Relevant bibliographies by topics / Hydrodynamics instabilities

Academic literature on the topic 'Hydrodynamics instabilities'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

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

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Hydrodynamics instabilities.'

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.

Journal articles on the topic "Hydrodynamics instabilities"

1

Stevens, Ian R. "Colliding stellar winds: X-ray emission and instabilities." Symposium - International Astronomical Union 163 (1995): 486–94. http://dx.doi.org/10.1017/s0074180900202519.

Full text
Abstract:
Colliding stellar winds are an important part of early-type binaries. In this paper I discuss the phenomenon, concentrating mainly on the basic hydrodynamics of colliding winds, and the physics of X-ray emission. The following topics are covered:1) Basic physics: The basic characteristics of the shock-produced thermal X-ray emission, and discuss general trends of X-ray emission from colliding wind binaries (CWBs).2) Hydrodynamic simulations: Recent calculations have found that the interface in colliding winds is usually dynamically unstable, with three distinct instabilities.3) Gamma Velorum: recent ROSAT observations give much insight into colliding winds. I discuss recent hydrodynamic calculations pertaining to these observations.4) Radiation Hydrodynamics in CWBs: Recent calculations have included the effects of both radiation fields on the wind hydrodynamics in colliding wind systems.
APA, Harvard, Vancouver, ISO, and other styles
2

Proctor, M. R. E. "Hydrodynamics and nonlinear instabilities." European Journal of Mechanics - B/Fluids 18, no. 3 (May 1999): 562–63. http://dx.doi.org/10.1016/s0997-7546(99)90013-4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Arnett, David. "Theory, observation and experiment: stellar hydrodynamics." Symposium - International Astronomical Union 189 (1997): 389–94. http://dx.doi.org/10.1017/s0074180900116936.

Full text
Abstract:
Computer technology now allows two dimensional (2D) simulations, with complex microphysics, of stellar hydrodynamics and evolutionary sequences, and holds the promise for 3D. Careful validation of astrophysical methods, by laboratory experiment, by critical comparison of numerical and analytical methods, and by observation are necessary for the development of simulation methods with reliable predictive capability. Recent and surprising results from isotopic patterns in pre-solar grains, 2D hydrodynamic simulations of stellar evolution, and laser tests and computer simulations of Richtmeyer-Meshkov and Rayleigh-Taylor instabilities will be discussed, and related to stellar evolution and supernovae.
APA, Harvard, Vancouver, ISO, and other styles
4

Valcke, S., S. De Rijcke, E. Rödiger, and H. Dejonghe. "Kelvin-Helmholtz instabilities in smoothed particle hydrodynamics." Monthly Notices of the Royal Astronomical Society 408, no. 1 (July 15, 2010): 71–86. http://dx.doi.org/10.1111/j.1365-2966.2010.17127.x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Valcke, S., S. De Rijcke, and E. Röediger. "Kelvin-Helmholtz Instabilities in Smoothed Particle Hydrodynamics." EAS Publications Series 48 (2011): 405–6. http://dx.doi.org/10.1051/eas/1148088.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Jackson, David P., Raymond E. Goldstein, and Andrejs O. Cebers. "Hydrodynamics of fingering instabilities in dipolar fluids." Physical Review E 50, no. 1 (July 1, 1994): 298–307. http://dx.doi.org/10.1103/physreve.50.298.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

WOOD-VASEY, W. M., K. S. BUDIL, B. A. REMINGTON, S. G. GLENDINNING, A. M. RUBENCHIK, M. BERNING, J. O. KANE, and J. T. LARSEN. "Computational modeling of classical and ablative Rayleigh–Taylor instabilities." Laser and Particle Beams 18, no. 4 (October 2000): 583–93. http://dx.doi.org/10.1017/s0263034600184022.

Full text
Abstract:
Modeling plus simulations using the one-dimensional Lagrangian radiation-hydrodynamics code HYADES are compared with data from classical and ablative Rayleigh–Taylor experiments conducted on the Nova laser. Comparisons between the experiments and modeling for both the gross hydrodynamic motion and the perturbation evolution are made and show good agreement. A third order perturbation analysis is applied to demonstrate the onset of nonlinearity. A simple, physically intuitive saturation model is used to describe the growth further into the nonlinear regime. Finally, we present the first comparison of the Betti ablation front theory with indirect-drive RT data and obtain good agreement.
APA, Harvard, Vancouver, ISO, and other styles
8

Llamoza, Johan, and Desiderio A. Vasquez. "Structures and Instabilities in Reaction Fronts Separating Fluids of Different Densities." Mathematical and Computational Applications 24, no. 2 (May 17, 2019): 51. http://dx.doi.org/10.3390/mca24020051.

Full text
Abstract:
Density gradients across reaction fronts propagating vertically can lead to Rayleigh–Taylor instabilities. Reaction fronts can also become unstable due to diffusive instabilities, regardless the presence of a mass density gradient. In this paper, we study the interaction between density driven convection and fronts with diffusive instabilities. We focus in fluids confined in Hele–Shaw cells or porous media, with the hydrodynamics modeled by Brinkman’s equation. The time evolution of the front is described with a Kuramoto–Sivashinsky (KS) equation coupled to the fluid velocity. A linear stability analysis shows a transition to convection that depends on the density differences between reacted and unreacted fluids. A stabilizing density gradient can surpress the effects of diffusive instabilities. The two-dimensional numerical solutions of the nonlinear equations show an increase of speed due to convection. Brinkman’s equation lead to the same results as Darcy’s laws for narrow gap Hele–Shaw cells. For large gaps, modeling the hydrodynamics using Stokes’ flow lead to the same results.
APA, Harvard, Vancouver, ISO, and other styles
9

Ramaswamy, Sriram, and Madan Rao. "Active-filament hydrodynamics: instabilities, boundary conditions and rheology." New Journal of Physics 9, no. 11 (November 30, 2007): 423. http://dx.doi.org/10.1088/1367-2630/9/11/423.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Cha, Seung-Hoon, Shu-Ichiro Inutsuka, and Sergei Nayakshin. "Kelvin-Helmholtz instabilities with Godunov smoothed particle hydrodynamics." Monthly Notices of the Royal Astronomical Society 403, no. 3 (April 11, 2010): 1165–74. http://dx.doi.org/10.1111/j.1365-2966.2010.16200.x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Hydrodynamics instabilities"

1

Barber, Jacqueline Claire. "Hydrodynamics, heat transfer and flow boiling instabilities in microchannels." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/4000.

Full text
Abstract:
Boiling in microchannels is a very efficient mode of heat transfer with high heat and mass transfer coefficients achieved. Less pumping power is required for two-phase flows than for single-phase liquid flows to achieve a given heat removal. Applications include electronics cooling such as cooling microchips in laptop computers, and process intensification with compact evaporators and heat exchangers. Evaporation of the liquid meniscus is the main contributor to the high heat fluxes achieved due to phase change at thin liquid films in a microchannel. The microscale hydrodynamic motion at the meniscus and the flow boiling heat transfer mechanisms in microchannels are not fully understood and are very different from those in macroscale flows. Flow instability phenomena are noted as the bubble diameter approaches the channel diameter. These instabilities need to be well understood and predicted due to their adverse effects on the heat transfer. A fundamental approach to the study of two-phase flow boiling in microchannels has been carried out. Simultaneous visualisation and hydrodynamic measurements were carried out investigating flow boiling instabilities in microchannels using two different working fluids (n-Pentane and FC-72). Rectangular, borosilicate microchannels of hydraulic diameter range 700-800 μm were used. The novel heating method, via electrical resistance through a transparent, metallic deposit on the microchannel walls, has enabled simultaneous heating and visualisation to be achieved. Images and video sequences have been recorded with both a high-speed camera and an IR camera. Bubble dynamics, bubble confinement and elongated bubble growth have been shown and correlated to the temporal pressure fluctuations. Both periodic and nonperiodic instabilities have been observed during flow boiling in the microchannel. Analysis of the IR images in conjunction with pressure drop readings, have allowed the correlation of the microchannel pressure drop to the wall temperature profile, during flow instabilities. Bubble size is an important parameter when understanding boiling characteristics and the dynamic bubble phenomena. In this thesis it has been demonstrated that the flow passage geometry and microchannel confinement effects have a significant impact on boiling, bubble generation and bubble growth during flow boiling in microchannels.
APA, Harvard, Vancouver, ISO, and other styles
2

Cai, Kai. "Three-dimensional hydrodynamics simulations of gravitational instabilities in embedded protoplanetary disks." [Bloomington, Ind.] : Indiana University, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3229601.

Full text
Abstract:
Thesis (Ph.D.)--Indiana University, Dept. of Astronomy, 2006.
"Title from dissertation home page (viewed July 11, 2007)." Source: Dissertation Abstracts International, Volume: 67-08, Section: B, page: 4472. Adviser: Richard H. Durisen.
APA, Harvard, Vancouver, ISO, and other styles
3

Murphy, Jeremiah Wayne. "Multi-dimensional Hydrodynamics of Core-collapse Supernovae." Diss., The University of Arizona, 2008. http://hdl.handle.net/10150/194155.

Full text
Abstract:
Core-collapse supernovae are some of the most energetic events in the Universe, they herald the birth of neutron stars and black holes, are a major site for nucleosynthesis, influence galactic hydrodynamics, and trigger further star formation. As such, it is important to understand the mechanism of explosion. Moreover, observations imply that asymmetries are, in the least, a feature of the mechanism, and theory suggests that multi-dimensional hydrodynamics may be crucial for successful explosions. In this dissertation, we present theoretical investigations into the multi-dimensional nature of the supernova mechanism. It had been suggested that nuclear reactions might excite non-radial g-modes (the ε-mechanism) in the cores of progenitors, leading to asymmetric explosions. We calculate the eigenmodes for a large suite of progenitors including excitation by nuclear reactions and damping by neutrino and acoustic losses. Without exception, we find unstable g-modes for each progenitor. However, the timescales for growth are at least an order of magnitude longer than the time until collapse. Thus, the ε-mechanism does not provide appreciable amplification of non-radial modes before the core undergoes collapse. Regardless, neutrino-driven convection, the standing accretion shock instability, and other instabilities during the explosion provide ample asymmetry. To adequately simulate these, we have developed a new hydrodynamics code, BETHE-hydro that uses the Arbitrary Lagrangian-Eulerian (ALE) approach, includes rotational terms, solves Poisson’s equation for gravity on arbitrary grids, and conserves energy and momentum in its basic implementation. By using time dependent arbitrary grids that can adapt to the numerical challenges of the problem, this code offers unique flexibility in simulating astrophysical phenomena. Finally, we use BETHE-hydro to investigate the conditions and criteria for supernova explosions by the neutrino mechanism. We find that a critical luminosity/ mass-accretion-rate condition distinguishes non-exploding from exploding models in hydrodynamic 1D and 2D simulations. Importantly, the critical luminosity for 2D simulations is found to be ∼70% of the critical luminosity for 1D simulations. We identify the specifics ofmulti-dimensional hydrodynamic simulations that enable explosions at lower neutrino luminosities in 2D and discuss how these results might foreshadow successful explosions by eventual 3D radiation-hydrodynamic simulations.
APA, Harvard, Vancouver, ISO, and other styles
4

Hadley, Kathryn Z. 1955. "Linear stability analysis of nonaxisymmetric instabilities in self-gravitating polytropic disks." Thesis, University of Oregon, 2011. http://hdl.handle.net/1794/11253.

Full text
Abstract:
xvii, 371 p. : col. ill.
An important problem in astrophysics involves understanding the formation of planetary systems. When a star-forming cloud collapses under gravity its rotation causes it to flatten into a disk. Only a small percentage of the matter near the rotation axis falls inward to create the central object, yet our Sun contains over 99% of the matter of our Solar System. We examine how global hydrodynamic instabilities transport angular momentum through the disk causing material to accrete onto the central star. We analyze the stability of polytropic disks in the linear regime. A power law angular velocity of power q is imposed, and the equilibrium disk structure is found through solution of the time-independent hydrodynamic equations via the Hachisu self-consistent field method. The disk is perturbed, and the time-dependent linearized hydrodynamic equations are used to evolve it. If the system is unstable, the characteristic growth rate and frequency of the perturbation are calculated. We consider modes with azimuthal e im[varphi] dependence, where m is an integer and [varphi] is the azimuthal angle. We map trends across a wide parameter space by varying m , q and the ratios of the star-to-disk mass M * /M d and inner-to-outer disk radius r - /r + . We find that low m modes dominate for small r - /r + , increasing to higher r - /r + as M * /M d increases, independent of q . Three main realms of behavior are identified, for M * << M d , M * [approximate] M d and M * >> M d , and analyzed with respect to the I, J and P mode types as discussed in the literature. Analysis shows that for M * << M d , small r - /r + disks are dominated by low m I modes, which give way to high m J modes at high r - /r + . Low m J modes dominate M * [approximate] M d disks for small r - /r + , while higher m I modes dominate for high r - /r + . Behavior diverges with q for M * >> M d systems with high q models approximating M * [approximate] M d characteristics, while low q models exhibit m = 2 I modes dominating where r - /r + < 0.60.
Committee in charge: Raymond Frey, Chairperson; James Imamura, Advisor; Robert Zimmerman, Member; Paul Csonka, Member; Alan Rempel, Outside Member
APA, Harvard, Vancouver, ISO, and other styles
5

Simon, Jacob B., Philip J. Armitage, Andrew N. Youdin, and Rixin Li. "Evidence for Universality in the Initial Planetesimal Mass Function." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/626045.

Full text
Abstract:
Planetesimals may form from the gravitational collapse of dense particle clumps initiated by the streaming instability. We use simulations of aerodynamically coupled gas-particle mixtures to investigate whether the properties of planetesimals formed in this way depend upon the sizes of the particles that participate in the instability. Based on three high-resolution simulations that span a range of dimensionless stopping times 6 X 10(-3) <= tau <= 2, no statistically significant differences in the initial planetesimal mass function are found. The mass functions are fit by a power law, dN/dM(p) proportional to M-p(-p), with p = 1.5-1.7 and errors of Delta p approximate to 0.1. Comparing the particle density fields prior to collapse, we find that the high-wavenumber power spectra are similarly indistinguishable, though the large-scale geometry of structures induced via the streaming instability is significantly different between all three cases. We interpret the results as evidence for a near-universal slope to the mass function, arising from the small-scale structure of streaming-induced turbulence.
APA, Harvard, Vancouver, ISO, and other styles
6

Nuruzzaman, Shelly. "Study of parametric and hydrodynamic instabilities in laser produced plasmas." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391443.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Kazeroni, Rémi. "Explosion asymétrique des supernovae gravitationnelles." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS315/document.

Full text
Abstract:
L'explosion en supernova gravitationnelle représente le stade ultime de l'évolution des étoiles massives.La contraction du cœur de fer peut être suivie d'une gigantesque explosion qui donne naissance à une étoile à neutrons.La dynamique multi-dimensionnelle de la région interne, pendant les premières centaines de millisecondes, joue un rôle crucial sur le succès de l'explosion car des instabilités hydrodynamiques sont capables de briser la symétrie sphérique de l'effondrement.Les mouvements transverses et à grande échelle générés par deux instabilités, la convection induite par les neutrinos et l'instabilité du choc d'accrétion stationnaire (SASI),augmentent l'efficacité du chauffage de la matière par les neutrinos au point de déclencher une explosion asymétrique et d'impacter les conditions de naissance de l'étoile à neutrons. Dans cette thèse, les instabilités sont étudiées au moyen de simulations numériques de modèles simplifiés.Ces modèles permettent une vaste exploration de l'espace des paramètres et une meilleure compréhension physique des instabilités, généralement inaccessibles aux modèles réalistes.L'analyse du régime non-linéaire de SASI établit les conditions de formation d'un mode spiral et évalue sa capacité à redistribuer radialement le moment cinétique.L'effet de la rotation sur la dynamique du choc d'accrétion est également pris en compte.Si la rotation est suffisamment rapide, une instabilité de corotation se superpose à SASI et impacte grandement la dynamique.Les simulations permettent de mieux contraindre l'importance des modes non-axisymétriques dans le bilan de moment cinétique de l'effondrement du cœur de fer en étoile à neutrons.SASI pourrait sous certaines conditions accélérer ou ralentir la rotation du pulsar formé dans l'explosion.Enfin, une étude d'un modèle idéalisé de la région de chauffage est menée pour caractériser le déclenchement non-linéaire de la convection par des perturbations telles que celles produites par SASI ou les inhomogénéités de combustion pré-effondrement.L'analyse de la dimensionnalité sur le développement de la convection permet de discuter l'interprétation des modèles globaux et met en évidence les effets bénéfiques de la dynamique tridimensionnelle sur le déclenchement de l'explosion
A core-collapse supernova represents the ultimate stage of the evolution of massive stars.The iron core contraction may be followed by a gigantic explosion which gives birth to a neutron star.The multidimensional dynamics of the innermost region, during the first hundreds milliseconds, plays a decisive role on the explosion success because hydrodynamical instabilities are able to break the spherical symmetry of the collapse.Large scale transverse motions generated by two instabilities, the neutrino-driven convection and the Standing Accretion Shock Instability (SASI),increase the heating efficiency up to the point of launching an asymmetric explosion and influencing the birth properties of the neutron star.In this thesis, hydrodynamical instabilities are studied using numerical simulations of simplified models.These models enable a wide exploration of the parameter space and a better physical understanding of the instabilities, generally inaccessible to realistic models.The non-linear regime of SASI is analysed to characterize the conditions under which a spiral mode prevails and to assess its ability to redistribute angular momentum radially.The influence of rotation on the shock dynamics is also addressed.For fast enough rotation rates, a corotation instability overlaps with SASI and greatly impacts the dynamics.The simulations enable to better constrain the effect of non-axisymmetric modes on the angular momentum budget of the iron core collapsing into a neutron star.SASI may under specific conditions spin up or down the pulsar born during the explosion.Finally, an idealised model of the heating region is studied to characterize the non-linear onsetof convection by perturbations such as those produced by SASI or pre-collapse combustion inhomogeneities. The dimensionality issue is examined to stress the beneficial consequences of the three-dimensional dynamics on the onset of the explosion
APA, Harvard, Vancouver, ISO, and other styles
8

Simon, Jacob B., Philip J. Armitage, Rixin Li, and Andrew N. Youdin. "THE MASS AND SIZE DISTRIBUTION OF PLANETESIMALS FORMED BY THE STREAMING INSTABILITY. I. THE ROLE OF SELF-GRAVITY." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/621219.

Full text
Abstract:
We study the formation of planetesimals in protoplanetary disks from the gravitational collapse of solid over-densities generated via the streaming instability. To carry out these studies, we implement and test a particle-mesh self-gravity module for the ATHENA code that enables the simulation of aerodynamically coupled systems of gas and collisionless self-gravitating solid particles. Upon employment of our algorithm to planetesimal formation simulations, we find that (when a direct comparison is possible) the ATHENA simulations yield predicted planetesimal properties that agree well with those found in prior work using different numerical techniques. In particular, the gravitational collapse of streaming-initiated clumps leads to an initial planetesimal mass function that is well-represented by a power law, dN / dM(p) proportional to M-p(-p), with p similar or equal to 1.6 +/- 0.1, which equates to a differential size distribution of dN / dR(p) proportional to R-p(-q), with q similar or equal to 2.8 +/- 0.1. We find no significant trends with resolution from a convergence study of up to 512(3) grid zones and N-par approximate to 1.5 x 10(8) particles. Likewise, the power-law slope appears indifferent to changes in the relative strength of self-gravity and tidal shear, and to the time when (for reasons of numerical economy) self-gravity is turned on, though the strength of these claims is limited by small number statistics. For a typically assumed radial distribution of minimum mass solar nebula solids (assumed here to have dimensionless stopping time tau = 0.3), our results support the hypothesis that bodies on the scale of large asteroids or Kuiper Belt Objects could have formed as the high-mass tail of a primordial planetesimal population.
APA, Harvard, Vancouver, ISO, and other styles
9

Meyer, Christophe. "Experimental study of imprinting and hydrodynamic instabilities in laser and soft X-ray driven targets." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298814.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Riolfo, Luis Atilio. "Fingering instabilities in reactive and non ideal systems: an experimental approach." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209515.

Full text
Abstract:
Les instabilités de digitation sont des instabilités hydrodynamiques qui déforment l’interface entre deux fluides sous forme de doigts. Elles apparaissent lorsqu'un fluide plus mobile déplace un fluide moins mobile, ce qui peut être engendré par des gradients de densité (auquel cas on parlera de digitation de densité), de viscosité (digitation visqueuse) ou encore de tension de surface. Dans ce cadre, l’objectif de ce travail est d'étudier par une approche principalement expérimentale dans quelle mesure des réactions chimiques et des propriétés de mélange non idéal peuvent modifier voire induire de telles instabilités. Le but est de comprendre les dynamiques spatio-temporelles résultant de l’interaction entre réactions chimiques, diffusion, propriétés de mélange et instabilités de digitation. Pour ce faire, nous explorons expérimentalement et analysons à l’aide de modèles théoriques simples différentes dynamiques hydrodynamiquement instables dans des mélanges réactifs ou non idéaux.

Nous étudions tout d’abord l’évolution de la zone de mélange non idéal entre deux fluides purs lorsque le fluide le moins dense est placé au dessus du fluide le plus dense dans le champ de gravité. Nous montrons que le fait que la densité du mélange évolue de manière non monotone en fonction de sa composition peut être la source de digitation de densité. Nous étudions ensuite l'influence de réactions chimiques simples sur la digitation de densité à l'interface entre fluides miscibles et partiellement miscibles, en clarifiant l’impact de la diffusion différentielle entre divers solutés de solutions réactives et du taux de miscibilité sur le phénomène de digitation. Dans le cas de la digitation de viscosité, nous analysons tout d'abord dans quelle mesure une réaction chimique, en induisant des profils de viscosité non monotones, peut accroître ou limiter le développement de la digitation visqueuse. Nous démontrons de plus que, dans le déplacement stable d'un fluide moins visqueux par un fluide plus visqueux, une réaction chimique peut générer de la digitation visqueuse en induisant des profils de viscosité non monotones. Enfin, nous explorons expérimentalement l’étalement de films minces réactifs sur des substrats solides. Nous démontrons que, dans certaines conditions, des réactions chimiques peuvent induire des flux convectifs de Marangoni liés à des gradients de tension superficielle qui déstabilisent le bord du film par digitation, produisant un motif fractal.


Doctorat en Sciences
info:eu-repo/semantics/nonPublished

APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Hydrodynamics instabilities"

1

Charru, François. Hydrodynamic instabilities. Cambridge: Cambridge University Press, 2011.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

C, Godrèche, and Manneville P. 1946-, eds. Hydrodynamics and nonlinear instabilities. New York: Cambridge University Press, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Moiseev, S. S. Nonlinear instabilities in plasmas and hydrodynamics. Bristol: Institute of Physics, 2000.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Liang, Yu. Fundamental Studies of Shock-Driven Hydrodynamic Instabilities. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2992-2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Swinney, Harry L., and Jerry P. Gollub, eds. Hydrodynamic Instabilities and the Transition to Turbulence. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/3-540-13319-4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Constructive modeling of structural turbulence and hydrodynamic instabilities. New Jersey: World Scientific, 2009.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Belot͡serkovskiĭ, O. M. Constructive modeling of structural turbulence and hydrodynamic instabilities. New Jersey: World Scientific, 2009.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Belot︠s︡erkovskiĭ, O. M. Constructive modeling of structural turbulence and hydrodynamic instabilities. New Jersey: World Scientific, 2009.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

B, Hooper M., ed. Laser-plasma interactions 4: Proceedings of the thirty-fifth Scottish Universities' Summer School in Physics, St. Andrews, August 1988. Edinburgh, Scotland: The School, 1989.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Igochine, Valentin, ed. Active Control of Magneto-hydrodynamic Instabilities in Hot Plasmas. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44222-7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Hydrodynamics instabilities"

1

Akhatov, I. Sh, and R. G. Chembarisova. "The Thermoconvective Instability in Hydrodynamics of Relaxational Liquids." In Instabilities in Multiphase Flows, 277–87. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4899-1594-8_23.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Igochine, Valentin. "Magneto-Hydrodynamics and Operational Limits." In Active Control of Magneto-hydrodynamic Instabilities in Hot Plasmas, 9–51. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-44222-7_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Tveitereid, Morten, and Hanns Walter Müller. "Rayleigh-Bénard Convection with Weak Shear Flow: Absolute and Convective Instabilities." In Waves and Nonlinear Processes in Hydrodynamics, 303–14. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0253-4_24.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Drake, R. Paul. "Hydrodynamic Instabilities." In High-Energy-Density Physics, 183–254. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-67711-8_5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Matalon, Moshe. "Hydrodynamic Instabilities in Flames." In ICASE/NASA LaRC Series, 179–96. New York, NY: Springer New York, 1992. http://dx.doi.org/10.1007/978-1-4612-2884-4_10.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Goujon-Durand, Sophie, and José Eduardo Wesfreid. "Spatial Inhomogeneities of Hydrodynamic Instabilities." In Dynamics of Spatio-Temporal Cellular Structures, 203–10. New York, NY: Springer New York, 2006. http://dx.doi.org/10.1007/978-0-387-25111-0_11.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Maschke, E. K. "Methods in Magneto-Hydrodynamic Stability Theory." In Waves and Instabilities in Plasmas, 91–116. Vienna: Springer Vienna, 1994. http://dx.doi.org/10.1007/978-3-7091-2700-1_3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Rasio, Frederic A. "Hydrodynamic Instabilities in Close Binary Systems." In Evolutionary Processes in Binary Stars, 121–40. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-1673-9_7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Walgraef, Daniel. "Instabilities and Patterns in Hydrodynamical Systems." In Partially Ordered Systems, 15–24. New York, NY: Springer New York, 1997. http://dx.doi.org/10.1007/978-1-4612-1850-0_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Masterson, Robert E. "Flow Oscillations, Density Waves, and Hydrodynamic Instabilities." In Nuclear Reactor Thermal Hydraulics, 1169–200. Boca Raton : CRC Press, [2019]: CRC Press, 2019. http://dx.doi.org/10.1201/b22067-31.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Hydrodynamics instabilities"

1

Mach, Patryk. "Instabilities of the Riemann problem in relativistic hydrodynamics." In TOWARDS NEW PARADIGMS: PROCEEDING OF THE SPANISH RELATIVITY MEETING 2011. AIP, 2012. http://dx.doi.org/10.1063/1.4734459.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

van der Westhuizen, Izak, Brian van Soelen, Pieter Meintjes, and Jim Beall. "Hydrodynamics and Instabilities of Relativistic Astrophysical Jets in AGN." In Frontier Research in Astrophysics – II. Trieste, Italy: Sissa Medialab, 2017. http://dx.doi.org/10.22323/1.269.0081.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Thatte, Azam, and Xiaoqing Zheng. "Hydrodynamics and Sonic Flow Transition in Dry Gas Seals." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-26706.

Full text
Abstract:
Dry gas seals (DGS) are widely used in turbomachinery applications. They are recently being also recommended for sealing novel super critical CO2 turbomachinery space. However, these seals can render interesting behavior under certain operating conditions which needs to be carefully monitored so that intended level of dynamic characteristics can be achieved. The ability of these seals to maintain low leakage by riding at small clearances makes them an attractive solution where secondary flows need to be minimized. To understand the significance of some of the key design features of these seals, in this work an analysis on a gas lubricated spiral groove dry gas seal is presented. Equations in polar coordinates governing the compressible flow through the DGS gap and a numerical method to solve such non-linear partial differential equation is presented. The resulting sets of equations are solved for hydrodynamic pressure distribution and the axial separation force and the film stiffness at the rotor-stator interface is calculated. A detailed study on key spiral groove features is then performed to investigate the effect of spiral angle, groove depth, groove pitch and dam width ratio on the hydrodynamic pressure generation capacity, film stiffness and hence on overall performance of the DGS. Another important phenomenon that can occur in DGS under high operating pressure is the sonic transition. It is shown that choked flow under such conditions can take place over the dam section of the seal which manifests itself into large local pressure and temperature variations and can result into dynamic instabilities.
APA, Harvard, Vancouver, ISO, and other styles
4

Hasmatuchi, Vlad, Steven Roth, Francisco Botero, Mohamed Farhat, and Franc¸ois Avellan. "Hydrodynamics of a Pump-Turbine at Off-Design Operating Conditions: Numerical Simulation." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-06090.

Full text
Abstract:
Flow numerical simulations in a low specific speed radial pump-turbine scale model are performed to investigate off-design operating conditions in generating mode. The Best Efficiency Point (BEP) and the runaway operating conditions at 10° guide vanes opening are addressed. The computational domain includes the full reduced scale model water passage from the spiral casing inlet to the draft tube outlet. The numerical simulation is performed using the Ansys CFX code, solving the incompressible unsteady Reynolds-Averaged Navier-Stokes equations. Wall pressure measurements in the stator are used to validate the numerical results. Then, detailed analysis is focused on the onset of the flow instabilities when the machine is brought from BEP to runaway. In these severe operating conditions, one single stall cell is found to rotate with the impeller at subsynchronous speed in the vaneless gap between the impeller and the guide vanes. It is found to be the effect of flow separation developed at the inlet of several consecutive impeller channels which lead to their blockage.
APA, Harvard, Vancouver, ISO, and other styles
5

Lee, C. Y., and R. S. Cant. "Nonlinear Hydrodynamics of a Bluff-Body Stabilized Turbulent Premixed Flame." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-57492.

Full text
Abstract:
Bluff-body stabilized turbulent premixed flames can experience hydrodynamic instability caused by the interaction of the flame with small-scale vortices in the separated shear layer around the recirculation region, as well as with the large-scale coherent structures in the far-wake. A globally hydrodynamically unstable system, for example one which involves vortex shedding, can exhibit limit-cycle behaviour due to the coupling between pressure oscillation and velocity fluctuations. In this work, the hydrodynamic behaviour of a bluff-body stabilized turbulent premixed propane/air flame in a model jet-engine afterburner is investigated using Computational Fluid Dynamics (CFD). A URANS approach was found to be appropriate for the range of frequencies considered in this study. Combustion is modelled using a modified flame surface density (FSD) approach. The observed self-excited hydrodynamic oscillations are analyzed using a nonlinear dynamical framework which is capable of capturing elaborate nonlinear behaviour including quasiperiodicity and chaos. The results from the CFD are first validated using available experimental data. The velocity at the inlet is gradually increased from 14 m/s to 33 m/s and the global flame structure is observed. With increasing inlet velocity, the flame first transitions from steady state to an oscillating state with a symmetrical flame structure, and eventually to an asymmetrical flame structure at higher velocities. The flame is essentially steady in the lower range of velocities considered before transitioning to a limit cycle oscillation after a critical velocity is exceeded. A doubling in the frequency of the hydrodynamic oscillation is also observed at intermediate values of inlet velocity. This investigation demonstrates that turbulent premixed reacting flows can exhibit strong hydrodynamic oscillation. An understanding of such behaviour can assist in developing methods to control flow instabilities and therefore help in suppressing thermoacoustic oscillation.
APA, Harvard, Vancouver, ISO, and other styles
6

Diwakar, S. V., Sarit K. Das, and T. Sundararajan. "Numerical Prediction of Molten Metal Jet Dynamics, Fragmentation and Solidification in a Coolant Pool." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-23064.

Full text
Abstract:
The hydrodynamics of molten metal jet in a coolant pool is characterized by the presence of complex and diverse fluid structures whose formation is facilitated by various modes of instabilities acting on the fluid-fluid interface and the bulk material. The large spectrum of scales involved in these processes and the related non-linearities cloud a clear understanding of the associated physical phenomena. In order to overcome these difficulties, a numerical model has been developed in the current work, which aims to simulate the hydrodynamics, fragmentation and solidification of a molten metal jet in the coolant pool. The work uses an axisymmetric flow solver with the Volume of Fluid (VOF) interface tracking model to evaluate the macro features of the molten metal jet dynamics and to predict the evolution of interfacial instabilities. At the same time, the phenomena at the micro scale is predicted by a Lagrangian particle tracking model that is used to capture the dynamics and the heat interactions of the fragmented droplets formed from the disintegration of molten metal jet. The coupling between the two models is achieved by converting the molten fluid from VOF model into equivalent swarm of particles at the jet breakup length. The ability of the current coupled model is demonstrated using a sample test problem involving the dynamics of molten woods metal jet in a water pool.
APA, Harvard, Vancouver, ISO, and other styles
7

Ghanem, Akram, Thierry Lemenand, Dominique Della Valle, Charbel Habchi, and Hassan Peerhossaini. "Vortically Enhanced Heat Transfer and Mixing: State of the Art and Recent Results." In ASME 2012 Heat Transfer Summer Conference collocated with the ASME 2012 Fluids Engineering Division Summer Meeting and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ht2012-58045.

Full text
Abstract:
Longitudinal and transverse pressure-driven vortices induced by shear instabilities behind vortex generators play a crucial role in convective transport phenomena. The proven influence of these turbulence promoters on heat and mass transfer enhancement has led to their incorporation in modern multifunctional heat exchangers/reactors. The purpose of this work is to demonstrate experimentally the effects of hydrodynamics on the transfer processes accompanying such flows. The high-efficiency vortex (HEV) is an innovative static mixer and a low-energy-consumption heat exchanger designed to exploit these types of vortices. Results obtained in turbulent flow with embedded vorticity in an HEV static mixer are compared with numerical results in the literature. Both numerical and experimental results confirm the high energy efficiency of the HEV static mixer flow.
APA, Harvard, Vancouver, ISO, and other styles
8

Gambaryan-Roisman, Tatiana, and Peter Stephan. "Flow and Stability of Rivulets on Heated Surfaces With Topography." In ASME 4th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2006. http://dx.doi.org/10.1115/icnmm2006-96115.

Full text
Abstract:
Surfaces with topography promote rivulet flow patterns, which are characterized by a high cumulative length of contact lines. This property is very advantageous for evaporators and cooling devices, since the local evaporation rate in the vicinity of contact lines (micro region evaporation) is extremely high. The liquid flow in rivulets is subject to different kinds of instabilities, including the long-wave falling film instability (or the kinematic-wave instability), the capillary instability and the thermocapillary instability. These instabilities may lead to the development of wavy flow patterns and to the rivulet rupture. We develop a model describing the hydrodynamics and heat transfer in flowing rivulets on surfaces with topography under the action of gravity, surface tension, and thermocapillarity. The contact line behavior is modeled using the disjoining pressure concept. The perfectly wetting case is described using the usual h−3 disjoining pressure. The partially wetting case is modeled using the integrated 6-12 Lennard-Jones potential. The developed model is used for investigating the effects of the surface topography, gravity, thermocapillarity and the contact line behavior on the rivulet stability. We show that the long-wave thermocapillary instability may lead to splitting of the rivulet into droplets or into several rivulets, depending on the Marangoni number and on the rivulet geometry. The kinematic-wave instability may be completely suppressed in the case of the rivulet flow in a groove.
APA, Harvard, Vancouver, ISO, and other styles
9

Acharya, Vishal. "Optimum Injector Parameters for Thermoacoustic Stability in a Multi-Nozzle Can Combustion System." In ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/gt2022-83392.

Full text
Abstract:
Abstract High-frequency transverse instabilities are an important concern in can combustor configurations. In these configurations which are typically operated with multiple injectors around a central injector, each injector is subjected to different parts of the acoustic mode shape and thus respond differently for the same instability mode. Recent work by the author has modeled the response of premixed flames to excitation by natural high-frequency transverse modes in a can combustor both in the center and outer nozzles. The stability of these acoustically non-compact flames was assessed using the Rayleigh criterion (Rayleigh Integral denoted as RI) and not the overall unsteady heat release as is the case for compact flames. Several key control parameters were studied, namely — flame angle, swirling strength, nozzle location. For non-axisymmetric modes such as the commonly occurring 1-T mode, both radial and azimuthal offsets of the nozzle location affected stability. The framework was applied to an optimization study to identify the optimal combination of parameters that minimizes RI for the different nozzles in the multi-nozzle system. In this study, a N-around-1 configuration was studied, and the results indicated that the different nozzles needed to be operated at different flame angles and swirl numbers to result in an overall minimum RI. However, the specific response of the different injectors was not considered. The helical mode distribution at each injector varies as we azimuthally go around the combustor’s injector distribution and thus the most amplified mode and the resulting flame response would be different. To minimize RI, it is important to determine the injector configurations that result in a hydrodynamic profile that minimizes the individual RI for each nozzle. The resulting relationship between the injector’s flow and local hydrodynamics can then be used in a hydrodynamics study of an individual injector so that the most optimal injector is chosen depending on its location in the combustor dump plane.
APA, Harvard, Vancouver, ISO, and other styles
10

Karp, Joel R., Ernesto Mancilla, Paulo H. D. Santos, Moisés A. Marcelino Neto, and Rigoberto E. M. Morales. "Experimental Study of Bubble-Droplet Interactions in Improved Primary Oil Separation." In ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ajkfluids2019-5386.

Full text
Abstract:
Abstract The interactions between dispersed oil droplets and gas bubbles was experimentally studied in this work. An experimental set-up was built in the Multiphase Flow Research Center (NUEM) in the Federal University of Technology – Paraná (UTFPR) to conduct a fundamental evaluation of the interactions between sessile gas bubbles and oil droplets employing side-view flow visualization. Tap water was used as the continuous phase, whereas pure nitrogen and colored vegetable oil were employed as the dispersed phases. The bubble-droplet attachment consisted in the encapsulation of the bubble by the droplet, presenting phenomenological similarities to droplet-droplet coalescence. The contact between the dispersed phases induces the formation of a connecting bridge, which grows rapidly with time, with the height of the bridge being comparable to the size of the droplet after 57.0 ms. The inherent asymmetry of the phenomenon induced a significant horizontal displacement of the bubble towards the droplet, whose position remained unaltered. The evaluation of the bridge meniscus corroborated to this observation, since the contact angle on the droplet side decayed faster with time in comparison to the contact angle on the bubble side. The hydrodynamics of the rising aggregate is also evaluated, by the obtainment of its size, three-dimensional trajectory and terminal velocity. The stable aggregates formed presented an increase factor of 150 to 180%, based on the terminal velocity of the individual droplet. The radius of the bubble was found to be the major influence on the hydrodynamics of the aggregate, allowing the definition of a critical bubble radius based on trajectory instabilities.
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Hydrodynamics instabilities"

1

Frenkel, A. Hydrodynamic instabilities and coherent structures. Office of Scientific and Technical Information (OSTI), August 1991. http://dx.doi.org/10.2172/5924603.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Kubota, A., and W. Wolfer. Fully Atomistic Simulations of Hydrodynamic Instabilities and Mixing. Office of Scientific and Technical Information (OSTI), September 2006. http://dx.doi.org/10.2172/896006.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Frenkel, A. L. Hydrodynamic instabilities and coherent structures. Final technical report, 1990--1997. Office of Scientific and Technical Information (OSTI), April 1998. http://dx.doi.org/10.2172/656802.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Clark, D. S. Modeling Hydrodynamic Instabilities and Mix in National Ignition Facility Hohlraums. Office of Scientific and Technical Information (OSTI), October 2019. http://dx.doi.org/10.2172/1572235.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Marinak, M. M., R. E. Tipton, and B. A. Remington. Three-dimensional simulations of ablative hydrodynamic instabilities in indirectly driven targets. Office of Scientific and Technical Information (OSTI), June 1996. http://dx.doi.org/10.2172/376952.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Edwards, J. M., H. Robey, and A. Mackinnon. Gaseous laser targets and optical diagnostics for studying compressible hydrodynamic instabilities. Office of Scientific and Technical Information (OSTI), June 2001. http://dx.doi.org/10.2172/15006189.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Hassanein, Ahmed. Hydrodynamic and shock heating instabilities of liquid metal strippers for RIA. Office of Scientific and Technical Information (OSTI), May 2013. http://dx.doi.org/10.2172/1080267.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Edwards, M., J. Hansen, A. Miles, D. Froula, G. Gregori, S. Glenzer, A. Edens, and T. Dittmire. Gaseous Laser Targets and Optical Dignostics for Studying Compressible Turbulent Hydrodynamic Instabilities. Office of Scientific and Technical Information (OSTI), February 2005. http://dx.doi.org/10.2172/917507.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Frenkel, A. Hydrodynamic instabilities and coherent structures. Progress report, January 1--December 31, 1995. Office of Scientific and Technical Information (OSTI), August 1995. http://dx.doi.org/10.2172/195699.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Coffing, Shane. Modeling Hydrodynamic Instabilities, Shocks, and Radiation Waves in High Energy Density Experiments. Office of Scientific and Technical Information (OSTI), December 2022. http://dx.doi.org/10.2172/1906007.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Hydrodynamics instabilities' for particular source types:
Journal articles Dissertations / Theses Books
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!

To the bibliography