New simple correlation formula for the drag coefficient of non-spherical particles

A simple correlation formula for the standard drag coefficient (i.e. a single stationary particle in a uniform flow) of arbitrary shaped particles is established using a large number of experimental data from the literature and a comprehensive numerical study [A. Hölzer, M. Sommerfeld, IUTAM Symposium on Computational Approaches to Multiphase Flow, Springer, 2006]. This new correlation formula accounts for the particle orientation over the entire range of Reynolds numbers up to the critical Reynolds number. Such a correlation may be easily used in the frame of Lagrangian computations where also the particle orientation along the trajectory is computed.

Graphical abstractA simple correlation formula for the drag coefficient of arbitrary shaped particles is established using a large number of experimental data from the literature and a comprehensive numerical study. This new correlation accounts for particle orientation over the entire range of Reynolds numbers up to the critical one. The comparison of the correlation shows good agreement with experiments e.g. spheres and isometric particles (figure).Figure optionsDownload full-size imageDownload as PowerPoint slide