Computer simulation of evolving capillary bridges in granular media
- 267 Downloads
A numerical method for the simulation of spatially evolving liquid–vapour interfaces in arbitrary two dimensional granular media is presented. Solid- and liquid-phase objects are described by polynomials whose edges evolve according to surface tension forces until a prescribed equilibrium contact angle at three-phase contact points and a constant mean curvature on two-phase contact lines is achieved. The main advantage of the method is the possibility to account for topological transitions (interface coalescence or rupture) and direct calculation of the force acting on solid interfaces due to liquid bridges. The method has been validated by comparing numerical and analytical results for a single pendular liquid bridge and then demonstrated on the simulation of transition from the pendular to funicular and capillary state in a wet particle assembly.
KeywordsLiquid bridge Capillary force Contact angle Surface tension Topology Condensation Drying
Unable to display preview. Download preview PDF.
- 2.Grof, Z., Cook, J., Lawrence, C.J., Štěpánek, F.: The interaction between small clusters of cohesive particles and laminar flow: a coupled DEM/CFD approach. J. Petrol. Sci. Eng. (2006) (submitted)Google Scholar