ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Dynamic shape and wall correction factors of cylindrical particles falling vertically in a Newtonian liquid

Jaroslav Strnadel, Bedřich Šiška, and Ivan Machač

Institute of Environmental and Chemical Engineering, University of Pardubice, Studentská 573, 532 10, Pardubice, Czech Republic

E-mail: Ivan.Machac@upce.cz

Abstract: Results of numerical calculations of dynamic shape and wall correction factors for the flow of a Newtonian fluid over a vertically oriented cylindrical particle in a cylindrical tube are reported. Mathematical model of the flow was solved using the finite element method by means of the COMSOL Multiphysics software. Dependences of the shape factor on the cylinder aspect ratio and of the wall correction factor, F_W, on the ratio of the cylindrical particle diameter to the tube diameter, and on the aspect ratio were obtained. Numerical dependences were approximated by simple relationships suitable for dynamic shape and wall correction factors prediction.

Keywords: cylindrical particles – free fall – Newtonian fluid – dynamic shape factor – wall effects

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-012-0285-5

Chemical Papers 67 (9) 1245–1249 (2013)