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MIT EARTH RESOURCES LABORATORY ANNUAL FOUNDING MEMBERS MEETING 2019 DEM modeling of coupled multiphase flow and granular mechanics: Wettability control on fracture patterns
MIT EARTH RESOURCES LABORATORY ANNUAL FOUNDING MEMBERS MEETING 2019
DEM modeling of coupled multiphase flow and
granular mechanics:
Wettability control on fracture patterns
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EXPERIMENTAL SET-UP
Motivation Trojer et al. (in review).
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IMPACT OF WETTING ON FRACTURING OF GRANULAR MEDIA
Motivation Trojer et al. (in review).
silicon oil - glycerol water – silicon oil water – fluorinated oil
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IMPACT OF WETTING ON FRACTURING OF GRANULAR MEDIA
Motivation Trojer et al. (in review).
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Methodology
DEM for particle movements
(PFC)
Ø Delaunay triangulation
Ø Update particle positions
PN for interface advancement
(MATLAB)
particle position
Ø Pressure & flow rate
Ø Pressure force
pressure force on each particle
COUPLING SCHEME FOR TWO-PHASE FLOW MODEL
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TWO-PHASE FLOW: MOVING CAPACITOR DYNAMIC MODEL
MethodologyPrimkulov et al. (in review)
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IMPACT OF WETTABILITY ON FRACTURE PATTERNS
Phase diagram: fracture morphology
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Videos: imbibition displacement (θ = 46°)
Pressure force (N)
interface morphology pressure force pressure field
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Θ = 65°, 75°, 120°
Videos: capillary entry pressure evolution
Θ = 65° Θ = 75° Θ = 120°
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TOTAL BALL DISPLACEMENT FIELD FROM IMBIBITION – NEUTRAL – DRAINAGE DISPLACEMENTS
Phase diagram: total ball displacement field
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JAMMING TRANSITION & FRACTURE INITIATION MOMENTS
Jamming phase diagram
Majmudar, et al. (2007), PRL.
Henkes, S., & Chakraborty, B. (2005) PRL.
Θ = 90°
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JAMMING TRANSITION – FORCE CHAIN “LOCK-UP” – FRACTURE INITIATION (Θ = 90°)
Videos (Θ = 90°): force chain evolution
interface morphologycontact force network
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ConclusionIMPACT OF WETTABILITY ON FRACTURING PATTERNS
• Three regimes during injection
• Pore invasion• Cavity expansion• Fracturing
• Non-monotonic fracture patterns
• Wettability influences Tc
• Jamming transition • Fracturing initiation• Force chain “lock-up”
