Figshare最新文献

筛选

英文中文

Effect of Particle Size on the Rising Behavior ofnParticle-Laden Bubbles 粒径对含粒子气泡上升行为的影响

Figshare Pub Date : 2019-03-01 DOI: 10.1021/acs.langmuir.8b04112.s001

Peipei Wang (580944), Jan J. Cilliers (3906478), Stephen J. Neethling (6416807), Pablo R. Brito-Parada (3906469)

{"title":"Effect of Particle Size on the Rising Behavior ofnParticle-Laden Bubbles","authors":"Peipei Wang (580944), Jan J. Cilliers (3906478), Stephen J. Neethling (6416807), Pablo R. Brito-Parada (3906469)","doi":"10.1021/acs.langmuir.8b04112.s001","DOIUrl":"https://doi.org/10.1021/acs.langmuir.8b04112.s001","url":null,"abstract":"Thenrising behavior of bubbles, initially half and fully coatednwith glass beads of various sizes, was investigated. The bubble velocity,naspect ratio, and oscillation periods were determined using high-speednphotography and image analysis. In addition, the acting forces, dragnmodification factor, and modified drag coefficient were calculatednand interpreted. Results show that the aspect ratio oscillation ofnthe rising bubbles is similar, irrespective of the attached particlensize. As the particle size is increased, the rising bubbles have anlower velocity and aspect ratio amplitude, with the time from releasento each aspect ratio peak increasing. Higher particle coverage isnshown to decrease the bubble velocity and dampen the oscillations,nreducing the number of aspect ratio peaks observed. The highest risenvelocities correspond to the lowest aspect ratios and vice versa,nwhereas a constant aspect ratio yields a constant rise velocity, independentnof the particle size. Force analysis shows that the particle dragnmodification factor increases with the increased particle size andnis greatest for fully laden bubbles. The modified drag coefficientnof particle-laden bubbles increases with the increased particle size,nalthough it decreases with the increased Reynolds number independentnof the particle size. The drag force exerted by the particles playsna more dominant role in decreasing bubble velocities as the particlensize increases. The results and interpretation produced a quantitativendescription of the behavior of rising particle-laden bubbles and thendevelopment of correlations will enhance the modeling of industrialnapplications.","PeriodicalId":522135,"journal":{"name":"Figshare","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147892283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0