Drag correlation for dilute and moderately dense fluid-particle systems using the lattice Boltzmann method

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Rüde U, Bogner S, Mohanty S
Zeitschrift: International Journal of Multiphase Flow
Verlag: Elsevier
Jahr der Veröffentlichung: 2015
Band: 68
Seitenbereich: 71-79
ISSN: 0301-9322
Sprache: Englisch


Abstract


This paper presents a numerical study of flow through static random assemblies of monodisperse, spherical particles. A lattice Boltzmann approach based on a two relaxation time collision operator is used to obtain reliable predictions of the particle drag by direct numerical simulation. From these predictions a closure law F(Rep,φ) of the drag force relationship to the bed density φ   and the particle Reynolds number Rep is derived. The present study includes densities φ   ranging from 0.01 to 0.35 with Repranging up to 300, that is compiled into a single drag correlation valid for the whole range. The correlation has a more compact expression compared to others previously reported in literature. At low particle densities, the new correlation is close to the widely-used Wen & Yu – correlation.



Recently, there has been reported a discrepancy between results obtained using different numerical methods, namely the comprehensive lattice Boltzmann study of Beetstra et al. (2007) and the predictions based on an immersed boundary – pseudo-spectral Navier–Stokes approach (Tenneti et al., 2011). The present study excludes significant finite resolution effects, which have been suspected to cause the reported deviations, but does not coincide exactly with either of the previous studies. This indicates the need for yet more accurate simulation methods in the future.



FAU-Autoren / FAU-Herausgeber

Bogner, Simon
Lehrstuhl für Informatik 10 (Systemsimulation)
Rüde, Ulrich Prof. Dr.
Lehrstuhl für Informatik 10 (Systemsimulation)


Zitierweisen

APA:
Rüde, U., Bogner, S., & Mohanty, S. (2015). Drag correlation for dilute and moderately dense fluid-particle systems using the lattice Boltzmann method. International Journal of Multiphase Flow, 68, 71-79. https://dx.doi.org/10.1016/j.ijmultiphaseflow.2014.10.001

MLA:
Rüde, Ulrich, Simon Bogner, and Swati Mohanty. "Drag correlation for dilute and moderately dense fluid-particle systems using the lattice Boltzmann method." International Journal of Multiphase Flow 68 (2015): 71-79.

BibTeX: 

Zuletzt aktualisiert 2018-11-08 um 01:42