Log in

Relevant bibliographies by topics / Air-water flows / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Air-water flows.

Dissertations / Theses on the topic 'Air-water flows'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Air-water flows.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Shaban, Hassan. "Experimental Investigations of Internal Air-water Flows." Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/32952.

Full text

Abstract:

The objective of the present thesis research is to apply state-of-the-art experimental and data analysis techniques to the study of gas-liquid pipe flows, with a focus on conditions occurring in header-feeder systems of nuclear reactors under different accident scenarios. Novel experimental techniques have been proposed for the identification of the flow regime and measurement of the flow rates of both phases in gas-liquid flows. These techniques were automated, non-intrusive and economical, which ensured that their use would be feasible in industrial as well as laboratory settings. Measuremen

APA, Harvard, Vancouver, ISO, and other styles

2

Gargallo, Gallego Mireia. "Countercurrent flow limitations in horizontal stratified flows of air and water." Karlsruhe : FZKA, 2004. http://bibliothek.fzk.de/zb/berichte/FZKA7018.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Kuang, Xingxing, and 匡星星. "Air and water flows induced by water level change in aquifers." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/196080.

Full text

Abstract:

The study of air and water flows induced by water level changes is important for a better understanding of water release in response to pumping in unconfined aquifers and give new insights into pumping test data analysis. To improve the unsaturated flow and air-water two-phase flow numerical modeling of unconfined aquifer pumping tests, an improved unsaturated hydraulic conductivity model and a new relative air permeability model were proposed. A synthesis of the literature on subsurface airflow induced by natural forcings was presented to provide a better understanding of the generated airflo

APA, Harvard, Vancouver, ISO, and other styles

4

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.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Liu, Ting. "Modelling air―water flows in bottom outlets of dams." Doctoral thesis, KTH, Vattendragsteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-141182.

Full text

Abstract:

If air is entrained in a bottom outlet of a dam in an uncontrolled way, the resulting air pockets may cause problems such as blowback, blowout and loss of discharge capacity. In order to provide guidance for bottom outlet design and operation, this study examines how governing parameters affect air entrainment, air-pocket transport and de-aeration and the surrounding flow structure in pipe flows. Both experimental and numerical approaches are used. Air can be entrained into the bottom outlet conduit due to vortex formation at the intake if the intake submergence is not sufficient. The influent

APA, Harvard, Vancouver, ISO, and other styles

6

AhÌ£madiÌ„, AhÌ£mad. "Studies of air and water flows in siphon spillways." Thesis, Imperial College London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289856.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Malayeri, Mohammad Reza. "Validation of the use of air/water in simulating bubbly steam/water flows." Thesis, University of Surrey, 2000. http://epubs.surrey.ac.uk/903/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Lessard, Etienne. "Measurements in Horizontal Air-water Pipe Flows Using Wire-mesh Sensors." Thèse, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/30837.

Full text

Abstract:

This thesis is concerned with the performance and measurement uncertainty of wire-mesh sensors in different air-water flow regimes in horizontal pipes. It also presents measurements of void fraction and interfacial velocity in such flows. It was found that the interfacial velocity measurements of the wire-mesh sensors were in good agreement with those taken with a high-speed camera and estimates of the uncertainties of these measurements are presented. Drift-flux models were fitted to the measurements and it was found that the parameters of these models were not only sensitive to the flow regi

APA, Harvard, Vancouver, ISO, and other styles

9

Studley, Allison F. "Numerical Modeling of Air-Water Flows in Bubble Columns and Airlift Reactors." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/36380.

Full text

Abstract:

Bubble columns and airlift reactors were modeled numerically to better understand the hydrodynamics and analyze the mixing characteristics for each configuration. An Eulerian-Eulerian approach was used to model air as the dispersed phase within a continuous phase of water using the commercial software FLUENT. The Schiller-Naumann drag model was employed along with virtual mass and the standard k-e turbulence model. The equations were discretized using the QUICK scheme and solved with the SIMPLE coupling algorithm. The flow regimes of a bubble column were investigated by varying the column diam

APA, Harvard, Vancouver, ISO, and other styles

10

Teng, Penghua. "CFD MODELLING OF TWO-PHASE FLOWS AT SPILLWAY AERATORS." Licentiate thesis, KTH, Vattendragsteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202392.

Full text

Abstract:

Due to the high-speed flow in a chute spillway, cavitation damages often occur. This undesired phenomenon threatens the safety of the structure. For the purpose of eliminating the damages, an aerator is often installed in the spillway. To understand its characteristics, physical model tests are a popular method. To complement the model tests, computation fluid dynamics (CFD) simulations are used to study aerator flows. To represent the two-phase flows, multiphase models should be employed. This thesis examines two of them, namely, the Volume-Of-Fluid model (VOF) and Two-Fluid model. Based on t

APA, Harvard, Vancouver, ISO, and other styles

11

Bayón, Barrachina Arnau. "Numerical analysis of air-water flows in hydraulic structures using computational fluid dynamics (CFD)." Doctoral thesis, Universitat Politècnica de València, 2018. http://hdl.handle.net/10251/90440.

Full text

Abstract:

The new legal regulations derived from climate change dictate that hydraulic structures must be designed to handle flood events associated with return periods up to 10,000 years. This obviously involves adapting the existing infrastructure to meet such requirements. In order to avoid risks in the restitution of the flow discharged to rivers, such as bank overflows or streambed erosion and scour processes, hydraulic design must be supported by reliable tools capable of reproducing the behavior of hydraulic structures. In the work presented herein, a fully three-dimensional CFD model to reproduc

APA, Harvard, Vancouver, ISO, and other styles

12

Hasan, Belkiz, and Paulo Monsalve. "Study on free-surface aeration with high-velocity air-water flows in open-channels." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-216145.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Gargallo, Gallego Mireia [Verfasser]. "Countercurrent flow limitations in horizontal stratified flows of air and water / Forschungszentrum Karlsruhe GmbH, Karlsruhe. Mireia Gargallo Gallego." Karlsruhe : FZKA, 2004. http://d-nb.info/973573414/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Farrar, B. "Hot-film anemometry in dispersed oil-water flows : Development of a hot-film anemometer based measurement technique for detailed studies of complex two-phase flows and its application.........bubbly water-kerosene and water-air flows." Thesis, University of Bradford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234685.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Gottmann, Matthias 1964. "Local wall shear stress and interface behavior of adiabatic air-water flows in rectangular ducts." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/282445.

Full text

Abstract:

An experiment was designed and built to study vertical annular air-water flows in a channel with a rectangular cross section with no heat transfer. Flush-wire electrical conductivity probes were theoretically analyzed to demonstrate their potential to accurately measure liquid film thickness in the experiment with high temporal and spatial resolution. Flush-wire probes were then successfully implemented and film thickness measurements obtained. From theoretical analysis, the suitability of micromachined hot film and floating element wall shear stress sensors for measurements of wall shear stre

APA, Harvard, Vancouver, ISO, and other styles

16

Lo, S. M. "Development of a new inter-phase friction law for air-water flows in inclined pipes." Thesis, Imperial College London, 1985. http://hdl.handle.net/10044/1/37767.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Mansour, Michael Khairat Botros Verfasser], and Dominique [Gutachter] [Thévenin. "Transport of two-phase air-water flows in radial centrifugal pumps / Michael Khairat Botros Mansour ; Gutachter: Dominique Thévenin." Magdeburg : Universitätsbibliothek Otto-von-Guericke-Universität, 2020. http://d-nb.info/1219937614/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Mansour, Michael [Verfasser], and Dominique [Gutachter] Thévenin. "Transport of two-phase air-water flows in radial centrifugal pumps / Michael Khairat Botros Mansour ; Gutachter: Dominique Thévenin." Magdeburg : Universitätsbibliothek Otto-von-Guericke-Universität, 2020. http://d-nb.info/1219937614/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Koleski, Goce. "Flower-like azimuthal instability of a divergent flow at the water/air interface." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0244.

Full text

Abstract:

Un écoulement axisymétrique à une interface eau-air s’avère instable azimutalement. Durant cette thèse,nous avons mené deux expériences afin d’étudier ce point : (1) une petite fontaine subaquatique propulse un jet contre l’interface eau-air créant ainsi en surface un écoulement centrifuge radial; (2) une microbille chauffée par laser, en mouillage partiel à la surface de l’eau, engendre un écoulement thermocapillaire divergent. Lorsque la vitesse du jet ou la puissance du laser est suffisamment forte, il se produit une brisure de symétrie de l’écoulement torique initial en paires de vortex co

APA, Harvard, Vancouver, ISO, and other styles

20

Niehus, Mark T. "An Experimental Study of Temperature Sensor Noise Analysis in Evaluating the Velocity of Single-Phase Air and Water Flows." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1213385038.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Zhou, Xinquan. "Measurement and Modeling of the Liquid-phase Turbulence in Adiabatic Air-water Two-phase Flows with a Wide Range of Void Fractions." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406210359.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Liao, Y., and D. Lucas. "Entwicklung und Validierung von Modellen für Blasenkoaleszenz und -zerfall." Forschungszentrum Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-113883.

Full text

Abstract:

Ein neues, verallgemeinertes Modell für Blasenkoaleszenz und –zerfall wurde entwickelt. Es basiert auf physikalischen Überlegungen und berücksichtigt verschiedene Mechanismen, die zu Blasenkoaleszenz und –zerfall führen können. In einer ausführlichen Literaturrecherche wurden zunächst die verfügbaren Modelle zusammengestellt und analysiert. Es zeigte sich, dass viele widersprüchliche Modelle veröffentlicht wurden. Keins dieser Modelle erlaubt die Vorhersage der Entwicklung der Blasengrößenverteilungen entlang einer Rohrströmung für einen breiten Bereich an Kombinationen von Volumenströmen der

APA, Harvard, Vancouver, ISO, and other styles

23

Fonty, Thomas. "Modélisation de l’entraînement d’air dans l'eau avec la méthode SPH." Thesis, Paris Est, 2019. http://www.theses.fr/2019PESC1013.

Full text

Abstract:

Les écoulements au sein d'ouvrages hydrauliques – déversement au-dessus d'un barrage, déferlement d'une vague sur une digue, etc. – sont le siège de forts mélanges d'eau et d'air qui se traduisent visuellement par la formation d'eaux blanches à la dynamique complexe. Représenter fidèlement le phénomène d'entraînement/capture des bulles d'air dans l'eau revêt donc un aspect stratégique important pour le dimensionnement de ces ouvrages. La modélisation tant physique que numérique de tels cas s'avère délicate à cause du fort rapport de densité entre les phases et de la nature multi-échelle de ces

APA, Harvard, Vancouver, ISO, and other styles

24

Gai, Guodong. "Modeling of water sprays effects on premixed hydrogen-air explosion, turbulence and shock waves Modeling pressure loads during a premixed hydrogen combustion in the presence of water spray Numerical study on laminar flame velocity of hydrogen-air combustion under water spray effects Modeling of particle cloud dispersion in compressible gas flows with shock waves A new formulation of a spray dispersion model for particle/droplet-laden flows subjected to shock waves Particles-induced turbulence: a critical review of physical concepts, numerical modelings and experimental investigation A new methodology for modeling turbulence induced 1 by a particle-laden flow using a mechanistic model." Thesis, Normandie, 2020. http://www.theses.fr/2020NORMIR14.

Full text

Abstract:

Cette thèse de doctorat est dédiée au développement de modèles physiques pour l’étude des systèmes d’aspersion de gouttelettes d’eau en milieu réactif d’hydrogène-air pré-mélangée dans les centrales nucléaires. Des modèles d’ordre réduit sont développés pour décrire l’évaporation des gouttelettes d’eau dans la flamme, la dispersion des nuages de particules après le passage des ondes de choc et l’évolution de l’échelle caractéristiques de turbulence avec la présence d’un jet d’eau. Une nouvelle méthodologie est proposée pour évaluer les effets de l’évaporation par l’aspersion sur la propagation

APA, Harvard, Vancouver, ISO, and other styles

25

Grundy, Ian H. "Air flow near a water surface /." Title page, table of contents and summary only, 1986. http://web4.library.adelaide.edu.au/theses/09PH/09phg889.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Ruedel, Uwe Wolfgang. "Flow visualisation of impinging air and water jets." Thesis, Nottingham Trent University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393507.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Zhou, Jing. "Flow Patterns in Vertical Air/Water Flow With and Without Surfactant." University of Dayton / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1375455656.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Akor, Innocent Collins. "Liquid Holdup in Vertical Air/Water Multiphase Flow with Surfactant." University of Dayton / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1382076807.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Bezdegumeli, Ugur. "Investigation Of Air Bubble Motion In Counter-current Water Flow Conditions." Phd thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1104413/index.pdf.

Full text

Abstract:

In this thesis study, air bubble motion in counter-current water flow conditions in a vertical pipe is investigated experimentally. For this purpose, a test set-up was designed and constructed. Images of motions of single bubbles, having different diameters in the range of 3.0-4.8 mm, generated by specially designed bubble injectors were recorded by using a monochrome camera, an image capture card and a PC. Recorded video images were processed to obtain the necessary data for the The purpose of the study is to determine variation as a function of the equivalent bubble diameter, water flow velo

APA, Harvard, Vancouver, ISO, and other styles

30

Pradhan, Suman. "Measurement of bubble velocity vectors in bubbly air water multiphase flow." Thesis, University of Huddersfield, 2010. http://eprints.hud.ac.uk/id/eprint/9247/.

Full text

Abstract:

Measurement of the volumetric flow rate of each of the flowing components in multiphase flow is often required and this is particularly true in Production Logging applications. Thus, an increasing level of interest has been shown in making flow rate measurements in multiphase flow. A new generation of tomographic instrument, which enables measurement of the instantaneous local velocity vector and the instantaneous local volume fraction of the dispersed phase, is now being introduced. However validation and calibration of such instruments is necessary. This thesis describes the development of a

APA, Harvard, Vancouver, ISO, and other styles

31

Beyer, M., D. Lucas, J. Kussin, and P. Schütz. "Air-water experiments in a vertical DN200-pipe." Forschungszentrum Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-74486.

Full text

Abstract:

The extensive experimental results presented in this report provide a high-quality database for air-/water flows in a vertical pipe with a nominal diameter of 200 mm. This database can be used for the development and validation of CFD-like models for two-phase flows, e.g. for bubble coalescence and fragmentation. In particular, the investigations aim on the evolution of the two-phase flow along the pipe height. Therefore, up to 18 single measurements with varying distances between the gas injection and measurement plane were realised for each of the 92 combinations of gas and water flow rates.

APA, Harvard, Vancouver, ISO, and other styles

32

Beyer, M., D. Lucas, J. Kussin, and P. Schütz. "Air-water experiments in a vertical DN200-pipe." Forschungszentrum Dresden-Rossendorf, 2008. https://hzdr.qucosa.de/id/qucosa%3A22143.

Full text

Abstract:

The extensive experimental results presented in this report provide a high-quality database for air-/water flows in a vertical pipe with a nominal diameter of 200 mm. This database can be used for the development and validation of CFD-like models for two-phase flows, e.g. for bubble coalescence and fragmentation. In particular, the investigations aim on the evolution of the two-phase flow along the pipe height. Therefore, up to 18 single measurements with varying distances between the gas injection and measurement plane were realised for each of the 92 combinations of gas and water flow rates.

APA, Harvard, Vancouver, ISO, and other styles

33

Herlina. "Gas transfer at the air-water interface in a turbulent flow environment." Karlsruhe : Univ.-Verl, 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=976595842.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Tsai, Yuan-Shiang. "The interaction of gravity-capillary water waves with a laminar air flow." Thesis, University College London (University of London), 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270486.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Toombes, Luke. "Experimental study of air-water flow properties on low-gradient stepped cascades /." St. Lucia, Qld, 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16746.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Liu, Song S. M. Massachusetts Institute of Technology. "Numerical Investigation of turbulent coupling boundary layer of air-water interaction flow." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/44612.

Full text

Abstract:

Thesis (S.M. in Mechanical Engineering and S.M. in Ocean Engineering)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005.<br>Includes bibliographical references (p. 159-164).<br>Air-water interaction flow between two parallel flat plates, known as Couette flow, is simulated by direct numerical simulation. The two flowing fluids are coupled through continuity of velocity and shear stress condition across the interface. Pseudo-spectral method is used in each flow subdomain with Fourier expansion in streamwise and spanwise directions and finite difference in vertical di

APA, Harvard, Vancouver, ISO, and other styles

37

King, Matthew James Stuart. "Experimental and modelling studies of transient slug flow." Thesis, Imperial College London, 1998. http://hdl.handle.net/10044/1/8270.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Coronado, Hernández Óscar Enrique. "Transient phenomena during the emptying process of water in pressurized pipelines." Doctoral thesis, Universitat Politècnica de València, 2020. http://hdl.handle.net/10251/120024.

Full text

Abstract:

[ES] El análisis de los fenómenos transitorios durante las operaciones de llenado en conducciones de agua ha sido estudiado de manera detallada comparado con las maniobras de vaciado. En este último se encontró que no existen modelos matemáticos capaces de predecir el fenómeno. Esta investigación inicia estudiando el fenómeno transitorio generado durante el vaciado en una tubería simple, como paso previo para entender el comportamiento de las variables hidráulicas y termodinámicas durante el vaciado de agua en conducciones presurizadas de perfil irregular. Los análisis son realizados considera

APA, Harvard, Vancouver, ISO, and other styles

39

Ip, Kenneth C. W. "Dynamic modular simulation of variable water and air volume flow systems in buildings." Thesis, University of Bristol, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251526.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Belden, Jesse (Jesse Levi). "Quantitative imaging of the air-water flow fields formed by unsteady breaking waves." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/47893.

Full text

Abstract:

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2009.<br>Includes bibliographical references (p. 97-101).<br>An experimental method for simultaneously measuring the velocity fields on the air and water side of unsteady breaking waves is presented. The method is applied to breaking waves to investigate the physics of the air and water flow fields to further our knowledge of the impact of wave breaking on air-sea interaction. The method includes a novel technique for seeding the air flow such that the air velocity can be resolved in the absence of wind. Low

APA, Harvard, Vancouver, ISO, and other styles

41

Uys, Ehbenezer Chris. "Entrainment in an air/water system inside a sieve tray column." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4237.

Full text

Abstract:

Thesis (MScEng (Process Engineering))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: Mass transfer efficiency in distillation, absorption and stripping depends on both thermodynamic efficiency and hydrodynamic behaviour. Thermodynamic efficiency is dependent on the system kinetics while hydrodynamics is the study of fluid flow behaviour. The focus of this thesis is the hydrodynamic behaviour in tray columns, which affects entrainment. In order to isolate hydrodynamic behaviour from the thermodynamic behaviour that occurs inside sieve tray columns, investigations are conducted und

APA, Harvard, Vancouver, ISO, and other styles

42

[Verfasser], Herlina. "Gas transfer at the air-water interface in a turbulent flow environment / von Herlina." Karlsruhe : Univ.-Verl. Karlsruhe, 2005. http://d-nb.info/976595842/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

McDonald, Angus Kai. "Experimental investigation of small-scale breaking waves : flow visualization across the air-water interface." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33572.

Full text

Abstract:

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 2005.<br>Includes bibliographical references (p. 137-140).<br>The dynamics of breaking waves significantly affect air-sea fluxes of heat, momentum, mass and energy across the ocean interface. Breaking waves also contribute considerable loading to offshore and coastal structures, and furthermore, the quasi-steady bow wave on a ship increases drag and ease of detection by the bubbly wake. However, the complexity of the phenomenon has severely limited our ability to describe it and predict its occurrence. Research h

APA, Harvard, Vancouver, ISO, and other styles

44

Law, Deify. "Computational Modeling and Simulations of Hydrodynamics for Air-Water External Loop Airlift Reactors." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/27991.

Full text

Abstract:

External loop airlift reactors are widely used for biochemical applications such as syngas fermentation and wastewater treatment. To further understand the inherent gas-liquid flow physics within the reactors, computational modeling and simulations of hydrodynamics for air-water external loop airlift reactors were investigated. The gas-liquid flow dynamics in a bubble column were simulated using a FORTRAN code developed by Los Alamos National Laboratory, CFDLib, which employs an Eulerian-Eulerian ensemble averaged method. A two-dimensional Cartesian coordinate system was used to conduct an ex

APA, Harvard, Vancouver, ISO, and other styles

45

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

46

Abbasalizadeh, Rajbari Majid. "Investigation of three-phase nozzle flow (water-sand-air) in an innovative sand-blasting system." Thesis, Anglia Ruskin University, 2011. http://arro.anglia.ac.uk/702999/.

Full text

Abstract:

The study presented herewith was mainly focused on the numerical analysis of air-sand-water three-phase turbulent flow through converging-diverging nozzle. For this purpose dispersed flow of air-sand-water by various air inlet pressures, ambient air inlet temperature, sand particles and water droplets by different mass flow rates and temperature were considered. This study puts emphasis on sand blasting nozzle which is employed in Farrow abrasive system. Two-way turbulence coupling between particles/droplets and air flow as well as interference between the incident stream of particles and rebo

APA, Harvard, Vancouver, ISO, and other styles

47

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.

Full text

Abstract:

<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

APA, Harvard, Vancouver, ISO, and other styles

48

Schima, Susan Anastasia 1969. "Monitoring air flow and water movement in the subsurface with cross-borehole resistivity and induced polarization." Thesis, The University of Arizona, 1994. http://hdl.handle.net/10150/192085.

Full text

Abstract:

The research included in this thesis consists of the following two geophysical surveys: a cross-borehole resistivity and induced polarization tomography survey to track the flow of water in the unsaturated zone at Avra Valley, Arizona; and a cross-borehole resistivity tomography survey to monitor air flow resulting from air sparging in the saturated zone in Florence, Oregon. In Avra Valley, the resistivity decreases from background values in the areas saturated by the injected water, while the IP in these saturated areas increases, indicating that salts may have been flushed out by the descend

APA, Harvard, Vancouver, ISO, and other styles

49

Koo, Bon Guk. "Numerical study of two-phase air-water interfacial flow: plunging wave breaking and vortex-interface interaction." Diss., University of Iowa, 2011. https://ir.uiowa.edu/etd/2731.

Full text

Abstract:

Two different air-water interfacial flows are studied including plunging wave breaking and flow past a vertical surface-piercing circular cylinder using complementary CFDShip-Iowa version 6 including Cartesian grid solver and orthogonal curvilinear grid solver. The plunging wave-breaking process for impulsive flow over a bump in a shallow water flume has been simulated using the exact experimental initial and boundary conditions. The overall plunging wave breaking process is described with major wave breaking events identified: jet plunge, oblique splash and vertical jet. These major events re

APA, Harvard, Vancouver, ISO, and other styles

50

Boháček, Jan. "EFFECT OF FLOW PARAMETERS OF WATER AND AIR ATOMIZED SPRAYS ON COOLING INTENSITY OF HOT SURFACES." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-233959.

Full text

Abstract:

Práce komplexně popisuje vodní a vodovzdušné chlazení pomocí metod CFD (Computational Fluid Dynamics) konkrétně s využitím software ANSYS FLUENT. Skládá se ze dvou hlavních částí, z nichž první se zabývá numerickým popisem jediné vodní kapky a druhá popisem směsí kapek představující paprsek válcové a ploché trysky. Je založena převážně na vícefázových modelech proudění a vlastních uživatelsky definovaných funkcí (User Defined Functions, UDF) představujících stěžejní část práce. Uvedené výpočtové modely jsou ve většině případů verifikovány pomocí experimentálních dat nebo jiných numerických mod

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!