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| Titel: |
Dynamics of Fibrous-Type Particles: Brownian Coagulation and the Charge Effect |
| Auteur: |
Lee, Paul S. Shaw, David T. |
| Verschenen in: |
Aerosol science and technology |
| Paginering: | Jaargang 3 (1984) nr. 1 pagina's 9-16 |
| Jaar: |
1984 |
| Inhoud: |
The Brownian coagulation of ultrafine chainlike or fibrous type particulate aerosols is theoretically investigated. The coagulation kernel is determined utilizing the concept of the effective collision diameter deff. Assuming equal a priori orientational probability, analytical expressions for deff are obtained. For monodispersive aerosols with particle length l » d, the diameter, deff reduces to l/2 for a collision between a particle and a plane wall, and deff ≃ 0.75l for a collision between two particles. In the latter case the coagulation kernel K ≃ 1.2kBT[ln(l/d) + 0.4]/η where kB is the Boltzmann constant and η is the viscosity, and the bipolar Boltzmann type particle charge distribution contributes to an increase in K of only about 7%. After corrections to K for slip and polydispersity, the theory agrees fairly well with the available data. The remaining discrepancy is probably caused by the effect of polarization. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 4 van 15 gevonden artikelen
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