Abstract
Abstract We present simulations and experiments of drainage processes in a micro-model. A direct numerical simulation is introduced which is capable of describing wetting phenomena on the pore scale. A numerical smoothed particle hydrodynamics model was developed and used to simulate the two-phase flow of immiscible fluids. The experiments were performed in a micro-model which allows the visualization of interface propagation in detail. We compare the experiments and simulations of a quasistatic drainage process and pure dynamic drainage processes. For both, simulation and experiment, the interfacial area and the pressure at the inflow and outflow are tracked. The capillary pressure during the dynamic drainage process was determined by image analysis.
Highlights
We present a comparison between direct numerical simulations of immiscible two-phase flow in a porous structure based on smoothed particle hydrodynamics (SPH) and the results obtained from micro-model experiments
First SPH simulations of multi-phase flow in porous structures on, the pore scale have been performed by Tartakovsky and Meakin (2006) and Tartakovsky et al (2015)
The Continuum Surface Force model (CSF)/contact line force model (CLF) model in the SPH simulations was able to predict a flow path in the dynamic drainage process which is very close to the one found in the experiment (Fig. 10)
Summary
We present a comparison between direct numerical simulations of immiscible two-phase flow in a porous structure based on smoothed particle hydrodynamics (SPH) and the results obtained from micro-model experiments. First SPH simulations of multi-phase flow in porous structures on, the pore scale have been performed by Tartakovsky and Meakin (2006) and Tartakovsky et al (2015). University of Manchester, Manchester, UK like a capillary rise. The need for an experimental work where a number of capillaries, like a porous structure, would be used became evident. Both quasi-static and dynamic drainage experiments were performed in a poly-dimethylsiloxane (PDMS) micro-model (Karadimitriou et al 2012). The dynamic drainage experiments were performed under constant pressure conditions. The acquired images were stored in a computer for further processing (Karadimitriou et al 2013)
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