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dc.contributor.authorSkorve, Torill Rødlandeng
dc.date.accessioned2012-04-23T10:02:33Z
dc.date.available2012-04-23T10:02:33Z
dc.date.issued2011-11-18eng
dc.date.submitted2011-11-18eng
dc.identifier.urihttp://hdl.handle.net/1956/5762
dc.description.abstractIn this thesis, a combination of experimental measurements and numerical simulations are used to investigate the phenomenon "End of the Vortex" in swirl tubes. The main focus here has been comparing swirl tubes containing walls with smooth surfaces to tubes with different heights of wall roughness. The tubes containing wall roughening were either treated with sandpaper or metal particles to achieve a uniform roughening at the wall throughout the whole section. The vortex has been visualized by two different methods; by inserting dust into the tube and by the use of high resolution pressure transducers on the separator tube. The experiments were carried out on different cylindrical tubes with lengths of 60, 80 and 100 cm. The effect of flow rate through the cyclone was studied. The results of the experimental measurements are compared with data from numerical simulations. 3-D RSM simulations were carried out using the commercial CFD package Star-CD. The obtained results showed qualitative agreement with each other. The results showed that the vortex core bent off to the wall further up in the separator tube when the walls contained a rough surface. The vortex also needed a higher flow rate before it went down to the bottom and centralized than it needed with a smooth surface.en
dc.format.extent2789907 byteseng
dc.format.mimetypeapplication/pdfeng
dc.language.isoengeng
dc.publisherThe University of Bergeneng
dc.subjectSwirl tubeeng
dc.titleExperimental and theoretical study on the effect of wall roughness on the phenomenon end of the vortex in swirl tubeseng
dc.typeMaster thesiseng
dc.type.degreeMasternob
dc.type.coursePRO399eng
dc.subject.nsiVDP::Mathematics and natural science: 400::Physics: 430eng
dc.subject.archivecodeMastergradeng
dc.subject.nus752199eng
dc.type.programMAMN-PROeng


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