Show simple item record

dc.contributor.authorSoltanian, Mohamad Reza
dc.contributor.authorMoortgat, Joachim
dc.contributor.authorAmooie, Mohammad Amin
dc.date.accessioned2018-10-01T18:07:09Z
dc.date.available2018-10-01T18:07:09Z
dc.date.issued2018-09
dc.date.submitted2018-07
dc.identifier.issn2470-0045
dc.identifier.issn2470-0053
dc.identifier.urihttp://hdl.handle.net/1721.1/118320
dc.description.abstractWe numerically examine solutal convection in porous media, driven by the dissolution of carbon dioxide (CO[subscript 2]) into water—an effective mechanism for CO[subscript 2] storage in saline aquifers. Dissolution is associated with slow diffusion of free-phase CO[subscript 2] into the underlying aqueous phase followed by density-driven convective mixing of CO[subscript 2] throughout the water-saturated layer. We study the fluid dynamics of CO[subscript 2] convection in the single aqueous-phase region. A comparison is made between two different boundary conditions in the top of the formation: (i) a constant, maximum aqueous-phase concentration of CO[subscript 2], and (ii) a constant, low injection-rate of CO[subscript 2], such that all CO[subscript 2] dissolves instantly and the system remains in single phase. The latter model is found to involve a nonlinear evolution of CO[subscript 2] composition and associated aqueous-phase density, which depend on the formation permeability. We model the full nonlinear phase behavior of water-CO[subscript 2] mixtures in a confined domain, consider dissolution and fluid compressibility, and relax the common Boussinesq approximation. We discover new flow regimes and present quantitative scaling relations for global characteristics of spreading, mixing, and a dissolution flux in two- and three-dimensional media for both boundary conditions. We also revisit the scaling behavior of Sherwood number (Sh) with Rayleigh number (Ra), which has been under debate for porous-media convection. Our measurements from the solutal convection in the range 1500≲Ra≲135000 show that the classical linear scaling Sh ∼ Ra is attained asymptotically for the constant-concentration case. Similarly, linear scaling is recovered for the constant-flux model problem. The results provide a new perspective into how boundary conditions may affect the predictive powers of numerical models, e.g., for both the short-term and long-term dynamics of convective mixing rate and dissolution flux in porous media at a wide range of Rayleigh numbers.en_US
dc.publisherAmerican Physical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1103/PhysRevE.98.033118en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceAmerican Physical Societyen_US
dc.titleSolutal convection in porous media: Comparison between boundary conditions of constant concentration and constant fluxen_US
dc.typeArticleen_US
dc.identifier.citationAmooie, Mohammad Amin, et al. “Solutal Convection in Porous Media: Comparison between Boundary Conditions of Constant Concentration and Constant Flux.” Physical Review E, vol. 98, no. 3, Sept. 2018. © 2018 American Physical Societyen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Chemical Engineeringen_US
dc.contributor.mitauthorAmooie, Mohammad Amin
dc.relation.journalPhysical Review Een_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dc.date.updated2018-09-27T18:00:33Z
dc.language.rfc3066en
dc.rights.holderAmerican Physical Society
dspace.orderedauthorsAmooie, Mohammad Amin; Soltanian, Mohamad Reza; Moortgat, Joachimen_US
dspace.embargo.termsNen_US
dc.identifier.orcidhttps://orcid.org/0000-0003-0871-1520
mit.licensePUBLISHER_POLICYen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record