Direct Numerical Simulation of a Thin Shear-Driven Water Film under Turbomachinery Relevant Conditions

Direct Numerical Simulation of a Thin Shear-Driven Water Film under Turbomachinery Relevant 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 Direct Numerical Simulation of a Thin Shear-Driven Water Film under Turbomachinery Relevant Conditions Eric Nied, Jonas H. Ruesch, Markus Schatz, Bernhard Weigand This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5789662/v2 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 04 Sep, 2025 Read the published version in CEAS Aeronautical Journal → Version 2 posted You are reading this latest preprint version Show more versions Abstract Thin shear-driven films have many applications. They appear on airfoils of aircrafts or wind turbines during heavy rain. They also appear in stationary gas turbines, when fogging/high fogging is applied. Well defined film models and coupling conditions between the gas flow and the film flow are necessary to consider the influence of the liquid films in these applications. In this study, a setup of a Direct Numerical Simulation (DNS) is presented, which will be used to investigate thin liquid films. First, a film model from the literature is presented and its coupling conditions between the gas flow and the film flow are discussed. Then, the numerical setup and boundary conditions are explained, which are used to investigate the coupling conditions. A simulation with a film Reynolds number of 50 and a gas Reynolds number (defined with the boundary layer thickness) of 54000 is performed. The numerical prediction is accomplished with the in-house program Free Surface 3D (FS3D), which uses the Volume of Fluid (VOF) method for the interface tracking and the Piecewise Linear Interface Calculation (PLIC) for the surface reconstruction. Instantaneous and time averaged results of the volume fraction, velocity field and shear stress are presented. The results show that DNS enables the investigation of the coupling conditions at the gas-liquid interface. Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 04 Sep, 2025 Read the published version in CEAS Aeronautical Journal → Version 2 posted You are reading this latest preprint version Show more versions 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-5789662","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":474935852,"identity":"bd6af3c6-3d37-42de-ae70-1c5bb7908a2b","order_by":0,"name":"Eric Nied","email":"data:image/png;base64,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","orcid":"","institution":"University of Stuttgart","correspondingAuthor":true,"prefix":"","firstName":"Eric","middleName":"","lastName":"Nied","suffix":""},{"id":474935853,"identity":"a877d053-26d7-4815-8ca8-c25ed2a0ceae","order_by":1,"name":"Jonas H. 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