Hybrid Modelling of Coupled Pore Fluidsolid Deformation Problems
Abstract
A hybrid formulation for coupled pore fluidsolid deformation problems is proposed. The scheme is a hybrid in the sense that we use a vertex centered finite volume formulation for the analysis of the pore fluid and a particle method for the solid in our model. The pore fluid formally occupies the same space as the solid particles. The size of the particles is not necessarily equal to the physical size of materials. A finite volume mesh for the pore fluid flow is generated by Delaunay triangulation. Each triangle possesses an initial porosity. Changes of the porosity are specified by the translations of the mass centers of particles. Net pore pressure gradients are applied to the particle centers and are considered in the particle momentum balance. The potential of our model is illustrated by means of a simulation of coupled fracture and fluid flow developed in porous rock under biaxial compression condition.
 Publication:

Pure and Applied Geophysics
 Pub Date:
 2000
 DOI:
 10.1007/PL00001066
 Bibcode:
 2000PApGe.157.1889S
 Keywords:

 Key Words: Discrete element method;
 pore fluid flow;
 fracture;
 irregular shape of particles.