Dissertations / Theses on the topic 'Liquid-liquid flows'
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Hasan, Norpa'iza Mohamad. "Stratifying liquid-liquid flows." Thesis, University of Nottingham, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.440994.
Full textSimmons, Mark John Harry. "Liquid-liquid flows and separation." Thesis, University of Nottingham, 1998. http://eprints.nottingham.ac.uk/27793/.
Full textAngeli, Panagiota. "Liquid-liquid dispersed flows in horizontal pipes." Thesis, Boston Spa, U.K. : British Library Document Supply Centre, 1996. http://ethos.bl.uk/OrderDetails.do?did=1&uin=uk.bl.ethos.321543.
Full textLiu, Lan. "Optical and computational studies of liquid-liquid flows." Thesis, Imperial College London, 2005. http://hdl.handle.net/10044/1/7937.
Full textHussain, Siti Aslina. "Experimental and computational studies of liquid-liquid dispersed flows." Thesis, Imperial College London, 2004. http://hdl.handle.net/10044/1/7998.
Full textYusoff, Nazrul Hizam. "Stratifying of liquid-liquid two phase flows through sudden expansion." Thesis, University of Nottingham, 2012. http://eprints.nottingham.ac.uk/12939/.
Full textCostigan, G. "Flow pattern transitions in vertical gas - liquid flows." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361925.
Full textYang, Limin. "Liquid-liquid two-phase flows at T-junctions and through expansions." Thesis, University of Nottingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.404047.
Full textMorgan, Rhys Gareth. "Studies of liquid-liquid two-phase flows using laser-based methods." Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/10145.
Full textBadeau, Allen E. "A droplet formation and entrainment model for stratified liquid-liquid flows." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1737.
Full textTitle from document title page. Document formatted into pages; contains xiii, 150 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 140-144).
Zhao, Liqiang. "Liquid film flows over complex surfaces /." Access abstract and link to full text, 1991. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/9123415.
Full textMoore, Bryce Kirk. "Gas-liquid flows in adsorbent microchannels." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47519.
Full textZenit, Camacho José Roberto Hunt Melany L. "Collisional mechanics in solid-liquid flows /." Diss., Pasadena, Calif. : California Institute of Technology, 1998. http://resolver.caltech.edu/CaltechETD:etd-08122005-140811.
Full textKoos, Erin Crystal Hunt Melany L. Hunt Melany L. "Rheological measurements in liquid-solid flows /." Diss., Pasadena, Calif. : Caltech, 2009. http://resolver.caltech.edu/CaltechETD:etd-03032009-092653.
Full textAbdulahi, Abolore. "Investigating the effect of liquid viscosity on two-phase gas-liquid flows." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/30935/.
Full textSchmidt, Patrick. "Interfacial dynamics in counter-current gas-liquid flows." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/23474.
Full textVARGES, PRISCILLA RIBEIRO. "LIQUID-LIQUID DISPLACEMENT FLOWS IN A HELE-SHAW CELL INCLUDING NON-NEWTONIAN EFFECTS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2010. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=16992@1.
Full textEstudou-se neste trabalho o deslocamento de fluidos em meios porosos utilizando células de Hele-Shaw. Especificamente, investigou-se experimentalmente o deslocamento de um fluido não newtoniano por um newtoniano em uma célula retangular de Hele-Shaw. A instabilidade de Saffman-Taylor ou viscous fingering é um fenômeno observado quando um fluido de menor viscosidade desloca um de maior viscosidade, e a célula de Hele-Shaw é uma ferramenta conveniente para a sua observação. Esse fenômeno é muito importante em diversas aplicações, como por exemplo: recuperação secundária e terciária de petróleo, invasão de fluidos de perfuração em meios porosos, fraturamento hidráulico, processamento de polímeros, hidrologia e filtração. É vasta a literatura relativa ao estudo de fluidos newtonianos e não newtonianos deslocados por ar em células de Hele-Shaw. Entretanto, existem poucos trabalhos envolvendo deslocamentos de líquidos com viscosidades comparáveis, ou seja, razão de viscosidade diferente de zero. Apresentou-se o detalhamento do projeto de construção de uma célula de Hele-Shaw aplicável ao deslocamento de um líquido por outro líquido. A evolução da forma da interface foi analisada, através de uma câmera fotográfica, em função dos parâmetros geométricos, dinâmicos e reológicos. A partir da vetorização da forma da interface, determinou-se a eficiência do deslocamento. Sendo assim, foi definido o espectro de situações em que há formação de fingers e plugs relativos ao deslocamento de goma xantana por um óleo mineral. Não há na literatura uma convenção universal para apresentação dos resultados, logo uma contribuição original refere-se à adimensionalização proposta onde os principais parâmetros governantes são a velocidade adimensional, o número de capilaridade reológico e o índice de comportamento da goma xantana. Observou-se que para um valor constante do índice de comportamento e para um valor do número de capilaridade reológico da ordem de 10-1, a eficiência de deslocamento aumenta com a velocidade adimensional, porque a razão de viscosidade diminui.
This work studied the displacement of fluids in porous media using a Hele-Shaw cell. Specifically, was investigated experimentally the displacement of a non-Newtonian fluid by a Newtonian in a rectangular Hele-Shaw cell. The Saffman-Taylor or viscous fingering instability occurs when one fluid pushes a more viscous one, and a Hele-Shaw is a convenient tool to the phenomenon observation. Applications include displacement of heavy crude oil in reservoirs, drilling fluid invasion through porous media, fracture conductivity, polymer processing, hydrology and filtration. The Saffman-Taylor instability has been extensively studied for Newtonian and non-Newtonian liquids displaced by air in a Hele-Shaw cell. However displacement flows involving two liquids of comparable viscosity (nonzero viscosity ratio) have received very little attention. It was presented the details of construction of a Hele-Shaw applicable to a liquid-liquid displacement. The evolution of the shape of the interface was analyzed through a digital camera, as a function of the geometric, dynamic and rheological parameters. From tracing the shape of the interface, was determined the displacement efficiency. Thus, it was defined the spectrum of situations in which there is formation of fingers and plugs relating to displacement of xanthan gum by a mineral oil. There is no universal convention in the literature for presenting the results so a original contribution concerns the proposed dimensionless parameters. The main parameters that govern this flow are the dimensionless flow rate, the rheological capillary number and the behavior index of xanthan gum. It was observed that for a constant value of the behavior index and for a rheological capillary number of magnitude of 10-1, the displacement efficiency increases with the dimensionless flow rate, because the viscosity ratio decreases.
AZEVEDO, PATRICIA EMIDIO DE. "LIQUID-LIQUID DISPLACEMENT FLOWS IN A HELE-SHAW CELL INCLUDING NON-NEWTONIAN EFFECTS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2015. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=26868@1.
Full textCONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
A perfuração de poços de petróleo, principalmente em ambientes offshore, é uma operação que demanda um custo muito elevado, portanto a minimização de problemas e danos ao reservatório produtor é muito importante. O projeto de um fluido de perfuração que garanta a mínima invasão na rocha reservatório é um tópico fundamental, como consequência a indústria petrolífera tem investido em estudos com o intuito de evitar que este problema ocorra. Sendo assim, nesse trabalho estudou-se o escoamento de fluidos em um meio poroso ideal, a célula de Hele-Shaw. Para realizar esse trabalho foram utilizados dois fluidos não newtonianos: uma solução aquosa de um polímero flexível, a poliacrilamida; e uma solução aquosa de um polímero rígido, a goma xantana. Esses fluidos não newtonianos representaram o fluido de perfuração, já o papel do petróleo presente na rocha reservatório foi desempenhado pelo óleo mineral. A partir desse experimento é possível observar a instabilidade de Saffman-Taylor ou viscous fingers, que é um fenômeno observado quando um fluido de menor viscosidade desloca outro de maior viscosidade. Esse fenômeno é muito importante em diversas aplicações, tais como: invasão de fluido de perfuração em meios porosos (caso que será estudado), recuperação secundária e terciária de petróleo, fraturamento hidráulico, processamento de polímeros, hidrologia e filtração. O experimento consiste em analisar a evolução da interface entre os dois fluidos através de uma câmera filmadora. A partir das imagens é determinada qualitativamente a eficiência do deslocamento. Com o conjunto de imagens é possível observar também em quais parâmetros dinâmicos e reológicos ocorre a transição fingers (interface instável) para plug (interface estável), e viceversa. Também foram realizados testes reológicos nos quais foi possível conhecer o comportamento dos fluidos não newtonianos utilizados. Com base nos dados coletados observou-se que tanto para a poliacrilamida quanto para a goma xantana a transição ocorre a uma taxa de cisalhamento adimensional próxima de 3.
The drilling of oil wells, particularly in offshore environments, is an operation which demands a high cost, thus, the minimization of problems and damage to the producing reservoir is very important. The design of a drilling fluid that ensures minimum invasion into the reservoir rock is a major topic, consequently the oil industry has invested in research in order to prevent this problem from occurring. Therefore, this research studied the displacement of fluids in an ideal porous medium, a Hele-Shaw cell. To accomplish this task, the following two non-Newtonian fluids were used: an aqueous solution of a flexible polymer, polyacrylamide; and the other an aqueous solution of a rigid polymer, xanthan gum. Such non-Newtonian fluids represent the drilling fluid, while the function of oil present in the reservoir rock was represented by mineral oil. From this experiment it is possible to observe the Saffman-Taylor instability or viscous fingers, which is a phenomenon observed when a low viscosity fluid displaces a higher viscosity fluid. This phenomenon is very important in many applications, such as drilling fluid invasion in porous media, secondary and tertiary oil recovery, hydraulic fracturing, polymer processing, hydrology and filtration. The experiment consists in analyzing the evolution of the interface between two fluids through a digital camera, and determining the displacement efficiency qualitatively from the imagens. With the set of images is possible to observe in which dynamic and rheological parameters the transition from fingers (unstable interface) to plug (stable interface) occurs, and vice versa. Also, rheological tests were performed in which it was possible to know the behavior of non-Newtonian fluids used in the study. From the data collected it was observed that both the polyacrylamide and for xanthan gum transition occurs near the dimensionless shear rate of 3.
Hardwick, Robert Carlton. "Experimental studies of solid/liquid pipe flows." Thesis, Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/33430.
Full textBrotherton-Ratcliffe, Rupert Victor. "Boundary-layer effects in liquid-layer flows." Thesis, University College London (University of London), 1987. http://discovery.ucl.ac.uk/1317966/.
Full textSchuricht, Paul Hans. "Liquid crystal thermography in high speed flows." Thesis, University of Southampton, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310549.
Full textKenny, Richard Gerrard. "Liquid metal flows through non-uniform magnetic fields." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358643.
Full textGeraci, Giorgio. "Gas-liquid flows in inclined pipes and venturis." Thesis, University of Nottingham, 2006. http://eprints.nottingham.ac.uk/14313/.
Full textMankad, Sunil. "Heat transfer in two phase solid-liquid flows." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307988.
Full textBadie, Shahrokh. "Horizontal stratifying annular gas liquid flow." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249385.
Full textWilson, Wesley M. "The development of a droplet formation and entrainment model for simulations of immiscible liquid-liquid flows." Morgantown, W. Va. : [West Virginia University Libraries], 1999. http://etd.wvu.edu/templates/showETD.cfm?recnum=1161.
Full textTitle from document title page. Document formatted into pages; contains xvi, 219 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 166-169).
Sanna, Francesco. "Interaction between Flow Induced Pulsations and Multiphase Flows in Gas Liquid Systems." Thesis, Le Mans, 2016. http://www.theses.fr/2016LEMA1008/document.
Full textCoupling between flow instabilities and acoustic resonances in ducts with closed side branches leads to Flow Induced Pulsations (FIPs). This is a typical phenomenon in engineering applications (gas transport systems, compressor installations, and chemical plants). The objective of this work is to extend the knowledge about FIPs when the transported medium is not uniquely gas but a combination of gas and (a small quantity of) liquid. For two configurations of double side branches (in tandem and in quasi-cross), the amplitude of pressure pulsations in the side branches was measured for different liquid injection rates. This was repeated with the liquid injection point located at different places to allow different flow regimes at the pipe connections. The results show a strong effect of the water content on the pulsations. On basis of these results and additional measurements, the following hypotheses for the effect of liquid were made: (1) interaction of the liquid with the flow instability and (2) increase of the acoustical damping in the ducts in presence of liquid.The effect of liquid on damping was measured with a dedicated test setup designed to have a stratified flow. It was found that the liquid always increases the acoustical damping, mainly due to the reduction of the effective cross section by the liquid, and because of the increased turbulent friction at the interface between gas and liquid
Miller, Ryan Michael. "Continuum Modeling of Liquid-Solid Suspensions for Nonviscometric Flows." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4864.
Full textHale, Colin Paul. "Slug formation, growth and decay in gas-liquid flows." Thesis, Imperial College London, 2000. http://hdl.handle.net/10044/1/8550.
Full textChoate, Eric P. Forest M. Gregory. "Small amplitude oscillatory flows of nematic liquid crystal polymers." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2007. http://dc.lib.unc.edu/u?/etd,835.
Full textTitle from electronic title page (viewed Dec. 18, 2007). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Mathematics." Discipline: Mathematics; Department/School: Mathematics.
Shetty, Sanat Achanna. "Liquid spreading and thin film flows over complex surfaces /." Access abstract and link to full text, 1995. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/9610610.
Full textRoy, Ajoy Krishna. "Application of smooth particle hydrodynamics to solid-liquid flows." Thesis, University of Surrey, 2002. http://epubs.surrey.ac.uk/2108/.
Full textOddie, G. M. "The characterisation of multicomponent (liquid) flows using scattered ultrasound." Thesis, Cranfield University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333538.
Full textWilliams, Harvey Alec Rodney. "Two-dimensional surfactant-driven flows of thin liquid films." Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.625029.
Full textMenghini, Filippo <1989>. "Advanced Computational Fluid Dynamics models for liquid metal flows." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7505/.
Full textEscrig, Josep. "Influence of geometrical parameters on gas-liquid intermittent flows." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/47085/.
Full textBühler, Leo. "Three-dimensional liquid metal flows in strong magnetic fields." Karlsruhe Forschungszentrum Karlsruhe, 2008. http://d-nb.info/991370600/34.
Full textBurt, Andrew C. "A computational study of mixing in stratified liquid-liquid flows using analogy between heat and mass transfer." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=1948.
Full textTitle from document title page. Document formatted into pages; contains x, 76 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 71-72).
Hau, Lap Wing. "Electrokinetically-driven liquid flows in microchannels using surface-chemistry technology /." View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?MECH%202005%20HAU.
Full textMonsen, Gisle Otto Tviberg. "Modeling of a centrifugal separator for dispersed gas-liquid flows." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18678.
Full textLee, Betty. "Dynamic response of small turbine flowmeters in pulsating liquid flows." Thesis, Brunel University, 2002. http://bura.brunel.ac.uk/handle/2438/4971.
Full textSultan, Khaled M. "The propagation of pressure waves in two-phasegas/liquid flows." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0004/MQ42100.pdf.
Full textLaforgia, Antonio. "Modelling of gas-liquid annular flows at high mass fluxes." Thesis, Imperial College London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.415910.
Full textAdechy, Didier. "Phase separation in annular gas-liquid flows at t-junctions." Thesis, Imperial College London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251963.
Full textVan, der Meulen Gerrit Pieter. "Churn-annular gas-liquid flows in large diameter vertical pipes." Thesis, University of Nottingham, 2012. http://eprints.nottingham.ac.uk/12581/.
Full textKolb, Kelly Jean. "Modeling Bright Gully Deposits' Formation in Hale Crater, Mars: Implications for Recent Liquid Water." Thesis, The University of Arizona, 2008. http://hdl.handle.net/10150/193349.
Full textCeballos, Castillo Carlos Alberto. "Multidisciplinary design approach and safety analysis of ADSR cooled by buoyancy driven flows." Delft : Delft University Press, 2007. http://www.loc.gov/catdir/toc/fy0712/2007276538.html.
Full text"Proefschrift ter verkrijging van de graad van doctor aan de Technische Universiteit Delft." Includes bibliographical references (p.120-128) and index.
Omgba-Essama, C. "Numerical modelling of transient gas-liquid flows (application to stratified & slug flow regimes)." Thesis, Cranfield University, 2004. http://hdl.handle.net/1826/1057.
Full textRenault, Fabien. "A Lagrangian Slug Capturing Scheme for Gas-Liquid Flows in Pipes." Doctoral thesis, Norwegian University of Science and Technology, Department of Energy and Process Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1754.
Full textIn this thesis a new Lagrangian numerical scheme for the simulation of gas-liquid flows in pipelines is presented. Based on an approximate two-fluid model, this new scheme, called LASSI (Lagrangian Approximate Scheme for Slug Initiation) is dedicated to the modelling of the transition between stratified and slug flow. It is able to capture directly the slug initiation process and to track the motion of every single slug in the pipe without numerical diffusion. It can thus be qualified as a slug capturing and slug tracking scheme.
The scheme is based on the decoupling between the fast pressure dynamics governing the motion of the slugs and the much slower liquid transport in the bubbles. The liquid motion in the bubbles is then approximately modelled by a modified version of the shallow water equations, in which the influence of the Bernoulli suction force is subtracted from the traditional hydrodynamical term. The fully Lagrangian structure of the scheme makes it possible to accurately capture the transport of the fast interfacial waves whose growth can eventually result in a slug initiation.
The model predictions are compared with some experimental results obtained in the NTNU multiphase flow laboratory or taken from the literature. Several flow conditions are considered, in particular the case of hydrodynamic slugging in near-horizontal flows, slugging in an upwards pipe, severe slugging, and slugging triggered by fast transients. Numerical predictions are also compared with theoretical considerations regarding the stability of stratified flow.
Gomaa, Hassan [Verfasser]. "Modeling of Liquid Dynamics in Spray Laden Compressor Flows / Hassan Gomaa." München : Verlag Dr. Hut, 2014. http://d-nb.info/1064560040/34.
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