Mathematical modelling of permeability reduction in porous media caused by CO2 hydrate formation using microscopic phase-field model simulations

2021 ◽  
Author(s):  
Alan Junji Yamaguchi ◽  
Toru Sato ◽  
Ayumu Nono ◽  
Shawn Adrian Schneidereit ◽  
Takaomi Tobase
Keyword(s):  
Porous Media ◽  
Mathematical Modelling ◽  
Phase Field ◽  
Field Model ◽  
Hydrate Formation ◽  
Phase Field Model ◽  
Permeability Reduction ◽  
Model Simulations ◽  
Microscopic Phase Field Model

A two-scale iterative scheme for a phase-field model for precipitation and dissolution in porous media

2021 ◽  
Vol 396 ◽  
pp. 125933
Author(s):  
Manuela Bastidas Olivares ◽  
Carina Bringedal ◽  
Iuliu Sorin Pop
Keyword(s):  
Porous Media ◽  
Phase Field ◽  
Field Model ◽  
Iterative Scheme ◽  
Phase Field Model

The Simulation of Stress-Induced Phase Transition of L10 Re-Precipitation Based on Microscopic Phase-Field Model

2011 ◽  
Vol 689 ◽  
pp. 226-234
Author(s):  
Yong Xin Wang ◽  
Yong Biao Wang ◽  
Zheng Chen ◽  
Yan Li Lu
Keyword(s):  
Phase Transition ◽  
Induction Period ◽  
Phase Field ◽  
Field Model ◽  
Large Range ◽  
Phase Field Model ◽  
Precipitation Process ◽  
Phase Precipitation ◽  
Microscopic Phase Field Model ◽  
Precipitation Phase

It is common that the pre-precipitation phase with kinetics advantage is found during non-equilibrium transformation. The continuously changed stress in the transformation increases the complication of precipitation process. The stress induces Ll0pre-precipitation phase in Ni75-Al12.5-V12.5alloy is studied by microscope phase-field model in this paper. It is particularly show that Ll2phase precipitates directly without stress. There is no Ll0phase to be found in the disordered matrix. Oppositely, Ll0phase precipitates firstly with stress, and then it turns into Ll2phase. When stress is less, either or both above situations are observed. While stress is stronger, a large range of Ll0phase precipitates firstly. Then a part of it dissolves. The rest turns into Ll2phase. The precipitation of pre-precipitation phase accelerates the precipitation process. The larger the stress and the more Ll0phase precipitation, the longer it exists and the shorter the induction period is.

Phase field model simulations of hydrogel dynamics under chemical stimulation

2011 ◽  
Vol 289 (5-6) ◽  
pp. 513-521 ◽  
Author(s):  
Daming Li ◽  
HongLiu Yang ◽  
Heike Emmerich
Keyword(s):  
Phase Field ◽  
Field Model ◽  
Phase Field Model ◽  
Chemical Stimulation ◽  
Model Simulations

Microscopic Phase Field Study on the Kinetics of Order-Disorder Transition of APDBs Formed between DO22 Phases during Stress Aging

2014 ◽  
Vol 789 ◽  
pp. 530-535 ◽  
Author(s):  
Ming Yi Zhang ◽  
Guang Quan Yue ◽  
Jia Zhen Zhang ◽  
Kun Yang ◽  
Zheng Chen
Keyword(s):  
Phase Field ◽  
Field Model ◽  
Domain Boundary ◽  
Phase Field Model ◽  
Antiphase Domain ◽  
Phase Layer ◽  
Disorder Transition ◽  
Disordered Phase ◽  
Kinetics Of ◽  
Microscopic Phase Field Model

Kinetics of order-disorder transition at antiphase domain boundary (APDB) formed between DO22 (Ni3V) phases during stress aging was investigated using microscopic phase field model. The results demonstrated that whether order-disorder transition happens or not depends on the atomic structure of the APDB. Accompanied with the depletion of V and enrichment of Ni and Al, order-disorder transition happened at the APDB (001)//(002). Whereas at the APDB {100}·1⁄2[100], which remains ordered with temporal evolution, Ni and Al enrich and V depletes. Composition evolution of APDB with order-disorder transition favors the nucleation of the L12 and disordered phase. Some of the grains grew bigger while the others disappeared, accompanying the formation of disordered phase layer during order-disorder transition of APDBs, and the order-disorder transition of APDBs can be considered as accompanying process of coarsening of ordered domain phases and growth of disordered phases.

Microscopic Phase Field Study on the Site Preference of Al in Ni3V: Coordination Geometry Effect

2011 ◽  
Vol 689 ◽  
pp. 149-153 ◽  
Author(s):  
Ming Yi Zhang ◽  
Zheng Chen ◽  
Xiao Li Fan ◽  
Yong Xin Wang ◽  
Yan Li Lu
Keyword(s):  
Field Study ◽  
Phase Field ◽  
Field Model ◽  
Phase Field Model ◽  
Alloying Elements ◽  
Diffusion Equations ◽  
Site Preference ◽  
Coordination Geometry ◽  
Geometry Effect ◽  
Microscopic Phase Field Model

The site occupation behavior of Al in Ni3V phase with a DO22structure in Ni75AlxV25-xalloy was studied using the microscopic phase-field model which is based on the microscopic diffusion equations. Attribute to the coordination geometry effects, the concentration of Al are non-equal on the two non-equivalent Ni sites, and Al prefers to occupy the NiⅠsites. However, the Al does not prefer to occupy both of the two Ni sites, because the Al concentration on V site is intermediately between that on NiⅠand NiⅡsite. The calculated ordering energies suggest that the site preference of alloying elements are all energetic favorable.

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