Flow split characterization of two immiscible phases with different wettability scenarios: a numerical investigation using a coupled Cahn-Hilliard and Navier-Stokes system

Handle URI:
http://hdl.handle.net/10754/626439
Title:
Flow split characterization of two immiscible phases with different wettability scenarios: a numerical investigation using a coupled Cahn-Hilliard and Navier-Stokes system
Authors:
Bao, Kai; Salama, Amgad; Sun, Shuyu ( 0000-0002-3078-864X )
Abstract:
Numerical investigation of flow branching of two-phase immiscible fluids in a Y-shaped, planner channel is conducted by solving the coupled Cahn-Hilliard and Naiver-Stokes system with finite element method. In this system a horizontal channel is branched into two identical and symmetric branches with the walls of the channels assigned several different wettability values. The studied scenarios consider a blob of one phase initially encompassed by the other phase. When an applied pressure difference induces flow, it is found that the motion of the blob in the two branches is significantly influenced by the wettability conditions at the channel walls. For the scenarios in which symmetric wettability configurations are applied, the blob divides equally among the two branches. For all the other scenarios in which the wettability configurations are asymmetric, the blob splits unequally. Comparisons between the different scenarios are performed in terms of the volume of the blob in each branch to investigate the percentage of the blob volume moving in each branch. In addition, we also considered the effect of the flow rate on the branching scenarios. In this work it is demonstrated that even though the pressure gradient is the same among the two symmetric branches, the phases partition differently when asymmetric wettability conditions are applied. The significance of this work may be that it provides evidences that relative permeability (a concept that has been introduced in the study of multiphase flow in porous media) may be more complex than just a mere scalar quantity function of saturation. It also highlights the importance of including the effects of wettability conditions in capillary pressure relationships
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Earth Science and Engineering Program; King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, KSA
Citation:
Bao K, Salama A, Sun S (2017) Flow split characterization of two immiscible phases with different wettability scenarios: a numerical investigation using a coupled Cahn-Hilliard and Navier-Stokes system. International Journal of Multiphase Flow. Available: http://dx.doi.org/10.1016/j.ijmultiphaseflow.2017.12.016.
Publisher:
Elsevier BV
Journal:
International Journal of Multiphase Flow
Issue Date:
23-Dec-2017
DOI:
10.1016/j.ijmultiphaseflow.2017.12.016
Type:
Article
ISSN:
0301-9322
Additional Links:
http://www.sciencedirect.com/science/article/pii/S0301932217304020
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Earth Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorBao, Kaien
dc.contributor.authorSalama, Amgaden
dc.contributor.authorSun, Shuyuen
dc.date.accessioned2017-12-27T13:11:15Z-
dc.date.available2017-12-27T13:11:15Z-
dc.date.issued2017-12-23en
dc.identifier.citationBao K, Salama A, Sun S (2017) Flow split characterization of two immiscible phases with different wettability scenarios: a numerical investigation using a coupled Cahn-Hilliard and Navier-Stokes system. International Journal of Multiphase Flow. Available: http://dx.doi.org/10.1016/j.ijmultiphaseflow.2017.12.016.en
dc.identifier.issn0301-9322en
dc.identifier.doi10.1016/j.ijmultiphaseflow.2017.12.016en
dc.identifier.urihttp://hdl.handle.net/10754/626439-
dc.description.abstractNumerical investigation of flow branching of two-phase immiscible fluids in a Y-shaped, planner channel is conducted by solving the coupled Cahn-Hilliard and Naiver-Stokes system with finite element method. In this system a horizontal channel is branched into two identical and symmetric branches with the walls of the channels assigned several different wettability values. The studied scenarios consider a blob of one phase initially encompassed by the other phase. When an applied pressure difference induces flow, it is found that the motion of the blob in the two branches is significantly influenced by the wettability conditions at the channel walls. For the scenarios in which symmetric wettability configurations are applied, the blob divides equally among the two branches. For all the other scenarios in which the wettability configurations are asymmetric, the blob splits unequally. Comparisons between the different scenarios are performed in terms of the volume of the blob in each branch to investigate the percentage of the blob volume moving in each branch. In addition, we also considered the effect of the flow rate on the branching scenarios. In this work it is demonstrated that even though the pressure gradient is the same among the two symmetric branches, the phases partition differently when asymmetric wettability conditions are applied. The significance of this work may be that it provides evidences that relative permeability (a concept that has been introduced in the study of multiphase flow in porous media) may be more complex than just a mere scalar quantity function of saturation. It also highlights the importance of including the effects of wettability conditions in capillary pressure relationshipsen
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0301932217304020en
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in International Journal of Multiphase Flow. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Multiphase Flow, 23 December 2017. DOI: 10.1016/j.ijmultiphaseflow.2017.12.016. © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectTwo-phase immiscible flowen
dc.subjectCoupled Navier-Stokes and Cahn-Hillarden
dc.subjectMoving contact lineen
dc.subjectFinite element methoden
dc.titleFlow split characterization of two immiscible phases with different wettability scenarios: a numerical investigation using a coupled Cahn-Hilliard and Navier-Stokes systemen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentEarth Science and Engineering Programen
dc.contributor.departmentKing Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, KSAen
dc.identifier.journalInternational Journal of Multiphase Flowen
dc.eprint.versionPost-printen
dc.contributor.institutionSINTEF, Department of Applied Mathematics, Forskningsveien 1, 0373, Oslo, Norwayen
dc.contributor.institutionFaculty of Engineering, University of Regina, Regina, Sk., Canadaen
kaust.authorSun, Shuyuen
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