Development of high-resolution 2D-LIF temperature system: application on a non-isothermal turbulent jet

Development of high-resolution 2D-LIF temperature system: application on a non-isothermal turbulent jet | 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 Development of high-resolution 2D-LIF temperature system: application on a non-isothermal turbulent jet Vincent Helfer, Benjamin Cariteau, Philippe Fillion, Adrien Toutant This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4837409/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 Laser-induced fluorescence (LIF) visualization techniques are used to quantify a wide range of aqueous flows, whether monophasic or two-phase. Depending on the resolution of the cameras used, these techniques generate a large amount of data that can be used to further study the behavior of a flow. The techniques use a laser sheet to stimulate fluorescent dyes seeded in the flow, resulting in fields of local measurements, depending on the thickness of the laser sheet, and offering a variety of possibilities for comparison with different digital resolution tools. Specifically, this paper presents a two-dye LIF (2D-LIF) temperature measurement system that exploits the variation of the photo-luminescence properties of two different fluorescent dyes with temperature, allowing quantitative measurement from the recorded fluorescence intensity. The system consists of high-resolution cameras (65 Mpxl) and a pulsed Nd-YAG laser, providing instantaneous and spatially resolved measurements. The present study describes the development of the 2D-LIF system and explains the choice of experimental setups for the most accurate and precise measurements. It then applies the system to measure the temperatures of several non-isothermal and turbulent jets. Time-averaged measurements are presented according to the physical model proposed by Morton et al. (1956), calibrated here with Particle Image Velocimetry (PIV) measurements. Radial turbulent temperature fluctuation distributions are estimated and compared in accordance with the literature. 2D-LIF non-isothermal flow turbulent jet high-resolution temperature measurement turbulent fluctuations 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. 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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-4837409","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":345433805,"identity":"80a1fc66-71ae-43e0-bb60-19528cb6c0b5","order_by":0,"name":"Vincent Helfer","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA50lEQVRIie3OsQrCMBCA4QsFu1S72kVfIUVQBNFXiRR8BscegbpUXNs3cXBI6dCl6Co4aBGc66agYBUVp7SjQ/4MyQ0fFwCV6h/T3jcFzc0BBq8hr0BocQgGAJPnRIIKu74kLic0qUf5eXmDno7onlebtqkLwqcyEjccK0wp9P0IMTjt7NBnBFMJsbjR1epe8bHteHY0xI5RwfTMLSP3J9lnyG9izUabA0EZMbWCkNcWghyEYLTJSknHmnsdg6ZjRF84drDNUEpqZmrnV6/VokkcuRcxbJsLJ5KST8bPm1QBKpVKpZL1ANrcT8tMr58nAAAAAElFTkSuQmCC","orcid":"","institution":"Atomic Energy and Alternative Energies Commission","correspondingAuthor":true,"prefix":"","firstName":"Vincent","middleName":"","lastName":"Helfer","suffix":""},{"id":345433806,"identity":"ee7cb6e0-8017-4b1b-92b6-82790afd23b4","order_by":1,"name":"Benjamin Cariteau","email":"","orcid":"","institution":"Atomic Energy and Alternative Energies Commission","correspondingAuthor":false,"prefix":"","firstName":"Benjamin","middleName":"","lastName":"Cariteau","suffix":""},{"id":345433807,"identity":"350a01a0-8a90-4d07-9aee-af828f9feac0","order_by":2,"name":"Philippe Fillion","email":"","orcid":"","institution":"Atomic Energy and Alternative Energies Commission","correspondingAuthor":false,"prefix":"","firstName":"Philippe","middleName":"","lastName":"Fillion","suffix":""},{"id":345433810,"identity":"9d9a1e07-cf77-4b14-b170-e27f676c2085","order_by":3,"name":"Adrien Toutant","email":"","orcid":"","institution":"Laboratoire Procédés, Matériaux et Energie Solaire","correspondingAuthor":false,"prefix":"","firstName":"Adrien","middleName":"","lastName":"Toutant","suffix":""}],"badges":[],"createdAt":"2024-07-31 17:53:30","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-4837409/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-4837409/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":65336302,"identity":"2274324f-dc02-4080-9c83-2b5817934c58","added_by":"auto","created_at":"2024-09-26 08:17:39","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":9876762,"visible":true,"origin":"","legend":"","description":"","filename":"PaperHELFER.pdf","url":"https://assets-eu.researchsquare.com/files/rs-4837409/v1_covered_53cbda7c-dd01-4355-bc87-26e767d629bd.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Development of high-resolution 2D-LIF temperature system: application on a non-isothermal turbulent jet","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":"2D-LIF, non-isothermal flow, turbulent jet, high-resolution, temperature measurement, turbulent fluctuations","lastPublishedDoi":"10.21203/rs.3.rs-4837409/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4837409/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eLaser-induced fluorescence (LIF) visualization techniques are used to quantify a wide range of aqueous flows, whether monophasic or two-phase. 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