Falling film hydrodynamics and heat transfer under vapor shearing from various orientations

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dc.authoridZhao, Chuang-Yao/0000-0002-0534-6540
dc.contributor.authorZhao, Chuang-Yao
dc.contributor.authorLi, Qiong-Tao
dc.contributor.authorZhang, Fang-Fang
dc.contributor.authorQi, Di
dc.contributor.authorYildizhan, Hasan
dc.contributor.authorJiang, Jun-Min
dc.date.accessioned2025-01-06T17:44:58Z
dc.date.available2025-01-06T17:44:58Z
dc.date.issued2024
dc.description.abstractVapor shearing is a common issue encountered in the operations of falling film heat exchangers. The vapor stream effect depends on its orientation. This study investigates liquid film hydrodynamics and heat transfer performance under the influence of vapor streams from different orientations. The results indicate that both orientation and velocity of vapor determine the encountering time and position of the films on the tube's two sides. The liquid film thickness uniformity and the liquid column deflection vary significantly depending on the orientation and velocity of the vapor. Zones of accelerated liquid film, climbing liquid film, liquid stagnation, and transition of liquid film flow pattern are observed. The gradient of film thickness along the tube axis and the deflection in time-averaged peripheral film thickness increase as the vapor orientation varies from 0 degrees to 90 degrees and subsequently decrease as the vapor orientation varies from 90 degrees to 180 degrees. Vapor streams have more pronounced effects on time-averaged peripheral film thickness in regions close to the liquid inlet and outlet. Vapor streams result in changes in peripheral heat transfer coefficients toward the downstream side depending on the orientation and velocity of the vapor. The impact of vapor streams on the overall heat transfer coefficient does not directly correlate with the velocity of the vapor when maintaining the same orientation.
dc.description.sponsorshipNational Natural Science Foundation of China10.13039/501100001809 [51976144]; National Natural Science Foundation of China; Youth Innovation Team of Shaanxi Universities
dc.description.sponsorshipThis work was supported by the National Natural Science Foundation of China (51976144). The authors also gratefully acknowledge the support of the Youth Innovation Team of Shaanxi Universities, the International Joint Research Center for Building Service Science, and the Underground Space Environment, Shaanxi (China).
dc.identifier.doi10.1063/5.0210075
dc.identifier.issn1070-6631
dc.identifier.issn1089-7666
dc.identifier.issue5
dc.identifier.scopus2-s2.0-85192672370
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1063/5.0210075
dc.identifier.urihttps://hdl.handle.net/20.500.14669/3263
dc.identifier.volume36
dc.identifier.wosWOS:001225950200001
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherAip Publishing
dc.relation.ispartofPhysics of Fluids
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241211
dc.subjectFlow
dc.subjectEvaporatıon
dc.subjectPerformance
dc.subjectWater
dc.subjectR134a
dc.titleFalling film hydrodynamics and heat transfer under vapor shearing from various orientations
dc.typeArticle

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