Abstract
Flow through a two-scale porous medium is here investigated by a unique comparison between simulations performed with computational fluid dynamics and the boundary element method with microparticle image velocimetry in model geometries.
Highlights
Prediction of porous media flow is straightforward, as it is governed by Darcy’s law
Nordlund et al [2] have shown that Computational Fluid Dynamics (CFD) successfully can be used to calculate the permeability of model cells
ΜPIV will here be applied to study the flow in a two-scale model geometry consisting of an array of parallel fibres placed in a cavity
Summary
Prediction of porous media flow is straightforward, as it is governed by Darcy’s law. The methods are Computational Fluid Dynamics (CFD), the Boundary Element Method (BEM), and microparticle image velocimetry (μPIV) It is suggested how these methods can interplay to produce the best results. Due to its efficiency in very complex geometries (in the BEM only boundaries need to be meshed), the BEM can resolve every fibre and model the detailed microscale flow within the bundles [5, 6]. While in this approach the small scale can be perfectly modelled, it can be difficult to implement 3D effects on the fibre bundle scale as done with CFD. ΜPIV will here be applied to study the flow in a two-scale model geometry consisting of an array of parallel fibres placed in a cavity
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