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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

Design, construction and commissioning of a two-phase (air-water) flow regime transition test rig.

Lamari, Mohamed Limayem, January 1900 (has links)
Thesis (M. Eng.)--Carleton University, 1991. / Includes bibliographical references. Also available in electronic format on the Internet.

Optimizing of flow parameters for the expansion of very low-quality steam

Neusen, Kenneth Fred. January 1962 (has links)
Thesis (M.S.)--University of California, Berkeley, 1962. / "Engineering and Equipment, UC-38" -t.p. "TID-4500 (17th Ed.)" -t.p. Includes bibliographical references (p. 44).

Two-phase flow: buoyancy driven flow of a partially miscible droplet at low Reynolds number a thesis presented to the faculty of the Graduate School, Tennessee Technological University /

Gottapu, Manohar, January 2009 (has links)
Thesis (M.S.)--Tennessee Technological University, 2009. / Title from title page screen (viewed on July 16, 2010). Bibliography: leaves 135-143.

Discontinuous Galerkin finite element methods applied to two-phase, air-water flow problems

Eslinger, Owen John, Wheeler, Mary F. January 2005 (has links) (PDF)
Thesis (Ph. D.)--University of Texas at Austin, 2005. / Supervisor: Mary F. Wheeler. Vita. Includes bibliographical references.

Estudo experimental de escoamentos líquido-gás intermitentes em tubulações inclinadas / Experimental analysis of slug flow in inclined lines

Gómez Bueno, Luis Gerardo 16 August 2018 (has links)
Orientador: Eugênio Spanó Rosa / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica / Made available in DSpace on 2018-08-16T06:14:18Z (GMT). No. of bitstreams: 1 GomezBueno_LuisGerardo_M.pdf: 4585840 bytes, checksum: b8ed6708894a46ed052d422f40624935 (MD5) Previous issue date: 2010 / Resumo: Medidas experimentais foram realizadas em uma tubulação de 26 mm de diâmetro interno, com inclinação variável de horizontal a vertical, operando com escoamento de água e ar no padrão intermitente ou "slug". Foram utilizados dois sensores de impedância posicionados 77D e 257D a jusante do misturador de água e ar. As faixas de velocidades superficiais de gás e líquido foram 0,1 m/s a 2,1 m/s e 0,3 m/s a 1,2 m/s, respectivamente. Os ângulos de inclinação da tubulação variaram de 15 em 15 graus desde a horizontal até a vertical. Por meio dos sensores de impedância e de pressão foram determinados os parâmetros: a velocidade do nariz da bolha de ar, o comprimento da bolha e do pistão líquido, a freqüência, o fator de intermitência, a taxa de coalescência e a queda de pressão. Uma análise do comportamento destes parâmetros em função das vazões de água e ar assim como dos ângulos de inclinação é realizada / Abstract: This work analyses experimentally the flow properties of a gas-liquid mixture flowing in the slug regime in inclined lines. The experimental data are collected through a pair of impedance probes placed at 77D and 257D downstream of the air-water mixer in a 26mm ID pipe. During the tests air and water superficial velocities spanned, respectively, from 0,1 m/s to 2,1 m/s and from 0,3 m/s to 1,2 m/s. The tests started with the line positioned at the horizontal, 0 degrees and changed, in steps of 15 degrees each, up to the vertical position or 90 degrees. Along each line position the pressure drop, the bubble velocity, the lengths of the liquid slug and of the elongated bubble, the coalescence rate as well as the frequency of the air-water structures were measured. This work analyses the effect of the line inclination on the slug flow properties / Mestrado / Termica e Fluidos / Mestre em Engenharia Mecânica

Dynamics of a single flexible cylinder in external axial compressible fluid flow

Ostoja-Starzewski, Martin January 1980 (has links)
No description available.

Electrophoresis of solutes in aqueous two-phase systems.

Levine, Mark Louis. January 1992 (has links)
Electrophoresis of solutes was studied in aqueous two-phase systems, concentrating on the special behavior in the interfacial region. Moving boundary electrophoresis was examined in a free fluid U-tube apparatus. Zone electrophoresis was investigated in two-phase systems which were gelled by the addition of acrylamide, which was subsequently polymerized. The size and nature (concentration or dilution) of polarizations which were found to occur was found to depend on the magnitude of the equilibrium partition coefficient of the solute in the two-phase system, as well as the direction of migration across the interface. These polarizations are in addition to those commonly known to occur near regions where electrophoretic flux changes radically, such as near interfaces. They can be a direct result of the requirement for equilibrium across the interface, as demonstrated by our experiments. Models were constructed to numerically simulate this behavior, which accounted for unsteady state electrophoresis and diffusion of multiple proteins or other amphoteric solutes. Two cases were explored, one requiring instantaneous solute equilibration across the interface, the other allowing for a resistance to mass transfer here. All models demonstrated a characteristic noted in experimental studies, concentration at interfaces when electrophoresis is from equilibrium preferred phase towards non-preferred phase. Furthermore, the equilibrium model correctly predicted the complex relationship between partition coefficient, direction of migration, and moving boundary or zone electrophoresis, which causes differences in the polarizations observed in these various systems. The simulation could also quantitatively estimate the width of the polarized region to within an order of magnitude, in comparison with experimental results, while hampered by a lack of mobility data for solutes in solutions containing polymers.

The effect of suspended sediment concentration on the mixing of neutrally buoyant aqueous phase tracers in open channel flows

Shaw, Duncan Andrew January 2000 (has links)
No description available.

Stratified flow at T-junctions

Rea, Suzanne January 1999 (has links)
No description available.

Two-phase flow in straight pipe and 90° bends

Bruce, James Masson January 1971 (has links)
A method of measuring the moan liquid velocity in an airwater two-phase flow has been successfully developed utilising an electrolyte tracer technique. Liquid holdup is derived from this velocity measurement and compared with existing correlation. Two new liquid holdup correlations are developed, one empirical the other theoretical. These are compared with the correlations and data of others over a wide range of experimental conditions with encouraging results Pressure drop has been measured for straight pipe and for six 90 degree bends, of relative radius, R/d = 1 to 6 inclusive, The straight pipe data is in agreement with the results of others, A theoretical analysis of straight pipe pressure drop is attempted and good agreement let demonstrated with the Lockhart-Martinelli correlation The data for the tends indicate that the Lockhart-Martinelli correlation will predict the predict the Pressure drop With acceptable accuracy. The applicability of a homogeneous model with a constant bend resistance coefficient is demonstrated. The total momentum flux has been measured at the pipe exit and a liquid entrainment factor is postulated in order to satisfy momentum and continuity constraints for a two-velocity flow model. Entrainment correlations are developed for slug flows and an existing correlation for annular flow is found satisfactory with modification.

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