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Dissertations / Theses on the topic 'Two phase flow'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Kunda, Wilkinson. "Two phase problems and two phase flow." Thesis, University of Hull, 1986. http://hydra.hull.ac.uk/resources/hull:5902.

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In section 1 of this thesis a two-dimensional mathematical model is used to investigate the circulation in a gas-bubble agitation system of a cylindrical vessel for the case of an orifice located at the centre of the base. The two-phase (liquid/gas) region is assumed to be confined to a cone-shaped region and is investigated using Wallis' Drift Flux Model. In the single-phase (liquid) region the turbulent Navier-Stokes equations, written in terms of the stream function, are used for the mathematical model. The analysis in the two-phase region yields the boundary conditions on the two-phase/sin

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2

Ariyoshi, Gen. "Flow Characteristics of Lead-Bismuth Two-phase Flow." Kyoto University, 2019. http://hdl.handle.net/2433/242325.

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3

Whitaker, T. S. "Measurement of two-phase flows by phase separation." Thesis, University of Liverpool, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240831.

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4

Neuweiler, Insa. "Macroscopic parameters for two-phase flow." [S.l.] : [s.n.], 1999. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=13490.

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5

Dillon, Chad Michael. "Two-Phase Flow Within Narrow Annuli." Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5097.

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A study of two-phase flow in annular channels with annular gaps of less than 1 mm is useful for the design and safety analysis of high power density systems such as accelerator targets and nuclear reactor cores. Though much work has been done on pressure drop in two-phase flow, designers rely mostly on empirical models and correlations; hence, it is valuable to study their applicability for different channel sizes, geometries, and gas qualities. The pressure drop along a concentric annular test section was measured for cases of either constant quality or variable quality along its length (

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6

Srichai, Somprasong. "High pressure separated two-phase flow." Thesis, Imperial College London, 1994. http://hdl.handle.net/10044/1/8656.

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7

Sharma, Yugdutt. "Modeling transient two-phase slug flow /." Access abstract and link to full text, 1985. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/8605319.

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8

Lillibridge, Kris Hamilton. "Buoyancy-driven two-phase countercurrent flow." Thesis, Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/16027.

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9

McQuillan, K. W. "Flooding in annular two-phase flow." Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.354843.

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10

Willetts, I. P. "Non-aqueous annular two-phase flow." Thesis, University of Oxford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393120.

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11

Klidonas, G. "Void fraction in two phase flow." Thesis, University of Oxford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235032.

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12

Stewart, Colin. "Metering of two-phase slug flow." Thesis, University of Strathclyde, 2002. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21158.

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This thesis describes the development of a novel system, for metering of two-phase (gaswater) slug flows. The approach combines a model for stable slug flow, a non-intrusive set of conductance sensors, and appropriate closure relationships. This system allows each of the parameters in the model to be determined. The slug flow model is analysed, to determine the sensitivity of the phase flowrates to each measurement parameter. A metering system is then proposed which combines ring-shaped electrodes, electronic instrumentation, and processing software. The ring electrodes are optimised, for the

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13

Roberts, Paul Anthony. "Two-phase flow at T-junctions." Thesis, University of Nottingham, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240490.

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14

Teixeira, Jose Carlos Fernandes. "Turbulence in annular two phase flow." Thesis, University of Birmingham, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.570318.

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The structure of turbulent flow in vertical upwards annular air water two-phase flow was examined. Experiments were carried out in a 32 mm internal diameter tube using laser Doppler anemometry. Simultaneous measurements of the two velocity components and the Reynolds stress were obtained by the use of two colours (blue and green) of a 50 mW argon ion laser. The gas core was seeded by polystyrene particles of 1 um diameter which were believed to follow the gas turbulent fluctuations. The characteristics of the signal were used to discriminate these tracer particles from the water droplets. The

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15

Velat, Christopher James. "Experiments in cryogenic two phase flow." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0006941.

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16

MONNI, GRAZIA. "Special Instrumentation for Two-Phase Flow." Doctoral thesis, Politecnico di Torino, 2014. http://hdl.handle.net/11583/2555139.

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The design of engineering systems, involving two-phase flow, such as nuclear water reactors, requires the ability to model and predict the detailed behavior of those flows and the phenomena that they manifest, with a required degree of accuracy. In the past a significant amount of effort has been addressed to the development of intrusive and nonintrusive measurement techniques of two-phase flows, with special application to the determination of mass flow rates. Many extensive experiments are being performed to investigate in detail loss of coolant accidents (LOCA). During these experiments the

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17

Galambos, Paul C. "Two-phase dispersion in micro-channels /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/7100.

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18

Lei, Siu Long. "Phase-field simulations of two-phase flows /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?MATH%202009%20LEI.

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19

Zschuppe, Robert. "Pulse Flow Enhancement in Two-Phase Media." Thesis, University of Waterloo, 2001. http://hdl.handle.net/10012/1267.

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This laboratory project has been done to evaluate pressure pulsing as an Enhanced Oil Recovery (EOR) technique. To perform the study, a consistent laboratory methodology was developed, including the construction of a Consistent Pulsing Source (CPS). Tests compared pulsed and non-pulsed waterfloods in a paraffin or crude oil saturated medium, which also contained connate water (an irreducible water saturation). Results revealed that pulsed tests had maximum flow rates 2. 5--3 times higher, greater oil recovery rates, and final sweep efficiencies that were more than 10% greater than n

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20

Tahmasbi, Nowtarki Koroush. "Two phase hydrodynamics in cross-flow distillation." Thesis, Imperial College London, 1997. http://hdl.handle.net/10044/1/8424.

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21

Pan, Xuefeng. "Immiscible two-phase flow in a fracture." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0025/NQ47907.pdf.

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22

Olsson, Elin. "Mass Conserving Simulations of Two Phase Flow." Licentiate thesis, Stockholm, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3851.

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23

Sachdeva, Rajesh. "Two-phase flow through electric submersible pumps /." Access abstract and link to full text, 1988. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/9021070.

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24

Ekberg, Nathanial Paul. "Two-phase flow in horizontal thin annuli." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/17250.

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25

Du, Xiaoju. "Numerical Solvers for Transient Two-Phase Flow." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-23608.

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Certain numerical methods have been well developed for solving one-dimensional two-phase flow (e.g. gas and liquid) problems in the literatures during the last two decades. Based on the existing methods, the present work compares the computational efficiency, accuracy, and robustness of various numerical schemes by predicting the numerical solutions of fluid properties for a specific case to find the proper numerical method. One of the numerical schemes introduced in this work is a practical, semi-implicit upwind method used for fluid flow simulations in different flow patterns,stratified flow

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26

Brown, Ian Stuart. "The compositional consequences of two phase flow." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293611.

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27

Rahbari, Ahmadreza. "Dynamic two phase flow models for flushing." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-26320.

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This thesis aims at modeling the separated liquid-liquid flows with application for flushing. In the beginning, there will be a short review of the governing equations and the fundamental concepts used in this thesis. Two models are introduced and developed based on two previous PhD dissertations from NTNU(Trygve Wangensteen and Tor Kindsbekken Kjeldby). The properties of the fluids in these models are based on Oil, Exxsol D80, mu_o=1.79 [cP] and tapped water, mu_w=1.11 [cP]. These models will be numerically developed for both dynamic and stationary flows. The numerical scheme used for these

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28

Dai, Yunfeng. "Integration of tomographic two-phase flow measurements." Thesis, University of Leeds, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.421439.

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29

Bacon, Roger Philip. "Large bubbles in downwards two-phase flow." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388824.

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30

Yang, Xiaogang. "Two-phase flow dynamical simulations and modelling." Thesis, University of Birmingham, 1996. http://etheses.bham.ac.uk//id/eprint/1417/.

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Considerable progress in understanding and predicting two-phase flow phenomena has been advanced over the past 10 years or so using a combination of model development, computational techniques and well-designed experiments. However, there remain many modelling uncertainties mainly associated with inadequate physical prescriptions rather than with limitations of the numerical schemes. The present project addresses some of these questions, in particular in relation to dispersive transport by transient large eddies in free shear flows.

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31

Sweeney, Edmund J. "Water hammer transients in two-phase flow." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/14518.

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32

Quintana, Michael Steven. "Two phase flow splitting in piping branches." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/50127.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1998.<br>Includes bibliographical references (leaf 36).<br>The objectives of this research are to evaluate the performance of a flow-splitting tripod, discover the factors which most affect the flow distribution; and quantify the effects of geometry, quality and flow rate on the distribution. Knowing all this allows one to predict the distribution for given conditions. An R-22 test apparatus was constructed for carrying out the

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33

Martinez, Cora E. "Eulerian-Lagrangian Two Phase Debris Flow Model." FIU Digital Commons, 2009. http://digitalcommons.fiu.edu/etd/138.

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The main objective of this work is to develop a quasi three-dimensional numerical model to simulate stony debris flows, considering a continuum fluid phase, composed by water and fine sediments, and a non-continuum phase including large particles, such as pebbles and boulders. Large particles are treated in a Lagrangian frame of reference using the Discrete Element Method, the fluid phase is based on the Eulerian approach, using the Finite Element Method to solve the depth-averaged Navier–Stokes equations in two horizontal dimensions. The particle’s equations of motion are in three dimensions.

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34

Doup, Benjamin. "Experimental Investigation of Flow Structure Development in Air-water Two-phase Flows." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1332514704.

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35

Chen, Lejun. "Flow patterns in upward two-phase flow in small diameter tubes." Thesis, Brunel University, 2006. http://bura.brunel.ac.uk/handle/2438/5104.

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Two-phase flow in small tubes and channels is becoming a common phenomenon in industrial processes. However, the study of two-phase flow regimes in small tubes is still at its infancy. The previous studies are reviewed and discussed in the literature section. The problems and inconsistencies encountered in the earlier studies are presented and discussed. The experimental facility is introduced in the chapters that follow. They include a section on the design of the experimental system and the test sections, the selection of the experimental parameters and the introduction of the purposely-deve

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36

Abrishami-Savjublagh, Yoseph. "Numerical computations of dispersed flow and gravity stratified two-phase flow." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/47736.

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37

Wälchli, Severin. "Two-phase flow characteristics in gas-liquid microreactors /." Zürich, 2005. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=16116.

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38

Gustafsson, Gabriella. "Multiphase Motion Estimation in a Two Phase Flow." Thesis, Linköping University, Department of Electrical Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-5424.

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<p>To improve the control of a steel casting process ABB has developed an Electro Magnetic Brake (EMBR). This product is designed to improve steel quality, i.e. reduce non-metallic inclusions and blisters as well as risk of surface cracks. There is a demand of increasing the steel quality and in order to optimize the steel casting, simulations and experiments play an important role in achieving this. An advanced CFD simulation model has been created to carry out this task.</p><p>The validation of the simulation model is performed on a water model that has been built for this purpose. This wate

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39

Vist, Sivert. "Two-phase Flow Distribution in Heat Exchanger Manifolds." Doctoral thesis, Norwegian University of Science and Technology, Department of Energy and Process Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-199.

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<p>The current study has investigated two-phase refrigerant flow distribution in heat exchange manifolds. Experimental data have been acquired in a heat exchanger test rig specially made for measurement of mass flow rate and gas and liquid distribution in the manifolds of compact heat exchangers. Twelve different manifold designs were used in the experiments, and CO<sup>2</sup> and HFC-134a were used as refrigerants. </p>

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40

Darwich, Tarek D. A. "A statistical technique for two-phase flow metering." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/7482.

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41

Davies, Stephen Roy. "Studies of two-phase intermittent flow in pipelines." Thesis, Imperial College London, 1992. http://hdl.handle.net/10044/1/7882.

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42

Hill, David Paul. "The computer simulation of dispersed two-phase flow." Thesis, Imperial College London, 1998. http://hdl.handle.net/10044/1/8733.

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43

Matko, T. I. R. "Two-phase flow in circular secondary sedimentation tanks." Thesis, Cranfield University, 1997. http://dspace.lib.cranfield.ac.uk/handle/1826/3920.

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The main objective of this work was to optimise a numerical model to predict the flow in circular secondary sedimentation tanks. The numerical models in the literature were reviewed and the new opportunities for research were identified. Single-phase flow characteristics of two circular sedimentation tanks were investigated using the CFD program, CFX-F3D. The flow in the circular clarifiers were modelled in two dimensions (axial and radial) and using the standard k-E turbulence model. Results indicated that a vertical inlet instead of a horizontal inlet did not improve the correlation with the

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44

Lundberg, Matthew James. "Two-phase reactive flow within variable aperture fractures." Diss., Connect to online resource, 2005. http://wwwlib.umi.com/cr/colorado/fullcit?p1427766.

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45

Sarica, Cem. "Two-phase flow in low velocity terrain pipelines /." Access abstract and link to full text, 1990. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/9030838.

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46

Zheng, Guohua. "Two-phase slug flow in hilly terrain pipelines /." Access abstract and link to full text, 1991. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/9201599.

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47

Nygaard, Thor Isak. "Two phase swirling flow in a cylindrical reactor." Thesis, Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/10192.

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48

Wartell, Jason David. "Moisture fraction measurement for two-phase mist flow." Thesis, Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/16876.

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49

Al-Gharbi, Mohammed Saif Hilal. "Dynamic pore-scale modelling of two-phase flow." Thesis, Imperial College London, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409745.

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50

Carabateas, Nicolas. "Two phase flow and combustion in S.I. engines." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265853.

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