Please use this identifier to cite or link to this item: https://scholarhub.balamand.edu.lb/handle/uob/4135
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dc.contributor.advisorIssa, Johnnyen_US
dc.contributor.authorNakhl, Jaden_US
dc.date.accessioned2020-12-23T14:40:31Z-
dc.date.available2020-12-23T14:40:31Z-
dc.date.issued2017-
dc.identifier.urihttps://scholarhub.balamand.edu.lb/handle/uob/4135-
dc.descriptionIncludes bibliographical references (p. 59-60.en_US
dc.descriptionSupervised by Dr. Johnny Issa.en_US
dc.description.abstractA numerical study of a laminar flow in an expanding round pipe with a backward facing step is conducted. Uniform and parabolic velocity profiles are used at the inlet just before the abrupt expansion. Reynolds number used in the simulations was in range between 100 and 1000 and based on the small pipe diameter. The aspect ratio D/d was systematically varied between 2, 3 and 4. The pipe was maintained under a constant surface temperature of 310K. Two types of fluid were used in the numerical simulations with Prandtl equal to 0.7 and 7. Due to the expansion, a flow separation region known as the recirculation region was observed. The increase in Reynolds number led to an increase in the reattachment and the fully developed lengths of the flow, the same behavior was observed when the aspect ratio was increased. The reattachment and fully developed lengths of the parabolic velocity profile are both greater than these lengths corresponding to the uniform velocity profile. A linear correlation is obtained for the reattachment length as a function of Reynolds number for the different values D/d and for both velocity profiles. Similar linear correlations were obtained for the fully developed length for all considered cases. The thermal analysis of this problem focused mainly on the local Nusselt number distribution. It was noticed that the parameters that affected the reattachment length also affected the local Nusselt number behavior. The Nusselt number distribution in the large pipe increased when Reynolds number and the aspect ratio decreased and was higher for the case of the uniform velocity profile at the inlet.en_US
dc.description.statementofresponsibilityby Jad Nakhlen_US
dc.format.extentxi, 60 p. :ill., tables ;30 cmen_US
dc.language.isoengen_US
dc.rightsThis object is protected by copyright, and is made available here for research and educational purposes. Permission to reuse, publish, or reproduce the object beyond the personal and educational use exceptions must be obtained from the copyright holderen_US
dc.subject.lcshLaminar flowen_US
dc.titleNumerical study of a laminar flow in an expanding round pipe with a backward facing stepen_US
dc.typeThesisen_US
dc.contributor.departmentDepartment of Mechanical Engineeringen_US
dc.contributor.facultyFaculty of Engineeringen_US
dc.contributor.institutionUniversity of Balamanden_US
dc.date.catalogued2017-12-22-
dc.description.degreeMS in Mechanical Engineeringen_US
dc.description.statusPublisheden_US
dc.identifier.ezproxyURLhttp://ezsecureaccess.balamand.edu.lb/login?url=http://olib.balamand.edu.lb/projects_and_theses/GP-Mec-174.pdfen_US
dc.identifier.OlibID175797-
dc.provenance.recordsourceOliben_US
Appears in Collections:UOB Theses and Projects
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