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Tesi sul tema "Mixing"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Larsson, Stefan. "Mixing Processes for Ground Improvement by Deep Mixing." Doctoral thesis, KTH, Civil and Architectural Engineering, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3667.

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<p>The thesis is dealing with mixing processes havingapplication to ground improvement by deep mixing. The mainobjectives of the thesis is to make a contribution to knowledgeof the basic mechanisms in mixing binding agents into soil andimprove the knowledge concerning factors that influence theuniformity of stabilised soil.</p><p>A great part of the work consists of a literature surveywith particular emphasis on literature on the processindustries. This review forms a basis for a profounddescription and discussion of the mixing process and factorsaffecting the process in connection with deep m

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2

Fangary, Yassar Saad. "Characterisation of mixing processes using PEPT/fluid mixing." Thesis, University of Birmingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343875.

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PEPT (positron emission particle tracking) is a technique for tracking a small radioactive tracer in Lagrangian co-ordinates. The technique was used to study the flow patterns of non-Newtonian CMC (Carboxy Methyl Cellulose) solutions inside a vessel agitated by an axial flow impeller. The 'non-intrusive' PEPT technique uses two position-sensitive detectors to track a radioactive particle in space and time. The particle is labelled with a positron emitting isotope. Once emitted from the nucleus a positron annihilates with an electron releasing energy in the form of two 511 keV back-to-back gamm

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3

Morgavi, Daniele. "Magma mixing." Diss., Ludwig-Maximilians-Universität München, 2014. http://nbn-resolving.de/urn:nbn:de:bvb:19-165555.

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In order to increase our understanding of magma mixing processes and their impact on the geochemical evolution of silicate melt we present in the following works, the first set of experiments performed using natural basaltic and rhyolitic melts. In particular, we investigate the interplay of physical dynamics and chemical exchanges between these two melts using time-series mixing experiments performed under controlled, chaotic, dynamical conditions. The variation of major and trace elements is studied in detail by electron microprobe (EMPA) and Laser Ablation ICP-MS (LA-ICP-MS) and the time-ev

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4

Ogasahara, Atsushi. "Discrete flavor symmetry for lepton mixing and quark mixing." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/189340.

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5

Hammond, Edward Vickers 1974. "Multi-modal mixing : gestural control for musical mixing systems." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/69188.

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Thesis (S.M.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2000.<br>Includes bibliographical references (p. 51-53).<br>The hi-end tools available to today's sound designers give them almost limitless control over audio processing. Devices such as Yamaha's new digital mixers and Digidesign's Pro-Tools computerized editing workstations allow users in a small studio to accomplish tasks which would have required racks full of gear only seven years ago in a professional studio. However, the evolution of the interfaces used with the

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6

De, Vriendt Kevin. "Mixing and chemical reaction hotspots in saline-freshwater mixing zones." Doctoral thesis, Universitat Politècnica de Catalunya, 2021. http://hdl.handle.net/10803/672312.

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Seawater intrusion presents one of the most unique and ubiquitous groundwater problems in the field of hydrogeology. Its complex boundary conditions coupled with variable density flow results in non-uniform flow which lead to non-trivial mixing dynamics. The mixing of fresh and saline waters in the subsurface is known to play a key role in an array of geochemical reactions. Such reactions include the dissolution and precipitation of calcite which shape the coastal landscape over millennia, as well as reactions associated to anthropogenic contamination of coastal groundwater such as nitrogen re

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7

Pandey, Vivek. "Extensional Mixing Elements for Improved Dispersive Mixing in Extrusion Operations." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1591698465031928.

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8

Flohr, Jamin. "Massless neutrino mixing /." [St. Lucia, Qld.], 2006. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe19503.pdf.

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9

Bennington, Chad Patrick Joseph. "Mixing pulp suspensions." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28622.

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Initiation and maintenance of motion within a pulp suspension is necessary for effective mixing. This requires imposition of forces greater than the network strength and depends on suspension rheology once motion begins. As pulp suspensions display non-Newtonian and solid-like behaviour, studies were conducted using profiled rotors which imposed stress within the body of suspensions contained in cylindrical devices. A concentric cylinder device capable of high torques (85 N-m) and high rotational speeds (524 rad/s) was built to study pulp suspension dynamic behaviour. Most work used a profil

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10

Cereceda, Luis. "Mixing graph colourings." Thesis, London School of Economics and Political Science (University of London), 2007. http://etheses.lse.ac.uk/131/.

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This thesis investigates some problems related to graph colouring, or. more precisely. graph re-colouring. Informally, the basic question addressed can be phrased as follows. Suppose one is given a graph G whose vertices can be properly k-coloured. for some k > 2. Is it possible to transform any k-colouring of G into any other by recolouring vertices of G one at a time, making sure a proper k-colouring of G is always maintained? If the answer is in the affirmative, G is said to be k-mixing. The related problem of deciding whether, given two k-colourings of G7 it is possible to transform one in

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11

Young, Katherine Irene. "Controls on Mixing and Non-Mixing Dependent Denitrification in River Hyporheic Zones." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/56615.

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Increases in reactive nitrogen from human actions have led to negative impacts on surface water (SW) and groundwater (GW) quality, and it is important to better understand denitrification processes in aquatic systems. The hyporheic zone has unique biogeochemical conditions, and is known to attenuate contaminants originating from SW and traveling through the hyporheic zone, together with necessary reactants. However, the ability of the hyporheic zone to attenuate contaminants from deeper upwelling GW plumes as they exit to SW is less understood. I used MODFLOW and SEAM3D to simulate hyporhei

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12

Cardoso, Silvana. "Mixing in geophysical flows." Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321097.

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13

Christodoulides, Jacqueline S. "Mixing in anaerobic digesters." Thesis, University of Southampton, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.533276.

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14

Lee, Shung-wai, and 李崇偉. "Mixing narratives and commentaries." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B4269453X.

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15

Li, Yan Sheng. "Mixing in axial compressors." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334235.

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16

Orme, Belinda Abigail Amanda. "Biological mixing and chaos." Thesis, University of Birmingham, 2002. http://etheses.bham.ac.uk//id/eprint/7637/.

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We consider a problem from the field of biological fluid mechanics which considers the flow associated with the motion of a flagellum on a sessile micro-organism. Motivation is taken from the movement of fluid around a species of choanoflagellate, \(Salpingoeca\) \(Amphoridium\). Choanoflagellates are a class of organism in the phylum Protozoa. Because the length scales and velocities are very low, the flow is one dominated by viscous forces and the environment is characterised by a low Reynolds number. The flow caused by the flagellum is initially modelled via a point force. These microorgani

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17

Ramsay, John Andrew. "Mixing of viscoelastic fluids." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7333/.

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This work investigates the laminar mixing performance of viscoelastic fluids in laboratory-scale batch stirred tanks agitated by “butterfly” impellers and in-line Kenics KM static mixers. Constant-viscosity viscoelastic (Boger) fluids were formulated to investigate viscous and elastic effects separately; multiphase viscoelastic suspensions were formulated from 40-50 volume% glass spheres in glycerol. Particle Image Velocimetry in stirred tanks agitated by high impeller-to-tank diameter ratio butterfly impellers (D/T=0.98) showed that secondary flows in Boger fluid increased solid body rotation

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18

Abernathey, Ryan (Ryan Patrick). "Mixing by ocean eddies." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/70772.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 163-175).<br>Mesoscale eddies mix and transport tracers such as heat and potential vorticity laterally in the ocean. While this transport plays an important role in the climate system, especially in the Southern Ocean, we lack a, comprehensive understanding of what sets mixing rates. This thesis seeks to advance this understanding through three related studies. First, mixing rates are diagnosed fro

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19

Day, Jason J. "Topologically Mixing Suspension Flows." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8389.

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We find a set of conditions on a roof function to ensure topological mixing for suspension flows over a topological mixing base. In the measure theoretic case, such conditions have already been established for certain flows. Specifically, certain suspensions are topologically mixing if and only if the roof function is not cohomologous to a constant. We show that an analogous statement holds to establish topological mixing with the presence of dense periodic points. Much of the work required is to find properties specific to the equivalence class of functions cohomologous to a constant. In

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20

Bachir, Mazen Georges. "Ultrasonic enhancement of mixing." Thesis, University of Manchester, 2004. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.518863.

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21

Latini, Marco. "Mixing in Curved Pipes." Scholarship @ Claremont, 2001. https://scholarship.claremont.edu/hmc_theses/129.

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Over the previous summer I studied mixing of a passive tracer by flow in a straight cylindrical pipe, under the supervision of prof. Bernoff. The mixing process can be thought of as the successive action of advection by the fluid flow and diffusion modeled by random walks. With this method we were able to distinguish three different regimes. For short times, diffusion is more relevant than advection and we observed a Gaussian longitudinal distribution of the concentration. In an intermediate regime, advection by the shear is dominant over longitudinal diffusion and we observed a distinctively

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22

Monclova, Luis A. "Numerical simulation of a pipeline tee mixer." Thesis, Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/11023.

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23

Hug, Stephan Nicholas. "Scalar mixing and coherent structures in simulations of the plane turbulent mixing layer." Thesis, University of Leicester, 2018. http://hdl.handle.net/2381/42162.

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For more than half a century turbulent mixing layers have been the subject of intense experimental and numerical investigation. With the discovery of primary, spanwise aligned and secondary, streamwise oriented vortices the interest in low and high Reynolds number mixing layers has been invigorated. The immense increase of computational capabilities in recent years has lead to an ever growing number of numerical simulations of mixing layers. However, numerical simulations have had great difficulties in reproductions the structure dynamics and entrainment mechanisms observed in the experiments.

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24

Chandler, John Wells Lyon Suzanne Elizabeth. "Spectral mixing of camouflaged targets /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA293623.

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25

Lai, Chung-kei Chris. "Mixing of inclined dense jets." Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B4423661X.

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26

Carter, Glenn S. "Turbulent mixing near rough topography /." Thesis, Connect to this title online; UW restricted, 2005. http://hdl.handle.net/1773/10976.

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27

Couchman, Ian Jesse. "Optimal control of fluid mixing." Thesis, Imperial College London, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520860.

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28

Liangrocapart, Sompong. "Non-linear spectral mixing models." Thesis, University of Surrey, 2001. http://epubs.surrey.ac.uk/842807/.

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In this research study, non-linear spectral mixing models have been developed and employed to achieve unmixing the proportions of components accurately and retrieving the physical parameters of the mixture. The first focus is on a comparative study of linear and non-linear spectral mixing models. A carefully-controlled experiment was conducted in the laboratory. The aim is to test both models to unmix ternary powdered-chalk mixtures by using the directional reflectance data. The results demonstrated the superiority of the non-linear model over the linear model. However, there was at least one

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29

Brotherton, C. M. "Mixing in polymeric microfluidic devices." Connect to online resource, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3256449.

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30

Finch, R. J. "Mechanical mixing of dental amalgam /." Title page, contents and summary only, 1992. http://web4.library.adelaide.edu.au/theses/09PH/09phf492.pdf.

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31

Distelhoff, Markus Friedrich Wilhelm. "Scalar mixing in stirred tanks." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265206.

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32

Glasgow, Craig I. "Mixing diagnostics using particle tracking." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244528.

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33

Al-Saleh, S. A. A. "Liquid mixing on sieve trays." Thesis, Swansea University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.635717.

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An investigation has been made based on the measurements of the concentration profiles found from dynamic experiments to study axial and transverse mixing on sieve trays operating under froth, mixed and spray regimes. Two methods of tracer injection were employed, the line and point source tracer injection, and the experiments were carried out over a wide range of gas and liquid flow rates. Air and water were used as system fluids. Two different configurations of columns were used in the dispersion work in order to study the effect of the experimental configuration upon dispersion characterist

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34

Lai, Chung-kei Chris, and 黎頌基. "Mixing of inclined dense jets." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B4423661X.

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35

Chandler, John Wells, and Suzanne Elizabeth Lyon. "Spectral mixing of camouflaged targets." Thesis, Monterey, California. Naval Postgraduate School, 1994. http://hdl.handle.net/10945/42789.

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Approved for public release, distribution unlimited<br>This thesis uses bivariate and multivariate analysis to estimate the factors that influence the effectiveness of U. S. Navy Medical Service Corps (MSC), Health Care Administrator (HCA) Inservice Procurement (IPP) and Direct Procurement (DP) Officer accession programs. Using data from the Navy Officer Master File, Navy Officer Loss File, and Navy Personnel Research and Development Center's Officer Fitness Report File, comparisons of the officers accessed though the DP and IPP are presented. Ordinary least square models estimate the influenc

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36

Shepherd, W. J. "Solute mixing in CSO structures." Thesis, University of Sheffield, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251253.

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37

Terrell, Michael John. "Perceptual mixing for musical production." Thesis, Queen Mary, University of London, 2012. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8647.

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A general model of music mixing is developed, which enables a mix to be evaluated as a set of acoustic signals. A second model describes the mixing process as an optimisation problem, in which the errors are evaluated by comparing sound features of a mix with those of a reference mix, and the parameters are the controls on the mixing console. Initial focus is placed on live mixing, where the practical issues of: live acoustic sources, multiple listeners, and acoustic feedback, increase the technical burden on the mixing engineer. Using the two models, a system is demonstrated that takes as inp

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38

Dapelo, Davide. "Gas mixing in anaerobic digestion." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/6879/.

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Mesophilic anaerobic digestion is one of the most used and successful technologies to treat the sludges resulting from wastewater treatment. However, traditional approaches to digester design are firmly rooted in empiricism and rule of thumb rather than science. Mixing is an energy-intensive operation, and therefore the need to lower the wastewater process carbon footprint requires searching how to lower the input mixing energy without compromising–and indeed enhancing–biogas production. In particular, the literature on gas mixing is still particularly poor. For the first time, an Euler-Lagran

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39

Sobel, Adam H. 1967. "Quantitative diagnostics of stratospheric mixing." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/57961.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1998.<br>Includes bibliographical references (p. 124-134).<br>by Adam Harrison Sobel.<br>Ph.D.

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40

Le, Floch-Yin François T. (François Thomas). "Entropy generation in fluid mixing." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/36169.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2006.<br>Includes bibliographical references (leaf 64).<br>This thesis describes the processes of viscous dissipation in two generic situations for mixing flows. The objective is to illustrate, with simple examples, details of the entropy generation processes that are captured in an overall manner by a control volume analysis. The two situations are parallel mixing flows in a duct and the evolution of a wake in a centrifugal compressor. Results are given for the evolution of the velocity profile and fo

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41

Davies, Nigel Howard. "Numerical representations of fluid mixing." Thesis, University of South Wales, 1993. https://pure.southwales.ac.uk/en/studentthesis/numerical-representations-of-fluid-mixing(3bf1cb31-ec80-49f2-95ae-a2f56eeeeec2).html.

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The work contained within this thesis is concerned with a theoretical investigatiop of both laminar and thermally driven types of cavity flow, together with an analysis of their associated mixing processes which find applications to Industrial mixing and also to the environment. The mixing efficiency has been viewed from two perspectives namely the tracking of a selection of fluid particles, and also the simulation of the dispersive mixing of a coloured fluid element as carried along by the flow. This thesis also incorporates features of both Newtonian and a wide range of non-Newtonian fluids.

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42

McLeod, Graham William. "Titanite zoning and magma mixing." Thesis, Connect to e-thesis, 2009. http://theses.gla.ac.uk/914/.

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Thesis (Ph.D.) - University of Glasgow, 2007.<br>Ph.D. thesis submitted to the Faculty of Physical Sciences, Department of Geographical and Earth Sciences, University of Glasgow, 2007. Includes bibliographical references. Print version also available.

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43

Sanganwar, Ganesh P. Gupta Ram B. "Environmentally benign mixing of nanoparticles." Auburn, Ala., 2009. http://hdl.handle.net/10415/1965.

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44

Yapo, Sylvain Achy. "Wavetrains in diverging mixing layers." Diss., The University of Arizona, 1991. http://hdl.handle.net/10150/298721.

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It is generally accepted that a linear stability theory, together with a slowly diverging base flow, can describe many of the characteristics of coherent structures in free shears flow. In this dissertation we model these two-dimensional instability waves as they travel in a slightly inhomogeneous steady and viscous unstable base flow. These unstable and inviscid wave packets are analysed using linear stability theory. The analysis is performed by separating the physical flow in two parts. In the first part, the instability waves are evolving in a parallel mixing layer and their solution serve

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45

Hashim, Shahrir. "Drop mixing in suspension polymerisation." Thesis, Loughborough University, 2001. https://dspace.lboro.ac.uk/2134/34911.

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Suspension polymerisation is one of the major processes used to produce polymers. In this process, monomer is suspended as liquid droplets in a continuous water phase by mean of strong agitation and the presence of a suspending agent. As the suspension polymerisation proceeds, the viscosity of a monomer–polymer droplet increases with conversion. Hence, the physical behaviour of the droplet changes during the process. When new dispersible material is added to the existing suspension drops, the new material and existing drops can remain segregated for significant amounts of time. This will affec

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46

Saub, B. A. Al-Shammarri. "Liquid mixing in reflux condensation." Thesis, University of Manchester, 2001. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.668175.

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47

MONOFY, AHMED MOSTAFA IBRAHEM MOSTAFA. "Mixing Processes in Hyporheic Sediments." Doctoral thesis, Politecnico di Torino, 2022. https://hdl.handle.net/11583/2973802.

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48

Wopat, Kathryn K. "Development of a to-scale fluid mixing visualization process for analysis of cold-flow mixing." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98752.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (page 34).<br>Torrefaction is a process by which low energy density biomass is converted to a higher energy density biofuel, called char. Small-scale torrefaction systems are a promising technology for developing countries where large amounts of biomass go underutilized due to inaccessibility and transportation costs. A by-product of torrefaction is volatile gas, thus, a system may be built to harness this otherwise was

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49

Yuan, Yiqing. "Jet Fluid Mixing Control Through Manipulation Jet Fluid Mixing Control Through Manipulation of Inviscid Flow Structures." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/28097.

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Rapid mixing is crucial for the efficient and environment-friendly operation of many industrial and propulsion devices involving jet flows. In this dissertation, two methodologies, self-excited nozzles and radially lobed nozzles, are studied and presented in order to enhance mixing in the near field of coflowing, subsonic, turbulent, free jet flows. The characteristics of the concentration field and the mixing performance are examined, mainly in quantitative manner. Two new parameters, mixing index and mixing efficiency index, are defined for free jets, allowing quantitative analysis of the mi

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50

Rask, Olaf Haller. "The Reduction of Mixing Noise and Shock Associated Noise using Chevrons and other Mixing Enhancement Devices." University of Cincinnati / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1223056142.

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