CFD Simulation and Experimental Validation of a Circulating Fluidized Bed Riser with Gamma Transmission Measurements

CFD Simulation and Experimental Validation of a Circulating Fluidized Bed Riser with Gamma Transmission Measurements | 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 CFD Simulation and Experimental Validation of a Circulating Fluidized Bed Riser with Gamma Transmission Measurements Hilário Lima Filho, Carlos Costa Dantas, Valdemir Alexandre dos Santos, and 4 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6711010/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 11 Mar, 2026 Read the published version in Brazilian Journal of Chemical Engineering → Version 1 posted 5 You are reading this latest preprint version Abstract This work investigates the fluid dynamic behavior of a circulating fluidized bed riser through CFD simulations and experimental measurements using gamma radiation. The main objective was to compare the accuracy of the Gidaspow and EMMS drag coefficient models in predicting the distribution of solids along the riser. The simulations were conducted using ANSYS Fluent software, which focused on predicting the volumetric fraction of solids and the pressure variation along the riser height. The results showed that the EMMS model, which considers interactions at multiple scales, provided more accurate predictions of solids concentration, especially in less dense regions. In contrast, the Gidaspow model presented underestimation in some sections. The experimental analysis reinforces the importance of considering the effects of particle clustering on flow behavior, highlighting the superiority of the EMMS model in simulating circulating fluidized beds. It is concluded that the EMMS model is more suitable for this type of application due to its greater accuracy in representing the interactions between the solid and gas phases. Riser Circulating Fluidized Bed CFD Simulation Gamma Radiation Full Text Cite Share Download PDF Status: Published Journal Publication published 11 Mar, 2026 Read the published version in Brazilian Journal of Chemical Engineering → Version 1 posted Reviewers agreed at journal 07 Jul, 2025 Reviewers invited by journal 15 Jun, 2025 Editor invited by journal 22 May, 2025 Editor assigned by journal 21 May, 2025 First submitted to journal 20 May, 2025 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. 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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-6711010","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":471567638,"identity":"ecf0b32c-f2cc-4f95-b378-54ff94d19100","order_by":0,"name":"Hilário Lima 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