Predicting the drag coefficient and settling velocity of spherical particles

• Published in: Powder technology 2013-05, Vol.239, p.12-20
• Main Authors: Terfous, A., Hazzab, A., Ghenaim, A.
• Format: Article
• Language: English
• Subjects: Applied sciences; Chemical engineering; Computational method; Drag coefficient; Engineering Sciences; Exact sciences and technology; Fluid at rest; Liquid-liquid and fluid-solid mechanical separations; Miscellaneous; Other; prediction; Settling; Settling velocity; Solid-solid systems; Spherical particle
• ISSN: 0032-5910; 1873-328X
• DOI: 10.1016/j.powtec.2013.01.052

This paper presents a relationship for calculating the drag coefficient of a spherical particle. The results obtained were validated using experimental data, including comparison with results from other relationships such as certainty analysis. The validation indicated that the proposed relationship is easier to apply and produces the best results. In addition, a relationship based on the characteristics of both the fluid and the particles was established to calculate directly the settling velocity of a spherical particle in a fluid at rest. The settling velocity values obtained with the proposed relationship were validated using experimental data and the model proved to be reliable and precise. A new relationship for calculating the drag coefficient of a spherical particle is presented here. The results obtained were validated using experimental data. In addition, a relationship based on the characteristics of both the fluid and the particles was established to calculate directly the settling velocity of a spherical particle in a fluid at rest. The settling velocity values obtained with the proposed relationship were validated using experimental data. [Display omitted] ► We present a relationship for calculating the drag coefficient of a spherical particle. ► The results obtained were validated using experimental data. ► The proposed model is easier to apply and produce good results.