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Dissertations / Theses on the topic 'Fibre suspension'

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Published: 4 June 2021
Last updated: 20 February 2023

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1

Hyensjö, Marko. "On fibre suspension flow modelling : mechanical fibre flocculation and fibre orientation /." Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-344.

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2

Kvick, Mathias. "Transitional and turbulent fibre suspension flows." Doctoral thesis, KTH, Strömningsfysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-153018.

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In this thesis the orientation of macro-sized fibres in turbulent flows is studied, as well as the effect of nano-sized fibrils on hydrodynamic stability. The focus lies on enabling processes for new materials where cellulose is the main constituent. When fibres (or any elongated particles) are added to a fluid, the complexity of the flow-problem increases. The fluid flow will influence the rotation of the fibres, and therefore also effect the overall fibre orientation. Exactly how the fibres rotate depends to a large extent on the mean velocity gradient in the flow. In addition, when fibres a
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3

Yan, Huawei. "Fibre suspension flocculation under simulated forming conditions." Doctoral thesis, KTH, Fibre and Polymer Technology, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3794.

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<p>A flow loop system for study of fibre flocculation insuspensions has been developed. The system is designed tosimulate the flow conditions in a paper machine headbox. It isequipped with a radial distributor feeding a step diffuser pipepackage, after which the flow is contracted in a 2-D nozzle.The flow system is also equipped with a secondary flowcontraction with an area reduction ratio of 2:1 after theheadbox nozzle, mimicking accelerations that may take placeduring forming. The flow system is equipped with heating andcooling devices for the study of temperature effects on fibresuspension
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4

Diatezua, Jacquie Kiangebeni. "Some theoretical aspects of fibre suspension flows." Master's thesis, University of Cape Town, 1999. http://hdl.handle.net/11427/9707.

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Bibliography: leaves 77-82.<br>This thesis is concerned with properties of equations governing fibre suspensions. Of particular interest is the extent to which solutions, and their properties, depend on the type of closure used. For this purpose two closure rules are investigated: the linear and the quadratic closures. We show that the equations are consistent with the second law of thermodynamics, or dissipation inequality, when the quadratic closure is used. When the linear closure is used, a sufficient condition for consistency is that the particle number Np satisfies Np ≤ 35/2. Likewise, flow
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5

Joung, Clint Gwarngsoo. "Direct simulation studies of suspended particles and fibre-filled suspensions." Thesis, The University of Sydney, 2003. http://hdl.handle.net/2123/554.

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A new Direct Simulation fibre model was developed which allowed flexibility in the fibre during the simulation of fibre suspension flow.This new model was called the 'Chain-of-Spheres' model.It was hypothesised that particle shape and deformation could significantly affect particle dynamics,and also suspension bulk properties such as viscosity.Data collected from the simulation showed that flexible fibres in shear flow resulted in an order of 7 −10% bulk relative viscosity increase over the 'rigid' fibre result.Results also established the existence of a relationship between bulk viscosity and parti
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6

Joung, Clint Gwarngsoo. "Direct simulation studies of suspended particles and fibre-filled suspensions." University of Sydney. Chemical Engineering, 2003. http://hdl.handle.net/2123/554.

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A new Direct Simulation fibre model was developed which allowed flexibility in the fibre during the simulation of fibre suspension flow.This new model was called the �Chain-of-Spheres �model.It was hypothesised that particle shape and deformation could signi ficantly a ffect partic e dynamics,and also suspension bulk properties such as viscosity.Data collected from the simulation showed that flexible fibres in shear flow resulted in an order of 7 −10% bulk relative viscosity increase over the �rigid �fibre result.Results also es- tablished the existence of a relationship between bulk viscosity and
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7

Lindström, Stefan B. "Simulations of the Dynamics of Fibre Suspension Flows." Licentiate thesis, Mid Sweden University, Department of Natural Sciences, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-53.

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<p>A new model for simulating non-Brownian flexible fibres suspended in a Newtonian fluid has been developed. Special attention has been given to include realistic flow conditions found in the industrial papermaking process in the key features of the model; it is the intention of the author to employ the model in simulations of the forming section of the paper machine in future studies.</p><p>The model considers inert fibres of various shapes and finite stiffness, interacting with each other through normal, frictional and lubrication forces, and with the surrounding fluid medium through hydrod
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8

Kvick, Mathias. "Hydrodynamic stability and turbulence in fibre suspension flows." Licentiate thesis, KTH, Mekanik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-95279.

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9

Raghem-Moayed, Amir. "Characterization of fibre suspension flows at papermaking consistencies." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq41040.pdf.

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10

Holm, Richard. "Fluid mechanics of fibre suspension related to paper making." Doctoral thesis, KTH, Mechanics, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-100.

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<p>This thesis deals with fluid dynamic mechanisms related to papermaking, specif- ically: the initial dewatering mechanisms during roll-forming and fibre motion in sedimentation and in shear flow. </p><p>Pressure and wire position measurements have been conducted in a model resembling the forming zone and the measured pressure distributions are shown to have more complex patterns than the simple model p / T/R (where T is the wire tension and R is the roll radius). It is shown that an increase in wire tension has a similar effect as a decrease in flow-rate on the shape of the pressure distribu
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11

Luo, Chitao. "The investigation of turbulent statistics of a fibre suspension undergoing mixing." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0001/MQ46079.pdf.

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12

Carlsson, Allan. "Near wall fibre orientation in flowing suspensions." Doctoral thesis, KTH, Linné Flow Center, FLOW, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9995.

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This thesis deals with fibre orientation in wall-bounded shear flows. The primary application in mind is papermaking. The study is mainly experimental,but is complemented with theoretical considerations.The main part of the thesis concerns the orientation of slowly settlingfibres in a wall-bounded viscous shear flow. This is a flow case not dealt withpreviously even at small Reynolds numbers. Experiments were conducted usingdilute suspensions with fibres having aspect ratios of rp ≈ 7 and 30. It is foundthat the wall effect on the orientation is small for distances from the wall wherethe fibre
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13

Zhang, Feng. "Eulerian Numerical Study of the Sedimentation of Fibre Suspensions." Licentiate thesis, KTH, Mekanik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-96767.

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Sedimenting suspensions exist in a varity of natural phenomena and industrial applications. It is already observed in experiments that the dilute fibre suspensions experience a hydrodynamics instability under gravity at low Reynolds numbers. Initially well-mixed suspensions become inhomogeneous and anisotropic due to this instability.The main goal of this work is to understand the instability in a dilute fibre suspension by means of an Eulerian approach which is based on the Navier-Stokes equations coupled to Fokker-Planck equation for the PDF of fibres.Using a linear stability analysis, we sh
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14

Munganga, Justin Manango Wazute. "Existence and stability of solutions to the equations of fibre suspension flows." Doctoral thesis, University of Cape Town, 1999. http://hdl.handle.net/11427/9728.

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Includes bibliographical references.<br>A popular approach to formulating the initial-boundary value problem for fibre suspension flows is that in which fibre orientation is accounted for in an averaged sense, through the introduction of a second-order orientation tensor A. This variable, together with the velocity and pressure, then constitutes the set of unknown variables for the problem. The governing equations are balance of linear momentum, the incompressibility condition, an evolution equation for A, and a constitutive equation for the stress. The evolution equation contains a fourth-ord
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15

Bland, Jonathan H. "The rheology and processing of glass mat thermoplastics." Thesis, University of Newcastle Upon Tyne, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363537.

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16

Carlsson, Allan. "Orientation of fibres in suspensions flowing over a solid surface." Licentiate thesis, Stockholm : Royal Institute of Technology, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4278.

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17

Fällman, Monika Carina. "Turbulence measurements in fiber suspension flows : experimental methods and results." Licentiate thesis, KTH, Mechanics, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11460.

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<p>Turbulent mixing is present in many pulp and paper processes. It is a particularly important factor in the design and improvements of the paper machine headbox, influencing the final paper structure. During this project, experimental methods to quantify the effect of fibers on turbulent suspension flows have been developed, and then used for studying turbulent mixing in fiber suspensions. A technique that uses microprobes to measure passive scalar mixing of salt for the characterization of turbulent fluctuations in a fiber suspension flow has been developed: Conductivity micro-probes have b
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18

Hirota, Masato. "An Experimental Study of Fibre SuspensionFlows in Pipes using Nuclear MagneticResonance Imaging." Thesis, KTH, Mekanik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202628.

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This study deals with fibre suspension flows through cylindrical pipes. Thepresent work aims at measurements of opaque flows, which are common inindustries. Nuclear magnetic resonance imaging (NMRI) and ultrasound velocimetryprofiling (UVP) were employed as non-invasive and optic-independenttools to measure the velocity profiles. As a first experiment, a paper-pulp suspensionflow through a sudden contraction and expansion was investigated.The results show the NMRI technique can be used to measure the stronglyunsteady flow such as separated regions though the MR signal is attenuateddue to the t
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19

Bergström, Jonas. "Flow Field and Fibre Fractionation Studies in Hydrocyclones." Doctoral thesis, KTH, Fiber- och polymerteknik, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4175.

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Hydrocyclones can be used to fractionate fibres according to their papermaking potential. The obtained fractions typically differ in fibre wall thickness and/or degree of fibre treatment. Despite a multitude of potential application scenarios, the process has so far had little commercial success. This is largely explained by the low fractionation efficiency and unfavourable operating characteristics of the process. The fractionation efficiency of a hydrocyclone is closely related to its flow field. The influence of pulp concentration on the tangential velocity field was therefore studied, by u
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20

Bouhabila, El Hani. "Epuration d'eaux usées par bioréacteur aéré à membranes immergées : intéraction suspension floculée / membrane." Toulouse, INSA, 1999. http://www.theses.fr/1999ISAT0023.

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Cette étude est consacrée à la caractérisation du fonctionnement d’un bio réacteur à membranes à fibres creuses immergées pour l’épuration d’eau usée domestique ou d’un effluent synthétique. Les paramètres qui ont caractérisé le fonctionnement du bio réacteur à membrane sont l’âge de la boue( 10, 20 et 30 jours) et la charge volumique appliquée. Malgré la présence de composés difficilement biodégradables dans l’effluent à traiter, le rendement d’élimination de composés organiques était supérieur à 90% même pour une charge volumique de 5,7 Kg DCO/m3. J. La membrane a prouvé son rôle dans l’élim
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21

Hyensjö, Marko. "Fibre Orientation Modelling Applied to Contracting Flows Related to Papermaking." Doctoral thesis, KTH, Mekanik, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4762.

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The main goal of this work was to develop numerical models for studying the behaviour of fibres in an accelerated flow. This is of special interest for e.g. papermaking. The early stage of the paper manufacturing process determines most of the final properties of a paper sheet. The complexity of studying the flow of fibre suspensions both experimentally and numerically emphasises a need for new ideas and developments. By means of solving the evolution of a convective-dispersion equation, i.e. the Fokker-Planck equation, a fully 3D approach with respect to the position and the two fibre angles,
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22

Lindström, Stefan. "Modelling and simulation of paper structure development." Doctoral thesis, Mittuniversitetet, Institutionen för naturvetenskap, teknik och matematik, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-7003.

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A numerical tool has been developed for particle-level simulations of fibre suspension flows, particularly forming of the fibre network structure of paper sheets in the paper machine. The model considers inert fibres of various equilibrium shapes, and finite stiffness, interacting with each other through normal, frictional, and lubrication forces, and with the surrounding fluid medium through hydrodynamic forces. Fibre–fluid interactions in the non-creeping flow regime are taken into account, and the two-way coupling between the solids and the fluid phases is included by enforcing momentum con
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23

Lowys, Marie-Pierre. "Comportement physico-chimique de suspensions de fibres cellulosiques : rôle des additifs." Université Joseph Fourier (Grenoble), 1999. http://www.theses.fr/1999GRE10195.

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Ce travail porte sur la caracterisation physico-chimique de suspensions aqueuses de microfibrilles de cellulose (mfc) issues de la transformation des betteraves sucrieres, seules ou en presence d'additifs. La composition chimique des suspensions meres de mfc est determinee : elles sont composees de 86% de cellulose pure, les 14% restant etant des pectines, des hemicelluloses et des sels. Les proprietes ioniques des mfc sont ensuite etudiees par differentes techniques (conductimetrie, potentiel d'ecoulement, potentiel zeta). L'etat de dispersion des suspensions a ete caracterise par des mesures
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24

Bellani, Gabriele. "Velocity measurements in a fiber suspension flow : formation of a fiber network /." Licentiate thesis, Stockholm : KTH Mechanics, Royal Institute of Technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9382.

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25

Söderberg, Daniel. "Hydrodynamics of plane liquid jets aimed at applications in paper manufacturing." Doctoral thesis, KTH, Mekanik, 1999. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2839.

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Process industries are in general depending, in one way or the other, on fluid mechanics.Specifically, paper manufacturing, which probably is the dominant processindustry in Sweden, is depending on the flow of cellulose fibres suspended in water.As a part of the process the suspension, consisting of fibres in water, is spread out onor between two moving permeable weaves, i.e. wires. The speed of this is usually 10–30 m/s and the suspension is spread out by a plane jet issuing from a headbox nozzle.It has been show that the conditions in the headbox and jet have a large influence onthe quality
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26

Paterson, Daniel Thomas. "Understanding rapid dewatering of cellulose fibre suspensions." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/58195.

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Rapid dewatering of cellulose fibre suspensions is a fundamental process in many unit operations in the production of pulp and paper. Understanding dewatering behaviour can be applied to optimizing designs of industrial equipment. In this project, we assess the suitability of a well-established modeling approach, referred to as the base model, at capturing the one dimensional dewatering behaviour of cellulose fibre suspensions seen experimentally. This modeling approach requires two closure relationships determined experimentally, i.e. compressive yield stress and permeability. Experimental eq
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27

Fletcher, Paul E. "Electrically assisted fibre filtration of aqueous suspensions." Thesis, Cranfield University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359519.

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28

Sykes, Paul. "Lubrication flows of semi-dilute fibre suspensions." Thesis, University of Cambridge, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627460.

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29

Férec, Julien. "Étude et modélisation du comportement rhéologique de suspensions de fibres rigides en régime non-dilué." École polytechnique de Montréal, 2008. http://www.theses.fr/2008LORIS116.

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De nombreuses recherches se sont intéressées aux comportements des suspensions de fibres en cisaillement simple (transitoire et permanent) et dynamique (petites déformations). Cependant le comportement élongationnel et la connaissance de leurs propriétés rhéologiques en grandes déformations oscillatoires sont d’un grand intérêt. Les résultats oscillatoires en grandes déformations montrent que pour des polypropylènes renforcés de fibres de verre courtes, l’amplitude de la contrainte en cisaillement diminue graduellement. Un comportement inverse est observé pour une matrice en polybutène. Pour c
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30

Bibbó, Miguel Angel. "Rheology of semiconcentrated fiber suspensions." Thesis, Massachusetts Institute of Technology, 1987. http://hdl.handle.net/1721.1/14875.

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31

Holm, Richard. "Fluid mechanics of fibre suspensions related to papermaking." Doctoral thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-100.

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32

Derakhshandeh, Babak. "Rheology of low to medium consistency pulp fibre suspensions." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/37371.

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Papermaking is a major industry to manufacture products vital to education, communication, and packaging. Most operations in this industry deal with the flow of different mass concentrations of pulp suspensions. Therefore, the flow properties (rheology) of pulp suspensions are of great importance for the optimal functionality of most unit operations in the industry. Yield stress is one of the most important rheological properties in designing process equipment, thus needs to be determined by a reliable technique. Two established and extensively used methods for determining yield stress were c
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33

Fan, Xijun. "Numerical study on some rheological problems of fibre suspensions." Thesis, The University of Sydney, 2006. http://hdl.handle.net/2123/1096.

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This thesis deals with numerical investigations on some rheological problems of fibre suspensions: the fibre level simulation of non-dilute fibre suspensions in shear flow; the numerical simulation of complex fibre suspension flows and simulating the particle motion in viscoelastic flows. These are challenging problems in rheology. Two numerical approaches were developed for simulating non-dilute fibre suspensions from the fibre level. The first is based on a model that accounts for full hydrodynamic interactions between fibres, which are approximately calculated as a superposition of the long
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34

Fan, Xijun. "Numerical study on some rheological problems of fibre suspensions." School of Aerospace, Mechanical & Mechatronic Engineering, 2006. http://hdl.handle.net/2123/1096.

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Doctor of philosophy (Ph D)<br>This thesis deals with numerical investigations on some rheological problems of fibre suspensions: the fibre level simulation of non-dilute fibre suspensions in shear flow; the numerical simulation of complex fibre suspension flows and simulating the particle motion in viscoelastic flows. These are challenging problems in rheology. Two numerical approaches were developed for simulating non-dilute fibre suspensions from the fibre level. The first is based on a model that accounts for full hydrodynamic interactions between fibres, which are approximately calculated
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35

Hammarström, David. "A Model for Simulation of Fiber Suspension Flows." Licentiate thesis, KTH, Mechanics, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1744.

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<p>The fiber suspensions in the production line from wood topaper are subjected to many types of chemical and mechanicalprocesses, in which the flow of the suspension is of vitalimportance. The flow of the suspension determines the degree ofuniformity of the fibers through the processing, which inreturn affects the properties of the fiber suspension. In orderto optimise the process, thorough knowledge of the suspensionflow is necessary, both on the level of suspension, fibernetworks and individual fibers. Knowledge of the fibersuspension behaviour combined with commercial CFD simulationprovide
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36

Salahuddin, Asif. "Orientation and rotational diffusion of fibers in semidilute suspension." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41163.

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The dynamics of fiber orientation is of great interest for efforts to predict the microstructure and material properties of a suspension flow system. In this research a fiber-level, hybrid simulation method, LBM‒EBF (coupled lattice‒Boltzmann method with the external boundary force method) is undertaken to advance the current understanding of the hydrodynamic interaction induced rotational diffusion mechanism for rigid fibers in semidilute suspension of low Reynolds number flow. The LBM‒EBF simulations correctly predict the orbit constant distribution of fibers in a sheared semidilute suspensi
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37

Joung, Clint G. "Direct simulation studies of suspended particles and fibre-filled suspensions." Connect to full text, 2003. http://hdl.handle.net/2123/554.

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Thesis (Ph. D.)--University of Sydney, 2004.<br>Title from title screen (viewed 16 April 2008). Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the School of Aerospace, Mechanical and Mechatronic Engineering. Degree awarded 2004; thesis submitted 2003. Contains published article co-authored by Joung. Includes bibliographical references. Also available in print form.
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38

Krochak, Paul Joseph. "The orientation state of semi-dilute rigid fibre suspensions in a linearly contracting channel." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/842.

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This work investigates the effects of long range hydrodynamic fibre-fibre interactions on the orientation state of a semi-dilute, rigid fibre suspension flowing through a linear contracting channel under laminar flow conditions. The effects of fibre-fibre interactions are modeled mathematically, the governing equations solved numerically and the predicted results compared with experimental observations. The theoretical model is based on the assumption that the orientation state of the suspension can be completely described by a probability distribution function and that fibre-fibre interactio
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39

Soszyński, Robert Marian. "The formation and properties of coherent flocs in fibre suspensions." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/27544.

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Fibres in concentrated suspensions are in continuous contact with other fibres and may interlock through elastic bending to form coherent networks. Such interlocking is termed Type-C cohesion. The process by which Type-C cohesion forms among fibres and the resulting structure and tensile strength of individual floes of fibres have been examined in experimental study in which relatively straight, smooth nylon (6-6) fibres of aspect ratios from 65 to 189 were suspended in aqueous-sugar solutions. The fibres were in most cases neutrally buoyant. The suspensions were caused to flow in a partially
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40

Plikas, Atanasis. "Numerical modeling of fibre suspensions in grid-generated turbulent flow." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0023/MQ50361.pdf.

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41

Guiraud, Olivier. "Rhéologie des suspensions concentrées de fibres : application à la mise en forme des matériaux composites." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00680734.

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Cette étude porte sur la mise en forme des matériaux composites renforcés par des fibres ou des mèches de fibres courtes tels que les SMC ou les BMC. Un travail expérimental a dans un premier temps été réalisé à l'échelle macroscopique. Ce travail a permis de mettre au point un rhéomètre de compression lubrifiée ainsi que des méthodes d'essais et de dépouillement. Ceci permet de mieux caractériser la rhéologie des compounds SMC et BMC en traitant les problématiques de leur compressibilité et des frottements éventuels entre les parois du rhéomètre et la matière déformée. Un travail numérique a
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42

Ruys, Victor. "Rhéologie des résidus agricoles pour un procédé multi-étapes de méthanisation en voie sèche." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAI064/document.

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Rhéologie des résidus agricoles pour un procédé de méthanisation par voie sèche multi-étapes.Le procédé Arkométha® utilise à profit l’injection de biogaz pour mélanger les résidus agricoles (fumier, lisier, ensilage, etc…) lors d’un procédé de méthanisation en voie sèche dans lequel la matière est épaisse. La connaissance des propriétés rhéologiques de ces matériaux, rarement étudiés dans la littérature, notamment à l’échelle industrielle, est un élément indispensable pour maitriser et contrôler le processus de mélange. Cette thèse a pour objectif de développer la compréhension des évolutions
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43

Shaikh, Saif. "Dynamics and rheology of concentrated suspensions of rigid fibers." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0495.

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Une étude combinant expériences et analyses est menée afin de rationaliser la dynamique et la rhéologie des suspensions très concentrées de fibres rigides, non colloïdales dans un fluide newtonien. Des mesures rhéologiques couplées à des mesures de la microstructure sont réalisées à l’aide de plusieurs dispositifs expérimentaux permettant d’analyser différents types de géométries et d’écoulements. Des expériences de rhéologie standards (rhéologie à volume contrôlé), ainsi qu’une méthode de rhéologie non-conventionnelle (rhéologie à pression contrôlée) sont associées afin de mesurer la contrain
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44

Fällman, Monika Carina. "Turbulence measurements in fiber suspension flows : experimental methods and results." Stockholm : Skolan för teknikvetenskap, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11460.

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45

Çobi, Alban C. (Alban Chris). "Design of a carbon fiber suspension system for FSAE applications." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/74433.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 35).<br>Reducing weight while maintaining structural integrity is one of the key challenges Formula SAE teams face as they try and design the suspension of the formula car. The purpose of this paper is to present experimental data on designing and optimizing a carbon fiber suspension system for formula cars. The reason carbon fiber suspensions are favored over the current steel suspensions is because of they can reduce
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46

Aitomäki, Yvonne. "Towards a measurement of paper pulp quality : ultrasonic spectroscopy of fibre suspensions." Licentiate thesis, Luleå tekniska universitet, EISLAB, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18216.

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For the paper and pulp industry in Sweden and Finland to remain competitive against countries with lower overheads, they have to constantly strive to improve the quality and the efficiency of the manufacturing processes. One of the ways of doing this is to introduce sensors that will provide valuable online feedback on the characteristics of the pulp so that adjustments can be made to optimise the manufacturing process. The measurement method proposed in this thesis is based on ultrasound, since it is rapid, inexpensive, non-destructive and non-intrusive. Thus could be done online. Since ultra
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47

Aitomäki, Yvonne. "Towards a measurement of paper pulp quality : ultrasonic spectroscopy of fibre suspensions /." Luleå : Luleå tekniska universitet/Systemteknik/EISLAB, 2006. http://epubl.ltu.se/1402-1757/2006/20/index.html.

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Pintossi, Marco. "Carbon fiber reinforced composite suspensions for a solar vehicle." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/20564/.

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Questa tesi si svolge nell’ambito di progettazione CAD e produzione di componenti per il settore dell’automotive in CFRP, in questo particolare caso, per un’auto elettrica a pannelli solari. Il lavoro da me svolto, aperto con una panoramica generale sulle tecnologie a basse emissioni oggi disponibili, è stato fatto a seguito di un percorso personale divisibile in tre fasi principali iniziate nel 2018 con la collaborazione alla costruzione della vettura Emilia 4, con la quale l’Università ha preso parte all’ASC 2018, una gara tenutasi in America, che ci ha visti vincitori della categoria crui
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Modgi, Shivamurthy. "Interaction of fibres and additives in mechanical pulp suspensions." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/31434.

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Precipitated calcium carbonate (PCC) is used in the production of high value communication papers from thermo-mechanical pulp (TMP) suspensions to improve optical properties like opacity and brightness. Addition of PCC also reduces the cost of papermaking. However, the increasing use of PCC in producing high value communication papers from bleached TMP has resulted in the requirement for using cationic starch as a strength enhancing agent. Starch addition compensates for the strength loss due to addition of PCC. This thesis examines the interactions of TMP fibres, PCC, starch and other additiv
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Jalayer, Mazyar. "Energy reduction in pumping low consistency pulp fiber suspensions." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/39531.

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Liquid transport is a vital segment of the economy. Pumping systems – whether used at a pulp and paper mill to transfer pulp stock, to pump petroleum through cross country pipeline or to transport tailings from a mine processing plant to a disposal site – are often one of the largest consumers of electrical energy. This thesis studies energy reduction in pumping low consistency fibre suspensions. The methods and procedures described in this work are applicable to any process where pumps are utilized. The main focus is on centrifugal pumps, the most commonly used pump at processing plants. Two
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