Modelling of conventionally neutral boundary layers with an explicit algebraic Reynolds stress model

Modelling of conventionally neutral boundary layers with an explicit algebraic Reynolds stress model | 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 Modelling of conventionally neutral boundary layers with an explicit algebraic Reynolds stress model Mads Baungaard, Stefan Wallin This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7989013/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract An explicit algebraic Reynolds stress model (EARSM) is tested for the simulation of conventionally neutral boundary layers (CNBLs) with varying capping inversion strengths. Good agreement of first- and second-order statistics with reference large-eddy simulations (LESs) are obtained, and the model is also able to capture anisotropy of velocity variances and non-zero horizontal heat fluxes, which cannot be predicted with traditional eddy-viscosity models (EVMs). No further tuning was made to the EARSM, which demonstrates its generality. Some deviations between the EARSM and LES were observed for the horizontal heat fluxes and the half temperature variance in the capping inversion layer, and a detailed budget analysis of the latter revealed that this is related to the modelling of the half temperature variance dissipation. Conventionally neutral atmosphere Reynolds-stress model Turbulence modelling Single-column model Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted 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. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. 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-7989013","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":538395185,"identity":"f854232a-bf9c-4f29-9846-b6a2ca8f0b5e","order_by":0,"name":"Mads Baungaard","email":"data:image/png;base64,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","orcid":"","institution":"University of Oxford","correspondingAuthor":true,"prefix":"","firstName":"Mads","middleName":"","lastName":"Baungaard","suffix":""},{"id":538395186,"identity":"6751dce1-d26d-435f-9c2b-5b69963cce74","order_by":1,"name":"Stefan Wallin","email":"","orcid":"","institution":"KTH Royal Institute of Technology","correspondingAuthor":false,"prefix":"","firstName":"Stefan","middleName":"","lastName":"Wallin","suffix":""}],"badges":[],"createdAt":"2025-10-30 11:53:13","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-7989013/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-7989013/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":95746296,"identity":"784408e5-7e40-4496-b266-e636302932db","added_by":"auto","created_at":"2025-11-12 14:48:27","extension":"json","order_by":0,"title":"","display":"","copyAsset":false,"role":"acdc-reference","size":4166,"visible":true,"origin":"","legend":"","description":"","filename":"a8511712f34a4521af52d3800d377895.json","url":"https://assets-eu.researchsquare.com/files/rs-7989013/v1/e841a3dc91dbb9fe845b0fef.json"},{"id":97142259,"identity":"1733bd99-7ae2-4805-abe4-db180c26d25d","added_by":"auto","created_at":"2025-12-01 10:07:28","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":547002,"visible":true,"origin":"","legend":"","description":"","filename":"251030BLM2025earsmCNBL.pdf","url":"https://assets-eu.researchsquare.com/files/rs-7989013/v1_covered_a13f2b67-6ed4-4d8d-bdaf-9dda96a6cb13.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Modelling of conventionally neutral boundary layers with an explicit algebraic Reynolds stress model","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"Conventionally neutral atmosphere, Reynolds-stress model, Turbulence modelling, Single-column model","lastPublishedDoi":"10.21203/rs.3.rs-7989013/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-7989013/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"An explicit algebraic Reynolds stress model (EARSM) is tested for the simulation of conventionally neutral boundary layers (CNBLs) with varying capping inversion strengths. 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