Simulation of the Passive Separation of Miscible Fluid Mixtures in Two-Dimensional Micro-Channels with Uneven Wetting Conditions

Simulation of the Passive Separation of Miscible Fluid Mixtures in Two-Dimensional Micro-Channels with Uneven Wetting Conditions | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Simulation of the Passive Separation of Miscible Fluid Mixtures in Two-Dimensional Micro-Channels with Uneven Wetting Conditions Mohanad Radhi, Derek Tretheway This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6623340/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 11 You are reading this latest preprint version Abstract This work focuses on passive separation of miscible mixtures through the surface forces in microchannels. Two fluids of physical properties imitating those of water and ethanol are investigated using the multi-range multi-components Shan-Chen Lattice Boltzmann Method (LBM) for a 2D channel. The variations of the fluid-fluid and fluid-solid interaction coefficients of both fluids, the relaxation times, and the spacing between the walls are examined under static conditions. The uneven interactions are considered with static as well as flow conditions. Because the surface forces are of intermolecular nature, their spacial range is short and did not exceed \(30 nm\) in our study. Therefore, we added solid posts distributed in patterns. The addition of these features enhanced the density jumps significantly between the upper and lower halves of the channel. Microchannel Interfacial Force Binary Fluid Mixture Uneven Wetting Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Editorial decision: Revision requested 08 Jul, 2025 Reviews received at journal 01 Jul, 2025 Reviewers agreed at journal 18 Jun, 2025 Reviews received at journal 09 Jun, 2025 Reviewers agreed at journal 02 Jun, 2025 Reviewers agreed at journal 02 Jun, 2025 Reviewers agreed at journal 02 Jun, 2025 Reviewers invited by journal 02 Jun, 2025 Editor assigned by journal 11 May, 2025 Submission checks completed at journal 11 May, 2025 First submitted to journal 08 May, 2025 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-6623340","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":466022147,"identity":"9bc19efe-9abf-4659-a68e-6849a23c4ac1","order_by":0,"name":"Mohanad Radhi","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA6ElEQVRIiWNgGAWjYFACHhDBbAAkGA98AIskgBFRWhgOzkggVcthHpgWfEB3Ru7BzwU11sb80w4fOGz74zADP3uOAcODMtxazG7kJUvPOJZuJnE7LeFwTsJhBsmeNwYMCefwackxkOZhO2zDcDvHAKzFACjCkNiGV4vxb55/h23kb+d/OGwB1GJPhBYzad62w2YGt3MYDjOAbJEgpOXMGzNr3r50Y8PbaQYHe9LSeSTOPCs4gNcvx3OMb/N8szacdzv54YMfNtZy/O3JGx/+wBNiGAAcTQcY2EjQAgVkaBkFo2AUjIJhCwB2KFQgr7ro0gAAAABJRU5ErkJggg==","orcid":"","institution":"University of Tikrit","correspondingAuthor":true,"prefix":"","firstName":"Mohanad","middleName":"","lastName":"Radhi","suffix":""},{"id":466022148,"identity":"8d1d2606-5e50-4ed3-83eb-50f91525ed6f","order_by":1,"name":"Derek Tretheway","email":"","orcid":"","institution":"Portland State University","correspondingAuthor":false,"prefix":"","firstName":"Derek","middleName":"","lastName":"Tretheway","suffix":""}],"badges":[],"createdAt":"2025-05-08 20:23:10","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-6623340/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-6623340/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":83920076,"identity":"9b726f80-52fc-4e87-9d57-386a856ce4fa","added_by":"auto","created_at":"2025-06-04 13:28:45","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1834870,"visible":true,"origin":"","legend":"","description":"","filename":"SpringerNatureLaTeXTemplateMiscible3.pdf","url":"https://assets-eu.researchsquare.com/files/rs-6623340/v1_covered_ae9fbd9e-77b2-4195-8305-08057432ad7b.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Simulation of the Passive Separation of Miscible Fluid Mixtures in Two-Dimensional Micro-Channels with Uneven Wetting Conditions","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":true,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"discover-fluid-mechanics","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"","sideBox":"Learn more about [Discover Fluid Mechanics](https://link.springer.com/journal/44369)","snPcode":"44369","submissionUrl":"https://submission.springernature.com/new-submission/44369/3","title":"Discover Fluid Mechanics","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"stoa","reportingPortfolio":"Discover Series","inReviewEnabled":true,"inReviewRevisionsEnabled":true},"keywords":"Microchannel, Interfacial Force, Binary Fluid Mixture, Uneven Wetting","lastPublishedDoi":"10.21203/rs.3.rs-6623340/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-6623340/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThis work focuses on passive separation of miscible mixtures through the surface forces in microchannels. 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