 23:S1, s. 105-108
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Tidskriftsartikel (refereegranskat)abstract
- A personal computer program, FiFi, that makes a real-time, two-dimensional simulation of the dynamic deposition process of particles on a single fibre, has been developed. The formation of dendrites and the particle transport as a function of different parameters are simulated. The trajectory of a spherical particle as a function of external forces and diffusion is calculated by integration and the particle moves across the display until it is captured or passes the fibre. The particles are captured directly on the fibre or on previously captured particles and form dendrites. A particle is characterised by five basic parameters which can be changed in various ways. The size and charge of the fibre are also parameters. At this state the flow around the fibre is described by either of three different air flow models, and four different electric fields can be simulated. The efficiency of any fibre-dendrite geometry can be calculated.
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| 28. |
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| 29. |
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| 30. |
- Schneider, Thomas, et al.
(författare)
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A Semiempirical model for Particle Deposition onto Facial Skin and Eyes. Role of Air Currents and Electric Fields
- 1994
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Ingår i: Journal of Aerosol Science. - 0021-8502. ; 25:3, s. 583-593
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Tidskriftsartikel (refereegranskat)abstract
- A semiempirical model has been developed for deposition velocity of particles on the forehead and eyes. It is based on published results of wind tunnel studies of deposition of 2-32 μm airborne particles onto the forehead and realistically-shaped eyes of a manikin. The effects of electric fields and particle charges were included in the model on a purely theoretical basis. The model was used to calculate the combined effects of air currents and electric fields, and it was found that electric fields and particle charges are major determinants for deposition of particles approximately 1 μm in diameter, and air turbulence likely to occur in ventilated rooms is a major determinant for particles larger than 10 μm. The model predicts that deposition of particles from typical indoor environments will be enhanced for persons exposed to electric fields, irrespective of the direction of the field. For a complete characterization, particle concentration, size distribution, mean air velocity, direction and turbulence intensity, electric fields and particle charge distribution should be known. For investigators of exposure to airborne particles and its relation to the office eye syndrome, the model can be used for identifying those parameters which are key for given conditions, thus simplifying the description of exposure.
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