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Title: Dissipative Particle Dynamics Simulation of Fluid Motion Through An Unsaturated Fracture and Fracture Junction

Abstract

Multiphase fluid motion in unsaturated fractures and fracture networks involves complicated fluid dynamics, which is difficult to model using grid-based continuum methods. In this paper, the application of dissipative particle dynamics (DPD), a relatively new mesoscale method to simulate fluid motion in unsaturated fractures is described. Unlike the conventional DPD method that employs a purely repulsive conservative (non-dissipative) particle–particle interaction to simulate the behavior of gases, we used conservative particle–particle interactions that combine short-range repulsive and long-range attractive interactions. This new conservative particle–particle interaction allows the behavior of multiphase systems consisting of gases, liquids and solids to be simulated. Our simulation results demonstrate that, for a fracture with flat parallel walls, the DPD method with the new interaction potential function is able to reproduce the hydrodynamic behavior of fully saturated flow, and various unsaturated flow modes including thin film flow, wetting and non-wetting flow. During simulations of flow through a fracture junction, the fracture junction can be fully or partially saturated depending on the wetting property of the fluid, the injection rate and the geometry of the fracture junction. Flow mode switching from a fully saturated flow to a thin film flow can also be observed in the fracture junction.

Authors:
; ;
Publication Date:
Research Org.:
Idaho National Laboratory (INL)
Sponsoring Org.:
DOE - EM
OSTI Identifier:
912373
Report Number(s):
INL/JOU-05-00243
Journal ID: ISSN 0021-9991; JCTPAH; TRN: US200801%%806
DOE Contract Number:  
DE-AC07-99ID-13727
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Computational Physics; Journal Volume: 222; Journal Issue: 1
Country of Publication:
United States
Language:
English
Subject:
54 - ENVIRONMENTAL SCIENCES; FRACTURES; GASES; GEOMETRY; HYDRODYNAMICS; SIMULATION; THIN FILMS; Dissipative particle dynamics (DPD); fracture; fracture flow; Smoothed particle hydrodynamics (SPH); weight functions

Citation Formats

Paul Meakin, Moubin Liu, and Hai Huang. Dissipative Particle Dynamics Simulation of Fluid Motion Through An Unsaturated Fracture and Fracture Junction. United States: N. p., 2007. Web.
Paul Meakin, Moubin Liu, & Hai Huang. Dissipative Particle Dynamics Simulation of Fluid Motion Through An Unsaturated Fracture and Fracture Junction. United States.
Paul Meakin, Moubin Liu, and Hai Huang. Thu . "Dissipative Particle Dynamics Simulation of Fluid Motion Through An Unsaturated Fracture and Fracture Junction". United States. doi:.
@article{osti_912373,
title = {Dissipative Particle Dynamics Simulation of Fluid Motion Through An Unsaturated Fracture and Fracture Junction},
author = {Paul Meakin and Moubin Liu and Hai Huang},
abstractNote = {Multiphase fluid motion in unsaturated fractures and fracture networks involves complicated fluid dynamics, which is difficult to model using grid-based continuum methods. In this paper, the application of dissipative particle dynamics (DPD), a relatively new mesoscale method to simulate fluid motion in unsaturated fractures is described. Unlike the conventional DPD method that employs a purely repulsive conservative (non-dissipative) particle–particle interaction to simulate the behavior of gases, we used conservative particle–particle interactions that combine short-range repulsive and long-range attractive interactions. This new conservative particle–particle interaction allows the behavior of multiphase systems consisting of gases, liquids and solids to be simulated. Our simulation results demonstrate that, for a fracture with flat parallel walls, the DPD method with the new interaction potential function is able to reproduce the hydrodynamic behavior of fully saturated flow, and various unsaturated flow modes including thin film flow, wetting and non-wetting flow. During simulations of flow through a fracture junction, the fracture junction can be fully or partially saturated depending on the wetting property of the fluid, the injection rate and the geometry of the fracture junction. Flow mode switching from a fully saturated flow to a thin film flow can also be observed in the fracture junction.},
doi = {},
journal = {Journal of Computational Physics},
number = 1,
volume = 222,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2007},
month = {Thu Mar 01 00:00:00 EST 2007}
}