Sur le volume élémentaire représentatif de la loi de perte de charge d'Ergun

Abstract

Several expressions can be used to predict the pressure drop caused by a viscous incompressible fluid flow through a granular media. These laws are empiricals and are obtained at macroscopic scale. One of these, Ergun's law, is currently used in a local form to modelling the momentum transfer between fluid and solid. There is not a real justification. In these study, the direct simulation of Navier-Stokes Equation is used to calculate pressure drop caused by viscous incompressible fluid flow through a granular media. Some simulations realised for different volume of granular media allow to find a representative elementary volume and prove the local character of the Ergun's law. Copyright © 1999, Éditions Technip.