Multi-Channel Heat Pipe: Experimental Investigation, CFD Analysis, and Theoretical Modeling of Two-Phase Heat Transfer

Multi-Channel Heat Pipe: Experimental Investigation, CFD Analysis, and Theoretical Modeling of Two-Phase Heat Transfer | 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 Multi-Channel Heat Pipe: Experimental Investigation, CFD Analysis, and Theoretical Modeling of Two-Phase Heat Transfer Dr. Yogita Yerne This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5946201/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 This is the study of an innovative application of multi-channel heat pipe use for harnessing and reusing wasted heat from engine exhaust. To unravel the intricacies of two-phase heat transfer involving boiling and condensation within multi-channel heat pipes, a distinctive multichannel heat pipe was designed and constructed. Computational Fluid Dynamics (CFD) and theoretical models for the multi-channel heat pipe were developed for a comprehensive understanding. The simulation of multichannel heat pipe operation using ANSYS Fluent employed the Volume of Fluid (VOF) approach and the Lee model. Multiple Lee models, implemented through user-defined functions (UDF), were compared, and the impact of condenser boundary conditions, saturation temperature, and mass transfer coefficient on the simulations was thoroughly examined. This study identifies the significant limitations of the Lee model for heat pipe simulation, exposing its incapability in predicting heat pipe temperatures due to low physical significance and susceptibility to manipulation. A novel theoretical model was formulated for multi-channel heat pipes which were based on experimental data from multichannel heat pipe. This model uses the thermal-electrical resistance analogy to predict the thermal resistance of the multichannel heat pipe. The selection of optimal correlations for pool boiling and film wise condensation, the developed iterative theoretical model achieved 9.2% error in predicting the thermal resistance of multichannel heat pipe. In conclusion, this research sheds light on the intricacies of multi-channel heat pipes and highlights the shortcomings of existing Lee models in simulating heat pipe behavior. The proposed theoretical model, grounded in experimental data, provides a more accurate prediction of thermal resistance, paving the way for improved design and performance of heat pipe applications vapor absorption cooling systems. 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-5946201","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":411035508,"identity":"a21886a7-4315-4412-86bf-eef8b0a0ce9b","order_by":0,"name":"Dr. Yogita Yerne","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA+0lEQVRIiWNgGAWjYJCCA3DWBwYLCCOBkBaYHsYZDBIMPMRogVvDzAPTgg8YHG+/ePhDDUNiv/TZg49t/kjk27MfPsDwcAceLWfOFBw4cIwhcWZfXrJxbpuEZQ9PWgJD4hk8Wm7kJBw4wMaQuOEMj5l0boOEAY8EjwFDYhshLf8YEvef4TH/bfEHpIX/AwEt6QcOHGwD2sLDY8bMwAa2hQGvFskzZxgOnO2TMJ5xhsdYsrcNqOVMmsEBfFr4jrc//lDxzUa2v4fH8MOPPzYG7O2HHz78iUeLwgGgZxkYJBwbkEUP4NbAwCDfwP4ARNvjUzQKRsEoGAUjHAAAgk5Uye0+MXcAAAAASUVORK5CYII=","orcid":"","institution":"","correspondingAuthor":true,"prefix":"Dr.","firstName":"Yogita","middleName":"","lastName":"Yerne","suffix":""}],"badges":[],"createdAt":"2025-02-02 14:38:16","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-5946201/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-5946201/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":80067484,"identity":"f53cf595-d8b1-4e93-bea3-737cbf2d0b75","added_by":"auto","created_at":"2025-04-07 13:31:50","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":747889,"visible":true,"origin":"","legend":"","description":"","filename":"Manuscript20225.pdf","url":"https://assets-eu.researchsquare.com/files/rs-5946201/v1_covered_7e87f5f5-156a-4858-af01-363058db2c6a.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"\u003cp\u003e\u003cstrong\u003eMulti-Channel Heat Pipe: Experimental Investigation, CFD Analysis, and Theoretical Modeling of Two-Phase Heat Transfer\u003c/strong\u003e\u003c/p\u003e","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":"","lastPublishedDoi":"10.21203/rs.3.rs-5946201/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-5946201/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThis is the study of an innovative application of multi-channel heat pipe use for harnessing and reusing wasted heat from engine exhaust. To unravel the intricacies of two-phase heat transfer involving boiling and condensation within multi-channel heat pipes, a distinctive multichannel heat pipe was designed and constructed. Computational Fluid Dynamics (CFD) and theoretical models for the multi-channel heat pipe were developed for a comprehensive understanding.\u003c/p\u003e \u003cp\u003eThe simulation of multichannel heat pipe operation using ANSYS Fluent employed the Volume of Fluid (VOF) approach and the Lee model. Multiple Lee models, implemented through user-defined functions (UDF), were compared, and the impact of condenser boundary conditions, saturation temperature, and mass transfer coefficient on the simulations was thoroughly examined. 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