Impact of Multi-Walled Carbon Nanotube Dimensions on Heat and Momentum Transfer in Miniature Channels

Impact of Multi-Walled Carbon Nanotube Dimensions on Heat and Momentum Transfer in Miniature Channels | 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 Impact of Multi-Walled Carbon Nanotube Dimensions on Heat and Momentum Transfer in Miniature Channels Mohammdreza Hejri, Esmaeil Esmaeilzadeh, Alireza Rostamzadeh Khosroshahi, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7837416/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 paper numerically examines the effect of nanoparticle dimensions on heat and momentum transfer in laminar flow within a fully developed region of miniature channels. Velocity boundary conditions are fully developed, heat flux is applied from the upper and lower walls, and the other walls are insulated. Five different shapes of multi-walled carbon nanotubes (MWCNTs) are stabilized in water and ethylene glycol, which serve as the base fluids. These contain volume fractions of 0.25%, 0.50%, and 0.75%, used as working fluids for flow simulation. The study discusses the influence of nanoparticle dimensions (length and external diameter), volume fraction, Reynolds number, and base fluid type on heat transfer. The longer the geometrical shapes of the particles relative to each other, the higher the heat conduction and heat transfer coefficients. Additionally, results show that using water as the base fluid results in less enhancement of heat transfer compared to ethylene glycol. Finally, the study offers insights for selecting suitable nanofluids for simulation and practical applications. Numerical Simulation Nanoparticle Multi-walled carbon nanotubes Heat Transfer Pressure Drop 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-7837416","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":554533184,"identity":"17cbce1e-ae2c-45ff-b9e1-7a3d2e5a9f59","order_by":0,"name":"Mohammdreza Hejri","email":"","orcid":"","institution":"Islamic Azad University","correspondingAuthor":false,"prefix":"","firstName":"Mohammdreza","middleName":"","lastName":"Hejri","suffix":""},{"id":554533185,"identity":"40d9f2a9-8e4d-4e1a-a116-c8e6a80e94ea","order_by":1,"name":"Esmaeil Esmaeilzadeh","email":"","orcid":"","institution":"Islamic Azad 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Velocity boundary conditions are fully developed, heat flux is applied from the upper and lower walls, and the other walls are insulated. Five different shapes of multi-walled carbon nanotubes (MWCNTs) are stabilized in water and ethylene glycol, which serve as the base fluids. These contain volume fractions of 0.25%, 0.50%, and 0.75%, used as working fluids for flow simulation. The study discusses the influence of nanoparticle dimensions (length and external diameter), volume fraction, Reynolds number, and base fluid type on heat transfer. The longer the geometrical shapes of the particles relative to each other, the higher the heat conduction and heat transfer coefficients. Additionally, results show that using water as the base fluid results in less enhancement of heat transfer compared to ethylene glycol. 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