Näytä suppeat kuvailutiedot

dc.contributor.authorKorhola, Tapani
dc.date.accessioned2010-12-01T13:30:47Z
dc.date.available2010-12-01T13:30:47Z
dc.date.issued2010
dc.identifier.otheroai:jykdok.linneanet.fi:1143686
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/25648
dc.description.abstractWe measured pressure loss and velocity profile from pine and birch suspension flow in two straight PVC-tubes. The suspension consistencies were 0,5 %–4,0 % and tubes' radius were 105,2 mm and 191,6 mm. The velocity profiles were measured with pulsed ultrasonic Doppler velocimetry technique. Unusual laminar shaped profiles were discovered at low flow rates of birch suspension. With these profiles it was possible to calculate the actual viscosity for fiber suspension. In the analysis we discovered that the viscosity didn't depend on the flow velocity or geometry. It was possible to write a material law that describes the viscosity as a function of shear rate with two material related parameters: =eC n . We compared theoretical velocity profiles plotted with the described viscosity to actual measured velocity profiles. Good match between profiles supports the material law. In the measurements we weren't able to measure as high flow rates we wanted to be able study loss correlation model between flow rate and pressure loss in depth. Still it was possible to do a simple parametrization of the model and test how it scales between two pipes of different diameter. The model scaled well only for low fiber consistencies, for birch with consistencies 1,0 % and 1,5 % and for pine at the consistency of 0,5 %.
dc.format.extent42 sivua
dc.language.isofin
dc.rightsThis publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.en
dc.rightsJulkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty.fi
dc.subject.othersuspensio
dc.subject.otherputkistovirtaus
dc.subject.otherkorrelaatiomalli
dc.titlePuukuitususpension putkistovirtaus, viskositeetti ja häviökorrelaatiomalli
dc.identifier.urnURN:NBN:fi:jyu-201012013132
dc.type.dcmitypeTexten
dc.type.ontasotPro gradufi
dc.type.ontasotMaster’s thesisen
dc.contributor.tiedekuntaMatemaattis-luonnontieteellinen tiedekuntafi
dc.contributor.tiedekuntaFaculty of Sciencesen
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.contributor.yliopistoUniversity of Jyväskyläen
dc.contributor.yliopistoJyväskylän yliopistofi
dc.contributor.oppiaineFysiikkafi
dc.contributor.oppiainePhysicsen
dc.rights.accesslevelopenAccessfi
dc.contributor.oppiainekoodi4021
dc.subject.ysoviskositeetti
dc.subject.ysomittausmenetelmät


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Näytä suppeat kuvailutiedot