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Experimental measurements of aerosol deposition to smooth and rough surfaces
Abstract The deposition velocity of aerosol particles from turbulent flow to smooth and rough pipe wall has been determined. Three pipes with different surface conditions were used, the first was glass to represent a perfectly smooth surface, while the others (brass) have different roughness sizes. The roughness sizes were measured and represented by the centerline average values. The experiments covered a particle size range of 1–6.2 μm diameter with dimensionless particle relaxation time in the range of 0.37–14.7 and a flow Reynolds riumber of . The experimental dimensionless roughness size K+ were 0.56 and 1.65 for rough pipes. The results were compared with experiments of Liu and Agarwal (1974, J. Aerosol Sci. 5, 145–155.) for smooth pipes and the recent theories of turbulent deposition to rough surfaces. The experimental results are to a large extent in agreement with experiments and theories of other investigators for smooth pipes. The measured deposition velocities agree more closely with those predicted using the theory of El-Shobokshy and Ismail when compared with other theories.
Experimental measurements of aerosol deposition to smooth and rough surfaces
Abstract The deposition velocity of aerosol particles from turbulent flow to smooth and rough pipe wall has been determined. Three pipes with different surface conditions were used, the first was glass to represent a perfectly smooth surface, while the others (brass) have different roughness sizes. The roughness sizes were measured and represented by the centerline average values. The experiments covered a particle size range of 1–6.2 μm diameter with dimensionless particle relaxation time in the range of 0.37–14.7 and a flow Reynolds riumber of . The experimental dimensionless roughness size K+ were 0.56 and 1.65 for rough pipes. The results were compared with experiments of Liu and Agarwal (1974, J. Aerosol Sci. 5, 145–155.) for smooth pipes and the recent theories of turbulent deposition to rough surfaces. The experimental results are to a large extent in agreement with experiments and theories of other investigators for smooth pipes. The measured deposition velocities agree more closely with those predicted using the theory of El-Shobokshy and Ismail when compared with other theories.
Experimental measurements of aerosol deposition to smooth and rough surfaces
El-Shobokshy, M.S. (author)
Atmospheric Environment ; 17 ; 639-644
1982-07-27
6 pages
Article (Journal)
Electronic Resource
English
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