Abstract
Details of two experimental sets for droplet deposition in vertical upward air—water dispersed flow are presented: stainless steel and Plexiglas test section — together with typical experimental results, using different liquid concentrations and mean droplet sizes. The results obtained for different gas Reynolds numbers, ranging from 4xl04 to 9.5x 104, are given. The measurements of deposition showed that commonly used assumptions about the effect of droplet concentration on increase in droplet size, and decrease in droplet turbulence cannot completely explain the observed decrease of the deposition coefficient with increasing droplet concentration. Better agreement was obtained by taking into account the effect of the droplet sticking ratio (probability of sticking) to the wall. It is suggested that the presence of the liquid film causes a decrease in droplet sticking ratio.
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