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Gotowe bibliografie tematyczne / Stratified bounded couette flow

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Gotowa bibliografia na temat „Stratified bounded couette flow”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "Stratified bounded couette flow"

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Vijayalakshmi, A.R.*. "STUDY OF EVOLUTION OF LINEARIZED DISTURBANCES IN A STRATIFIED BOUNDED COUETTE FLOW." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 6, no. 6 (2017): 464–71. https://doi.org/10.5281/zenodo.814790.

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Using initial value problem approach the evolution of linearized disturbances in a stratified shear flow is studied. The resulting equation in time posed by using Fourier transform is solved for the Fourier amplitudes for the case of bounded couette flow with point source of the field of transverse velocity and density as the initial distributions. For small values of Brunt frequency the perturbation solutions are obtained.

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Zhang, Dongrong. "Shape and scaling of the mean-velocity profile in thermally-stratified plane-Couette flows." Fluid Dynamics Research 53, no. 6 (2021): 065507. http://dx.doi.org/10.1088/1873-7005/ac451a.

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Abstract It has long been known from measurements that buoyant motions cause the mean-velocity profile (MVP) in thermally-stratified, wall-bounded turbulent flows to significantly deviate from its constant-density counterpart. Theoretical analysis has restricted attention to an ‘intermediate layer’ of the MVP, akin to the celebrated ‘log layer’ in the constant-density case. Here, for thermally-stratified plane-Couette flows, we study the shape and scaling of the whole MVP. We elucidate the mechanisms that dictate the shape of the MVP by using the framework of the spectral link (Gioia et al 201

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Zhou, Qi, John R. Taylor, and C. P. Caulfield. "Self-similar mixing in stratified plane Couette flow for varying Prandtl number." Journal of Fluid Mechanics 820 (May 4, 2017): 86–120. http://dx.doi.org/10.1017/jfm.2017.200.

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We investigate fully developed turbulence in stratified plane Couette flows using direct numerical simulations similar to those reported by Deusebioet al.(J. Fluid Mech., vol. 781, 2015, pp. 298–329) expanding the range of Prandtl number$Pr$examined by two orders of magnitude from 0.7 up to 70. Significant effects of$Pr$on the heat and momentum fluxes across the channel gap and on the mean temperature and velocity profile are observed. These effects can be described through a mixing length model coupling Monin–Obukhov (M–O) similarity theory and van Driest damping functions. We then employ M–O

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Brethouwer, G., Y. Duguet, and P. Schlatter. "Turbulent–laminar coexistence in wall flows with Coriolis, buoyancy or Lorentz forces." Journal of Fluid Mechanics 704 (July 2, 2012): 137–72. http://dx.doi.org/10.1017/jfm.2012.224.

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AbstractDirect numerical simulations of subcritical rotating, stratified and magneto-hydrodynamic wall-bounded flows are performed in large computational domains, focusing on parameters where laminar and turbulent flow can stably coexist. In most cases, a regime of large-scale oblique laminar-turbulent patterns is identified at the onset of transition, as in the case of pure shear flows. The current study indicates that this oblique regime can be shifted up to large values of the Reynolds number $\mathit{Re}$ by increasing the damping by the Coriolis, buoyancy or Lorentz force. We show evidenc

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Tuckerman, Laurette S., Matthew Chantry, and Dwight Barkley. "Patterns in Wall-Bounded Shear Flows." Annual Review of Fluid Mechanics 52, no. 1 (2020): 343–67. http://dx.doi.org/10.1146/annurev-fluid-010719-060221.

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Experiments and numerical simulations have shown that turbulence in transitional wall-bounded shear flows frequently takes the form of long oblique bands if the domains are sufficiently large to accommodate them. These turbulent bands have been observed in plane Couette flow, plane Poiseuille flow, counter-rotating Taylor–Couette flow, torsional Couette flow, and annular pipe flow. At their upper Reynolds number threshold, laminar regions carve out gaps in otherwise uniform turbulence, ultimately forming regular turbulent–laminar patterns with a large spatial wavelength. At the lower threshold

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Boubnov, B. M., E. B. Gledzer, and E. J. Hopfinger. "Stratified circular Couette flow: instability and flow regimes." Journal of Fluid Mechanics 292 (June 10, 1995): 333–58. http://dx.doi.org/10.1017/s0022112095001558.

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The stability conditions of the flow between two concentric cylinders with the inner one rotating (circular Couette flow) have been investigated experimentally and theoretically for a fluid with axial, stable linear density stratification. The behaviour of the flow, therefore, depends on the Froude number Fr = Ω/N (where Ω is the angular velocity of the inner cylinder and N is the buoyancy frequency of the fluid) in addition to the Reynolds number and the non-dimensional gap width ε, here equal to 0.275.Experiments show that stratification has a stabilizing effect on the flow with the critical

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Boubnov, B. "Stratified circular Couette flow: instability and flow regimes." International Journal of Multiphase Flow 22 (December 1996): 127. http://dx.doi.org/10.1016/s0301-9322(97)88413-3.

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Lortz, D. "On Rayleigh’s Stability Criterion for Couette Flow." Zeitschrift für Naturforschung A 48, no. 5-6 (1993): 703–4. http://dx.doi.org/10.1515/zna-1993-5-621.

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Abstract The stability problem of a stationary circular flow of an ideal fluid between two coaxial cylinders is considered. It is shown that Rayleigh's circulation criterion is necessary and sufficient for the total kinetic energy of an axisymmetric disturbance to be bounded in time.

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Hwang, Jong-Yeon, Kyung-Soo Yang, and Dong-Woo Kim. "Numerical Simulation of Stratified Taylor-Couette Flow." Transactions of the Korean Society of Mechanical Engineers B 30, no. 7 (2006): 630–37. http://dx.doi.org/10.3795/ksme-b.2006.30.7.630.

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Glazunov, A. V., G. V. Zasko, E. V. Mortikov, and Y. M. Nechepurenko. "Optimal disturbances of stably stratified turbulent Couette flow." Доклады Академии наук 487, no. 3 (2019): 257–61. http://dx.doi.org/10.31857/s0869-56524873257-261.

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Direct numerical simulation data of a stably stratified turbulent Couette flow contains two types of organized structures: the rolls that arise at neutral and close to neutral stratification, and the layered structures, which manifest themselves as the static stability increases. It is shown that both types of structures have spatial scales and forms that coincide with the scales and forms of the corresponding optimal disturbances of the simplified linear model of the Couette flow with the same Richardson numbers.

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Rozprawy doktorskie na temat "Stratified bounded couette flow"

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Olvera, Cabrera Daniel. "Coherent structures in stably stratified plane couette flow." Thesis, University of Bristol, 2017. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.723480.

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Oglethorpe, Rosalind Leigh Frances. "Mixing in stably stratified turbulent Taylor-Couette flow." Thesis, University of Cambridge, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708399.

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SACCO, FRANCESCO. "Mathematical models and analysis of turbulent, wall-bounded, complex flows." Doctoral thesis, Gran Sasso Science Institute, 2020. http://hdl.handle.net/20.500.12571/15321.

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In the classical wall bounded turbulent flow a fundamental statement is the existence of a layer, called overlap layer, in which every flow behaves the same and the mean streamwise velocity of each system can be described with only the wall normal coordinate with a logarithmic profile, characterized by the von Kármán constant. This law has been at first derived on data on parallel flows and boundary layer, that are model flows for wall turbulence, but indeed have a much simpler flow than complex shape geometries. The formulation of Millikan has much more general requirement on the flow and it

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Ferrante, Gioele, and Andres Morfin. "Interscale transport of Reynolds stresses in wall-bounded flows." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264187.

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Couette, pipe, channel, and zero-pressure gradient (ZPG) turbulent boundary layer (TBL) flows have classically been considered as canonical wall-bounded turbulent flows since their near-wall behavior is generally considered to be universal, i.e. invariant of the flow case and the Reynolds number. Nevertheless, the idea that large-scale motions, being dominant in regions further away from the wall, might interact with and influence small-scale fluctuations close to the wall has not been disregarded. This view was mainly motivated due to the observed failure of collapse of the Reynolds normal st

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Eaves, Thomas Scott. "Generalised nonlinear stability of stratified shear flows : adjoint-based optimisation, Koopman modes, and reduced models." Thesis, University of Cambridge, 2016. https://www.repository.cam.ac.uk/handle/1810/260824.

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In this thesis I investigate a number of problems in the nonlinear stability of density stratified plane Couette flow. I begin by describing the history of transient growth phenomena, and in particular the recent application of adjoint based optimisation to find nonlinear optimal perturbations and associated minimal seeds for turbulence, the smallest amplitude perturbations that are able to trigger transition to turbulence. I extend the work of Rabin et al. (2012) in unstratified plane Couette flow to find minimal seeds in both vertically and horizontally sheared stratified plane Couette flow.

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Książki na temat "Stratified bounded couette flow"

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Brekhovskikh, L. M. Acoustics of layered media II: Point source and bounded beams. Springer-Verlag, 1992.

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Brekhovskikh, L. M. Acoustics of layered media II: Point source and bounded beams. 2nd ed. Springer, 1999.

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Części książek na temat "Stratified bounded couette flow"

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García-Villalba, Manuel, Elena Azagra, and Markus Uhlmann. "A Numerical Study of Turbulent Stably-Stratified Plane Couette Flow." In High Performance Computing in Science and Engineering '10. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-15748-6_19.

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Müller, Christan, and Helmut Seidl. "Stratified Guarded First-Order Transition Systems." In Static Analysis. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-65474-0_6.

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AbstractFirst-order transition systems are a convenient formalism to specify parametric systems such as multi-agent workflows or distributed algorithms. In general, any nontrivial question about such systems is undecidable. Here, we present three subclasses of first-order transition systems where every universal invariant can effectively be decided via fixpoint iteration. These subclasses are defined in terms of syntactical restrictions: negation, stratification and guardedness. While guardedness represents a particular pattern how input predicates control existential quantifiers, stratificati

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Streszczenia konferencji na temat "Stratified bounded couette flow"

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Caulfield, C. P., and R. R. Kerswell. "RIGOROUS BOUNDS ON THE BUOYANCY FLUX IN TURBULENT STABLY STRATIFIED COUETTE FLOW." In Third Symposium on Turbulence and Shear Flow Phenomena. Begellhouse, 2003. http://dx.doi.org/10.1615/tsfp3.1270.

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Wang, Sheng, Kangbin Lei, Xilian Luo, Kiwamu Kase, Elia Merzari, and Hisashi Ninokata. "Cylindrical Couette Flow of a Rarefied Gas From Macro- to Micro-Scales." In ASME 2009 Fluids Engineering Division Summer Meeting. ASMEDC, 2009. http://dx.doi.org/10.1115/fedsm2009-78359.

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The cylindrical Couette flow of a rarefied gas from macro- to micro-scales, in the case where the inner cylinder is rotating whereas the outer cylinder is at rest, is extensively investigated by direct simulation Monte Carlo (DSMC) code incorporated with a Volume-CAD software. The generalized soft sphere (GSS) model is applied to an intermolecular collision calculation. The diffuse reflection model and Cercignani-Lampis-Lord (CLL) model are used to model the molecule-surface interaction by considering the accommodation coefficients on inner cylinder (ACI hereafter) and outer cylinder (ACO here

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Attia, Hazem A. "Unsteady MHD Couette Flow and Heat Transfer Between Parallel Porous Plates With Exponential Decaying Pressure Gradient." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-80213.

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The unsteady Couette flow of an electrically conducting, viscous, incompressible fluid bounded by two parallel non-conducting porous plates is studied with heat transfer. An external uniform magnetic field and a uniform suction and injection are applied perpendicular to the plates while the fluid motion is subjected to an exponential decaying pressure gradient. The two plates are kept at different but constant temperatures while the Joule and viscous dissipations are included in the energy equation. The effect of the magnetic field and the uniform suction and injection on both the velocity and

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Karion, Anna, and Melany L. Hunt. "Energy Dissipation in Sheared Granular Flows." In ASME 1998 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/imece1998-0602.

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Abstract Flows of granular materials play an important role in industry and in nature. This research focuses on shear flows of particles of the same size and of two different sizes and the energy dissipation associated with these flows. The study was performed using a two dimensional discrete element computer simulation of a bounded, gravity-free Couette flow of particles. The heat dissipation rate per unit area in these flows is presented as a function of position in the flow as well as overall solid fraction. Results compare favorably with kinetic theory results from Jenkins and Richman (198

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Hartung, Konrad M., and Karsten Oehlert. "Drag Reduction by Riblet-Structures With Limited Tip Sharpness – An Experimental and Numerical Survey." In ASME 2024 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2024. https://doi.org/10.1115/imece2024-144187.

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Abstract In wall-bounded flows, to which most technical applications belong, viscous drag restricts the aerodynamic efficiency. Riblets, functional surface structures inspired by the dermal denticles of fast swimming sharks, are capable of reducing the wall shear stress and thus increase the efficiency by interacting with the overlying turbulent flow phenomena. As the dimensions of these functional surface structures are usually within the micrometer range, their manufacturing still poses great challenges. This especially applies for the riblet tip width also referred to as the riblet tip shar

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Awad, M. M., and Y. S. Muzychka. "Bounds on Two-Phase Frictional Pressure Gradient in Minichannels and Microchannels." In ASME 4th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2006. http://dx.doi.org/10.1115/icnmm2006-96174.

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Simple rules are developed for obtaining rational bounds for two-phase frictional pressure gradient in minichannels and microchannels. The lower bound is based on Ali et al. correlation for laminar-laminar flow. This correlation is based on modification of simplified stratified flow model derived from the theoretical approach of Taitel and Dukler for the case of two-phase flow in a narrow channel. The upper bound is based on Chisholm correlation for laminar-laminar flow. The model is verified using published experimental data of two-phase frictional pressure gradient in circular and non-circul

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Jo, Jong Chull, Young Hwan Choi, and Seok Ki Choi. "Numerical Analysis of Unsteady Conjugate Heat Transfer and Thermal Stress for a PWR Pressurizer Surge Line Pipe Subjected to Thermal Stratification." In ASME 2002 Pressure Vessels and Piping Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/pvp2002-1137.

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This paper addresses three-dimensional numerical analyses of the unsteady conjugate heat transfer and thermal stress for a PWR pressurizer surge line pipe with a finite wall thickness, subjected to internally thermal stratification. A primary emphasis of the present study is placed on the investigation of the effects of surge flow direction on the determinations of the transient temperature and thermal stress distributions in the pipe wall. In the present numerical analysis, the thermally stratified flows (in-surge flow and out-surge flow) in the pipe line are simulated using the standard κ-ε

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Simpson, Mark W., Arne J. Pearlstein, and Ari Glezer. "Power Generation From Concentrated Solar-Heated Air Using Buoyancy-Induced Vortices." In ASME 2012 6th International Conference on Energy Sustainability collocated with the ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/es2012-91437.

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Thermally-stratified air layers overlying solar-heated ground are exploited for power generation by the deliberate formation of intense buoyancy-induced vertical columnar vortices, similar to naturally-occurring desert “dust devils.” In hot-climate regions, such buoyancy-driven columnar vortices occur spontaneously with core diameters of 1–50 m at the surface and heights up to one km, leading to flows with considerable angular and axial momentum. Unlike “dust devil” vortices, which are typically free to wander laterally and are therefore susceptible to crosswind, anchored columnar vortices are

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