Puukuitususpension putkistovirtaus, viskositeetti ja häviökorrelaatiomalli

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dc.contributor.author Korhola, Tapani
dc.date.accessioned 2010-12-01T13:30:47Z
dc.date.available 2010-12-01T13:30:47Z
dc.date.issued 2010
dc.identifier.uri http://urn.fi/URN:NBN:fi:jyu-201012013132 en
dc.identifier.uri http://hdl.handle.net/123456789/25648
dc.description.abstract We 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.extent 42
dc.language.iso fin
dc.rights This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited. en
dc.rights Julkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty. fi
dc.subject.other suspensio
dc.subject.other putkistovirtaus
dc.subject.other korrelaatiomalli
dc.title Puukuitususpension putkistovirtaus, viskositeetti ja häviökorrelaatiomalli
dc.type Book en
dc.identifier.urn URN:NBN:fi:jyu-201012013132
dc.subject.ysa viskositeetti
dc.subject.ysa mittausmenetelmät
dc.type.dcmitype Text en
dc.type.ontasot Pro gradu fi
dc.type.ontasot Master’s thesis en
dc.contributor.tiedekunta Matemaattis-luonnontieteellinen tiedekunta fi
dc.contributor.tiedekunta Faculty of Mathematics and Science en
dc.contributor.laitos Fysiikan laitos fi
dc.contributor.laitos Department of Physics en
dc.contributor.yliopisto University of Jyväskylä en
dc.contributor.yliopisto Jyväskylän yliopisto fi
dc.contributor.oppiaine fysiikka fi

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