Removal of particles from a powdery fouled surface due to impaction

M.S. Abd-Elhady, C.C.M. Rindt, J.G. Wijers, A.A. Steenhoven, van

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

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Samenvatting

Particulate fouling is defined as the unwanted deposition of particles on heat exchange surfaces. The fouling layer reduces the heat transfer rate and leads to inefficient operation. The net fouling rate is the result of the difference between the deposition rate and the removal rate of particles. One of the mechanisms that contribute to the removal of particles from powdery fouled surfaces, is the collision of an incident particle with the fouled surface. In the present study, removal of particles from powdery fouled surfaces due to an incident particle impact is studied numerically and experimentally. A numerical model is developed to study the interaction of an incident particle with a bed of particles. The numerical model is based on the molecular dynamic theory of granular matter. The numerical model is tested for an incident copper particle hitting a bed of particles at different impact speeds. The numerical results are verified experimentally. An experimental setup has been built to study the removal of particles from powdery fouling layers due to an incident particle impact. It is shown that depending on the impact speed, zero, one, two or three particles are ejected from the powdery layer. By comparing the numerical results with the experimental measurements it is shown that the numerical results fit in the measured range of impact mentioned above. The numerical model will be used further to characterize the removal of particles from powdery fouling layers as function of particle size, material, incident particle impact speed and the bed of particles porosity.
Originele taal-2Engels
Titel2003 ECI Conference on Heat Exchanger Fouling and Cleaning: Fundamentals and Applications
RedacteurenP. Watkinson
Plaats van productieSanta Fe, New Mexico
Pagina's128-136
StatusGepubliceerd - 2004
Evenementconference; 2003 ECI Conference on Heat Exchanger Fouling and Cleaning: Fundamentals and Applications; 2003-05-18; 2003-05-22 -
Duur: 18 mei 200322 mei 2003

Congres

Congresconference; 2003 ECI Conference on Heat Exchanger Fouling and Cleaning: Fundamentals and Applications; 2003-05-18; 2003-05-22
Periode18/05/0322/05/03
Ander2003 ECI Conference on Heat Exchanger Fouling and Cleaning: Fundamentals and Applications

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  • Citeer dit

    Abd-Elhady, M. S., Rindt, C. C. M., Wijers, J. G., & Steenhoven, van, A. A. (2004). Removal of particles from a powdery fouled surface due to impaction. In P. Watkinson (editor), 2003 ECI Conference on Heat Exchanger Fouling and Cleaning: Fundamentals and Applications (blz. 128-136).