Study on transient flow model of viscoelastic pipeline based on viscous and unsteady friction effect

Study on transient flow model of viscoelastic pipeline based on viscous and unsteady friction effect | 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 Article Study on transient flow model of viscoelastic pipeline based on viscous and unsteady friction effect Xiaoying Zhang, Lingtong Lei, Shuanghu Zhang, Lingkai Zhang, Chao Wang This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7395823/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 The existing transient flow model of viscoelastic pipe fails to fully consider the coupling effect of material-dependent viscoelastic creep behavior and unsteady friction effect, and underestimates the attenuation process of pressure wave. Therefore, this paper studies a new coupling numerical model, which combines the generalized Kelvin-Voigt constitutive model of wall viscoelasticity with the Vardy dynamic friction model, and uses a parameter identification method of hybrid optimization strategy to invert the creep characteristic parameters. Compared with the traditional steady-state friction model and the Vardy friction model, the accuracy and computational efficiency of the new model are verified. The results show that the steady-state friction model and the Vardy friction model are significantly different from the experimental values in terms of pressure peak and phase offset. The maximum percentage error of the peak pressure at the valve is 19.13% for the Vardy friction model. After considering the viscous effect and the unsteady friction effect, the simulation results are in good agreement with the experimental data, and the maximum percentage error of the peak pressure is only 1.65%. In addition, under the same calculation conditions, the new model reduces the calculation time by about 80% compared with the traditional Vardy friction model, and shows excellent performance in terms of accuracy and efficiency, which can provide an accurate and efficient simulation method for the hydraulic transition process of viscoelastic pipelines. Physical sciences/Engineering Physical sciences/Materials science Physical sciences/Mathematics and computing Physical sciences/Physics transient flow viscoelastic pipe creep behavior unsteady friction coupling model 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-7395823","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":514688333,"identity":"9b142a30-fa27-47da-8a19-d2b3ca599965","order_by":0,"name":"Xiaoying Zhang","email":"","orcid":"","institution":"Xinjiang Agricultural University","correspondingAuthor":false,"prefix":"","firstName":"Xiaoying","middleName":"","lastName":"Zhang","suffix":""},{"id":514688334,"identity":"b86f81cd-1c16-41cf-9d52-6d0fdc92459f","order_by":1,"name":"Lingtong Lei","email":"","orcid":"","institution":"Xinjiang Agricultural University","correspondingAuthor":false,"prefix":"","firstName":"Lingtong","middleName":"","lastName":"Lei","suffix":""},{"id":514688335,"identity":"61d1564d-a9e7-4543-a047-ce81b1b96413","order_by":2,"name":"Shuanghu Zhang","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAwklEQVRIiWNgGAWjYDACCTB5IIGfmYGNRC2SzSRrMThArBb52c3PHn75cyfP+DiP2eMKBjs53QYCWhjnHDM3lm17Vmx2mMfc8AxDsrHZAQJamCUSzKQlGw4nbjvMu02ygeFA4jZCWtgk0r9JS/w5nLi5mVgtPBI5ZpIf2A4nbmAmVouERE6ZNGPb4cQZh/m/STYYEOEX+Rnp2yR/AB3W338sTbKhwk6OoBYQYOaBMw2IUA4CjD+IVDgKRsEoGAUjFAAAg81Bx5gqDu0AAAAASUVORK5CYII=","orcid":"","institution":"China Institute of Water Resources and Hydropower Research","correspondingAuthor":true,"prefix":"","firstName":"Shuanghu","middleName":"","lastName":"Zhang","suffix":""},{"id":514688336,"identity":"fe61e8dd-c70e-4597-ba64-e99ed66edecf","order_by":3,"name":"Lingkai Zhang","email":"","orcid":"","institution":"Xinjiang Agricultural University","correspondingAuthor":false,"prefix":"","firstName":"Lingkai","middleName":"","lastName":"Zhang","suffix":""},{"id":514688337,"identity":"721cb06d-da22-4e3f-baa5-0314e9f2e8c5","order_by":4,"name":"Chao Wang","email":"","orcid":"","institution":"Xinjiang Agricultural University","correspondingAuthor":false,"prefix":"","firstName":"Chao","middleName":"","lastName":"Wang","suffix":""}],"badges":[],"createdAt":"2025-08-18 05:08:12","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-7395823/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-7395823/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":101193833,"identity":"3a0d881a-4166-4e1e-bf38-139714729e47","added_by":"auto","created_at":"2026-01-27 07:43:09","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":810900,"visible":true,"origin":"","legend":"","description":"","filename":"Originalmanuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-7395823/v1_covered_47bc5211-5fa6-495c-ba8f-6009c9414e78.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Study on transient flow model of viscoelastic pipeline based on viscous and unsteady friction effect","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":"transient flow, viscoelastic pipe, creep behavior, unsteady friction, coupling model","lastPublishedDoi":"10.21203/rs.3.rs-7395823/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-7395823/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"The existing transient flow model of viscoelastic pipe fails to fully consider the coupling effect of material-dependent viscoelastic creep behavior and unsteady friction effect, and underestimates the attenuation process of pressure wave. Therefore, this paper studies a new coupling numerical model, which combines the generalized Kelvin-Voigt constitutive model of wall viscoelasticity with the Vardy dynamic friction model, and uses a parameter identification method of hybrid optimization strategy to invert the creep characteristic parameters. Compared with the traditional steady-state friction model and the Vardy friction model, the accuracy and computational efficiency of the new model are verified. The results show that the steady-state friction model and the Vardy friction model are significantly different from the experimental values in terms of pressure peak and phase offset. The maximum percentage error of the peak pressure at the valve is 19.13% for the Vardy friction model. After considering the viscous effect and the unsteady friction effect, the simulation results are in good agreement with the experimental data, and the maximum percentage error of the peak pressure is only 1.65%. In addition, under the same calculation conditions, the new model reduces the calculation time by about 80% compared with the traditional Vardy friction model, and shows excellent performance in terms of accuracy and efficiency, which can provide an accurate and efficient simulation method for the hydraulic transition process of viscoelastic pipelines.","manuscriptTitle":"Study on transient flow model of viscoelastic pipeline based on viscous and unsteady friction effect","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-09-15 13:38:41","doi":"10.21203/rs.3.rs-7395823/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","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}}],"origin":"","ownerIdentity":"834c5027-c6e3-4278-8c3f-0893861080bb","owner":[],"postedDate":"September 15th, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[{"id":54675639,"name":"Physical sciences/Engineering"},{"id":54675640,"name":"Physical sciences/Materials science"},{"id":54675641,"name":"Physical sciences/Mathematics and computing"},{"id":54675642,"name":"Physical sciences/Physics"}],"tags":[],"updatedAt":"2026-01-27T07:42:16+00:00","versionOfRecord":[],"versionCreatedAt":"2025-09-15 13:38:41","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-7395823","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-7395823","identity":"rs-7395823","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}