EQUATIONS FOR CALCULATION OF THE TERMINAL VELOCITY AND DRAG COEFFICIENT OF SOLID SPHERES AND GAS BUBBLES
作者:
D. G. KARAMANEV,
期刊:
Chemical Engineering Communications
(Taylor Available online 1996)
卷期:
Volume 147,
issue 1
页码: 75-84
ISSN:0098-6445
年代: 1996
DOI:10.1080/00986449608936496
出版商: Taylor & Francis Group
关键词: Sphere;Gas bubble;Drag coefficient;Terminal velocity
数据来源: Taylor
摘要:
An analysis of the correlations proposed in the literature for calculation of the drag coefficient (CD) and the terminal velocity of a falling rigid sphere has been made. Among the correlations describingCDvs. Re, that of Turton and Levenspiel fits the experimental data almost perfectly. However, it is not explicit in the terminal velocity. The available explicit correlations do not fit the experimental data well. The present paper shows that a simple and precise explicit correlation can be developed ifCDis related to the Archimedes instead of the Reynolds number. The precision of the correlation proposed is similar to that of the Turton and Levenspiel (1986), while it is explicit in the terminal velocity. On the basis of this correlation, a model is proposed to calculate the drag coefficients and the terminal velocities of free falling or rising spherical particles in an infinite fluid as well as gas bubbles with any volume and shape rising in a contaminated liquid.
点击下载:
PDF (302KB)
返 回