Computational Analysis of Bulb-Shape Ribs Roughened Absorber Plate of Solar Air Heater

Computational Analysis of Bulb-Shape Ribs Roughened Absorber Plate of Solar Air Heater | 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 Computational Analysis of Bulb-Shape Ribs Roughened Absorber Plate of Solar Air Heater Swati Mor, Basant Singh Sikarwar, Niraj Kumar, sachin Singh Gautam This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-3946086/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 In this work, thermo-hydrodynamic simulation was carried out for bulb-shaped ribs roughened absorbing surface of solar air heater at 1kW/m 2 for and various Reynolds numbers. Primarily, sensitivity analysis of turbulent models was carried for flow over the surface, and it observed that RNG k - \(\epsilon\) model results is more closed with respect to Dittus-Boelter equation. After selection of appropriate turbulence model, simulations were carried out on a bulb-shape rib and other shapes of roughened ribs surface. This study reveals that absorber bulb shaped ribs roughened surface has at least two times more performance improvement factor (Nu/ f ) as compared to the other ribbed shape roughened surface. Eventually, the Nusselt number and Coefficient friction for bulb shaped ribs roughened surface were correlated in terms of Reynolds number (Re) and relative roughness ( β ). These correlations are substantial for designing solar air heating systems for bulb-shaped ribs roughened as absorbing surface. Solar air heater bulb-shaped ribs absorber plate thermal efficiency performance enhancement factor 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-3946086","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":274046160,"identity":"7db57157-b828-4ec7-bddd-2805718be0fd","order_by":0,"name":"Swati Mor","email":"","orcid":"","institution":"Amity University","correspondingAuthor":false,"prefix":"","firstName":"Swati","middleName":"","lastName":"Mor","suffix":""},{"id":274046161,"identity":"53e73fb5-b9a6-48b3-b3a5-7fdb7d5bf0cb","order_by":1,"name":"Basant Singh Sikarwar","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA4klEQVRIiWNgGAWjYBACAyA+2ABmMh+AcGEkEVrYEoBcA+K0MEK08BjAVOPXYs5//OHBGTX3Evtnn/n46UbBn8QG9uZtEvi0WM7IMTi44Vhx4oxzuZulcwwMEht4jpXh1WJwg4fh4AO2hNyGM7wbIFokcszwazl//MHBB/8Scuef4Xn8G6xF/g0BLQcSDA5ubEvI3XCGhw1qCw9+LWC/zOxLqN94hs3MOsfA2LiNJ63YAp8WYIg9/tjzLcFY7gzz49s5f+Rk+9kPb7yBTwsGcGwjSTkI2JOsYxSMglEwCoY9AADGilBlUxc5JwAAAABJRU5ErkJggg==","orcid":"","institution":"Amity University","correspondingAuthor":true,"prefix":"","firstName":"Basant","middleName":"Singh","lastName":"Sikarwar","suffix":""},{"id":274046162,"identity":"d63c7b1d-6128-4d71-a9fa-21c7bace34f8","order_by":2,"name":"Niraj Kumar","email":"","orcid":"","institution":"Amity University","correspondingAuthor":false,"prefix":"","firstName":"Niraj","middleName":"","lastName":"Kumar","suffix":""},{"id":274046163,"identity":"566cb4f7-872f-432e-8734-fc42810e0aff","order_by":3,"name":"sachin Singh Gautam","email":"","orcid":"","institution":"Indian Institute of Technology","correspondingAuthor":false,"prefix":"","firstName":"sachin","middleName":"Singh","lastName":"Gautam","suffix":""}],"badges":[],"createdAt":"2024-02-10 14:16:45","currentVersionCode":1,"declarations":{"humanSubjects":false,"vertebrateSubjects":false,"conflictsOfInterestStatement":true,"humanSubjectEthicalGuidelines":false,"humanSubjectConsent":false,"humanSubjectClinicalTrial":false,"humanSubjectCaseReport":false,"vertebrateSubjectEthicalGuidelines":false},"doi":"10.21203/rs.3.rs-3946086/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-3946086/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":53401476,"identity":"ca703742-3a34-4539-9421-dbecfc280635","added_by":"auto","created_at":"2024-03-25 14:36:55","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1229971,"visible":true,"origin":"","legend":"","description":"","filename":"SwatiJournalPaperFinal.pdf","url":"https://assets-eu.researchsquare.com/files/rs-3946086/v1_covered_4db9cb7d-4471-44c1-81fc-adf7fe708e8f.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Computational Analysis of Bulb-Shape Ribs Roughened Absorber Plate of Solar Air Heater","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":"Solar air heater, bulb-shaped ribs, absorber plate, thermal efficiency, performance enhancement factor","lastPublishedDoi":"10.21203/rs.3.rs-3946086/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-3946086/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eIn this work, thermo-hydrodynamic simulation was carried out for bulb-shaped ribs roughened absorbing surface of solar air heater at 1kW/m\u003csup\u003e2\u003c/sup\u003e for and various Reynolds numbers. Primarily, sensitivity analysis of turbulent models was carried for flow over the surface, and it observed that RNG \u003cem\u003ek\u003c/em\u003e-\u003cspan class=\"InlineEquation\"\u003e\u003cspan class=\"mathinline\"\u003e\\(\\epsilon\\)\u003c/span\u003e\u003c/span\u003e model results is more closed with respect to Dittus-Boelter equation. After selection of appropriate turbulence model, simulations were carried out on a bulb-shape rib and other shapes of roughened ribs surface. This study reveals that absorber bulb shaped ribs roughened surface has at least two times more performance improvement factor (Nu/\u003cem\u003ef\u003c/em\u003e) as compared to the other ribbed shape roughened surface. Eventually, the Nusselt number and Coefficient friction for bulb shaped ribs roughened surface were correlated in terms of Reynolds number (Re) and relative roughness (\u003cem\u003eβ\u003c/em\u003e). 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