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AbstractAbstract
[en] This report describes a void-quality relationship for horizontal stratified two-phase flow. The present predictions compare reasonably well with the experiments and are an improvement over the Armand and Martinelli correlations
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Source
Jul 1979; 14 p
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Report
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Buchmann, J.H.; Qassim, R.Y.
Rio de Janeiro Univ. (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia1981
Rio de Janeiro Univ. (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia1981
AbstractAbstract
[en] The radial distribution of fluid pressure on a stationary disk coaxial with a rotating disk is determined experimentally for various inter-disc spacings. The results show that similarity flows are only possible for both small and large values of this distance. In the former case, the flow faraway from the stationary disk appears to be that suggested by Batchelor, while in the latter case, the flow turns out to be in accordance with the assumption of Stewartson. (Author)
[pt]
A distribuicao radial da pressao no fluido em um disco estacionario coaxial com um disco rotacional e determinada experimentalmente para varios espacamentos entre - discos. Os resultados mostram que escoamentos com similaridade sao somente possiveis para valores pequenos e grandes destas distancias. No primeiro caso o escoamento alem do disco estacionario parece ser aquele sugerido por Batchelor, enquanto no ultimo caso, o escoamento torna-se de acordo com a hipotese de Stewartson. (E.G.)Primary Subject
Source
Jul 1981; 10 p
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Report
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Rivard, W.C.; Torrey, M.D.
Los Alamos Scientific Lab., N.Mex. (USA)1978
Los Alamos Scientific Lab., N.Mex. (USA)1978
AbstractAbstract
[en] Recommended corrections are described for the computer code K-FIX, which has been published in the report LA-NUREG-6623 and released to the Argonne Code Center in April 1977. The corrections given are current through January 1, 1978
Primary Subject
Source
Mar 1978; 6 p; Available from NTIS., PC A02/MF A01
Record Type
Report
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Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Sonneck, G.; Steiner, R.; Witt, A.; Dworzak, F.; Innerhofer, H.; Scherzer, H.; Grasegger, S.
1985 Annual convention of the Austrian Physical Society1985
1985 Annual convention of the Austrian Physical Society1985
AbstractAbstract
No abstract available
Original Title
Beitraege zur Fluessigkeits- und Fluessigkeits-Gas-Messung
Source
Oesterreichische Physikalische Gesellschaft, Vienna; 112 p; Oct 1985; p. 59; 1985 Annual convention of the Austrian Physical Society; Vienna (Austria); 23-27 Sep 1985; Published in summary form only.
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Miscellaneous
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AbstractAbstract
[en] In this paper, TASCflow3D is used to solve inner and outer 3D viscous incompressible turbulent flow (Re = 5.6 x 106) around axisymmetric body with duct. Governing equation is RANS equation with standard k - ε turbulence model. The discrete method used is the finite volume method based on the finite element approach describing the geometry, which retains much of geometrical flexibility as well as the important conservative properties. The Multiblock and Algebraic Multigrid techniques are used for the convergence acceleration. The agreement between experiment and calculation is fairly good, it indicates this novel approach can simulate the complex flow such as flow interaction between rotor and stator or propulsion systems containing tip clearance flow and cavitation. (author)
Primary Subject
Source
Khalid, M.; Chen, S.; McIlwain, S. (National Research Council Canada, Inst. for Aerospace Research, Ottawa, Ontario (Canada)) (eds.); CFD Society of Canada, Ottawa, Ontario (Canada); 151 Megabytes; 2005; p. 53-65; CFD 2005: 12. Annual conference of the Computational Fluid Dynamics Society of Canada; St. John's, Newfoundland (Canada); 31 Jul - 3 Aug 2005; Available from CFD Society of Canada, Ottawa, Ontario (Canada); 3 refs., 2 tabs., 17 figs.
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Miscellaneous
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Krepper, Eckhard; Beyer, Matthias; Frank, Thomas; Lucas, Dirk; Prasser, Horst-Michael, E-mail: E.Krepper@fzd.de, E-mail: Thomas.Frank@ansys.com, E-mail: D.Lucas@fzd.de, E-mail: hprasser@ethz.ch2009
AbstractAbstract
[en] A population balance model (the Inhomogeneous MUSIG model) has recently been developed in close cooperation between ANSYS-CFX and Forschungszentrum Dresden-Rossendorf and implemented into the CFD-Code CFX [Krepper, E., Lucas, D., Prasser, H.-M, 2005. On the modelling of bubbly flow in vertical pipes. Nucl. Eng. Des. 235, 597-611; Frank, T., Zwart, P.J., Shi, J.-M., Krepper, E., Rohde, U., 2005. Inhomogeneous MUSIG Model-a population balance approach for polydispersed bubbly flows, International Conference 'Nuclear Energy for New Europe 2005', Bled, Slovenia, September 5-8, 2005; Krepper, E., Beyer, M., Frank, Th., Lucas, D., Prasser, H.-M., 2007. Application of a population balance approach for polydispersed bubbly flows, 6th Int. Conf. on Multiphase Flow Leipzig 2007, (paper 378)]. The current paper presents a brief description of the model principles. The capabilities of this model are discussed via the example of a bubbly flow around a half-moon shaped obstacle arranged in a 200 mm pipe. In applying the Inhomogeneous MUSIG approach, a deeper understanding of the flow structures is possible and the model allows effects of polydispersion to be investigated. For the complex flow around the obstacle, the general structure of the flow was well reproduced in the simulations. This test case demonstrates the complicated interplay between size dependent bubble migration and the effects of bubble coalescence and breakup on real flows. The closure models that characterize the bubble forces responsible for the simulation of bubble migration show agreement with the experimental observations. However, clear deviations occur for bubble coalescence and fragmentation. The models applied here, which describe bubble fragmentation and coalescence could be proved as a weakness in the validity of numerous CFD analyses of vertical upward two-phase pipe flow. Further work on this topic is under way.
Primary Subject
Source
S0029-5493(09)00307-0; Available from http://dx.doi.org/10.1016/j.nucengdes.2009.06.015; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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AbstractAbstract
[en] The present work addresses a numerical study on impulsive sound attenuation for a complex high-pressure blast flow field; these characteristics are generated by a supersonic propellant gas flow through a shock tube into an ambient environment. A numerical solver for analyzing the high pressure blast flow field is developed in this study. From numerical simulations, wave dynamic processes (which include a first precursor shock wave, a second main propellant shock wave, and interactions in the muzzle blasts) are simulated and discussed. The pressure variation of the blast flow field is analyzed to evaluate the effect of a silencer. A live firing test is also performed to evaluate four different silencers. The results of this study will be helpful in understanding blast wave and in designing silencers
Primary Subject
Source
8 refs, 18 figs, 1 tab
Record Type
Journal Article
Journal
Journal of Mechanical Science and Technology; ISSN 1738-494X;
; v. 22(1); p. 190-200

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AbstractAbstract
[en] In the liquid fuel combustion chamber, employed fuel must be atomized before being injected into the combustion zone. Therefore, the complete fuel atomization is the most important condition for the combustion efficiency. The atomization quality strongly affects the combustion performance, exhaust pollutant emissions, and flame stability. Therefore, the whole process of spray atomization is of fundamental significance. During past decades many experimental and theoretical studies in this field have been carried out and some improved results have been obtained. Two-phase atomizers, having a variety of advantages such as spray uniformity, appreciable atomization, and smaller SMD with an increase of ambient gas, are considered to be applied in various industrial processes. The purpose of present study is to investigate the mean velocity, turbulence shear stress, turbulence intensity, mean drop size distribution, and droplet data rate in a two-phase swirling jet using PDPA systems
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Source
12 refs, 11 figs
Record Type
Journal Article
Journal
KSME International Journal; ISSN 1226-4865;
; v. 12(5); p. 899-906

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Hassis, H.; Lauro, J.F.; Dueymes, E.
Transactions of the 12. international conference on Structural Mechanics in Reactor Technology (SMiRT). Volume J: Structural dynamics and extreme loads analysis1993
Transactions of the 12. international conference on Structural Mechanics in Reactor Technology (SMiRT). Volume J: Structural dynamics and extreme loads analysis1993
AbstractAbstract
[en] In this study, we analyse: the waves propagation and damping models in the case of two phases flow; the transfer of fluctuation between two points; the connection between one phase and two phases flow in order to model the cavitation flow. (author)
Primary Subject
Source
Kussmaul, K.F. (ed.); 370 p; ISBN 0-444-81515-5;
; 1993; p. 17-22; SMiRT 12: 12. international conference on Structural Mechanics in Reactor Technology; Stuttgart (Germany); 15-20 Aug 1993; 5 refs, 4 figs

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Book
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Hassis, H.; Dueymes, E.; Lauro, J.F.
Transactions of the 12. international conference on Structural Mechanics in Reactor Technology (SMiRT). Volume J: Structural dynamics and extreme loads analysis1993
Transactions of the 12. international conference on Structural Mechanics in Reactor Technology (SMiRT). Volume J: Structural dynamics and extreme loads analysis1993
AbstractAbstract
[en] First, we study the motion, the velocity, the phases plane and the acoustic sources associated to a spherical bubble in a compressible or incompressible medium. The bubble can be excited by periodic or random excitements. We study the parameters which influence their behaviour: periodicity or not of motion, implosion and explosion or oscillation of bubble. We take into account this behaviour in a model of cavitation: it is a numerical simulation using population of bubbles which are with positions (in the cavitation volume) and sizes are random. These bubbles are excited by a random excitement: a model of turbulent flow or implosion and explosion of bubble. (author)
Primary Subject
Source
Kussmaul, K.F. (ed.); 370 p; ISBN 0-444-81515-5;
; 1993; p. 71-76; SMiRT 12: 12. international conference on Structural Mechanics in Reactor Technology; Stuttgart (Germany); 15-20 Aug 1993; 6 refs, 11 figs

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