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Literatura académica sobre el tema "Oscillating Flow"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 5 de febrero de 2022

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Artículos de revistas sobre el tema "Oscillating Flow"

Blevins, R. D. "Application of the Discrete Vortex Method to Fluid-Structure Interaction". Journal of Pressure Vessel Technology 113, n.º 3 (1 de agosto de 1991): 437–45. http://dx.doi.org/10.1115/1.2928779.

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The discrete vortex method for numerical simulation of two-dimensional flows is applied to six problems in fluid-structure interaction: steady flow over bluff and streamlined sections, flow with transverse oscillations of the free stream, oscillation in otherwise still reservoir, vibration induced by steady flow, flow-induced vibration in oscillating flow, and impulsively started flow. Direct comparison is made with various formulations and with experimental data.

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Fabrikant, A. L. "Harbour oscillations generated by shear flow". Journal of Fluid Mechanics 282 (10 de enero de 1995): 203–17. http://dx.doi.org/10.1017/s0022112095000103.

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A new mechanism that could be responsible for excitation of long-period oscillations in partially enclosed harbours is discussed. This mechanism is based on the interaction between a shear flow and the harbour-basin natural mode and does not suppose any external exciting forces caused by wind waves, tsunami, etc. The growth rate of harbour oscillations is found in terms of a plane-wave reflection coefficient integrated on the wavenumber spectrum of the oscillating outflow field near the harbour entrance. Analytical considerations for simple shear flows (vortex sheet and jet) show that the growth rate changes its sign depending on the ratio of oscillation frequency to flow speed.

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Alassar, R. S. y H. M. Badr. "OSCILLATING VISCOUS FLOW OVER PROLATE SPHEROIDS". Transactions of the Canadian Society for Mechanical Engineering 23, n.º 1A (marzo de 1999): 83–93. http://dx.doi.org/10.1139/tcsme-1999-0006.

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The axisymmetric viscous oscillating flow over a prolate spheroid is considered. The oscillations are harmonic and the free stream is always parallel to the spheroid major axis. The flow is governed by the Strouhal and the Reynolds numbers as well as the spheroid axis ratio. In the present paper, we only investigate the effect of Reynolds number while keeping the Strouhal number and the axis ratio unchanged. The results are presented in terms of the periodic variation of the drag coefficient, pressure, surface vorticity, separation angle, the wake length, and the streamline and vorticity patterns for Reynolds numbers ranging from 5 to 100. Upon averaging the stream function and vorticity over one complete oscillation, the double boundary-layer structure observed in the case of a sphere is confirmed for the range of parameters considered.

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Bauer, Ronald J. y C. H. von Kerczek. "Stability of Liquid Film Flow Down an Oscillating Wall". Journal of Applied Mechanics 58, n.º 1 (1 de marzo de 1991): 278–82. http://dx.doi.org/10.1115/1.2897164.

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The stability of a liquid film flowing down an inclined oscillating wall is analyzed. First, the linear theory growth rates of disturbances are calculated to second order in a disturbance wave number. It is shown that this growth rate is simply the sum of the same growth rate expansions for a nonoscillating film on an inclined plate and an oscillating film on a horizontal plate. These growth rates were originally calculated by Yih (1963, 1968). The growth rate formula derived here shows that long wavelength disturbances to a vertical falling film, which are unstable at all nonzero values of the Reynolds number when the wall is stationary, can be stabilized by sufficiently large values of wall oscillation in certain frequency ranges. Second, the full time-dependent stability equations are solved in terms of a wall oscillation amplitude expansion carried to about 20 terms. This expansion shows that for values of mean flow Reynolds number less than about ten, the wall oscillations completely stabilize the film against all the unstable disturbances of the steady film.

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Yeung, R. W. y M. Vaidhyanathan. "Flow Past Oscillating Cylinders". Journal of Offshore Mechanics and Arctic Engineering 115, n.º 4 (1 de noviembre de 1993): 197–205. http://dx.doi.org/10.1115/1.2920112.

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The phenomenon of vortex shedding by oscillating cylinders is a complex one. Its understanding is, however, of utmost importance in marine-related engineering, particularly in connection with motions of deep submersibles and marine risers. In this paper, computational results are presented so that the behavior of the shedding as a function of certain parameter space can be elucidated. A methodology based on the random vortex method and a complex-variable boundary-integral formulation is used to study both forced and vortex-induced oscillations of a circular cylinder. Preliminary evaluation of this method indicates that it has been successful in predicting a number of experimentally observed behavior, among which the phenomena of “lock-in” associated with oscillations of the cylinder are well captured.

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Tozzi, J. T. y C. H. von Kerczek. "The Stability of Oscillatory Hagen-Poiseuille Flow". Journal of Applied Mechanics 53, n.º 1 (1 de marzo de 1986): 187–92. http://dx.doi.org/10.1115/1.3171709.

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The linear stability theory of the nonzero mean, sinusoidally oscillating flow in a tube of circular cross section is examined. It is found that the relevant axisymmetric disturbances in the oscillatory flow are more stable (i.e., have larger decay rates) than the axisymmetric disturbances of the mean flow alone. This result holds for values of the cross-sectional average oscillation velocity amplitude at least as large as seven-tenths the average mean-flow velocity amplitude. Although the instantaneous velocity profile contains generalized inflection rings for a substantial portion of the oscillation period, the disturbances do not become instantaneously unstable at any time, even for very low frequency oscillations.

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Chen, C. K., L. Wang, J. T. Yang y L. T. Chen. "Experimental and Computational Analysis of Periodic Flow Structure in Oscillatory Gas Flow Meters". Journal of Mechanics 22, n.º 2 (junio de 2006): 137–44. http://dx.doi.org/10.1017/s1727719100004433.

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AbstractThe oscillatory characteristics and dynamic structure of periodic flow in an oscillatory gas flow meter were studied experimentally and numerically. The flow oscillations were triggered by the Coanda effect and an universal correlation between Strouhal number and Reynolds number, Str = 1.09 × 10−3 for ReHD >800, was deduced based on spectral analysis of the pressure fluctuations in the flow channel. Numerical simulation indicated that the evolution of the flow patterns was classified into stages of induction and sustainable periodic oscillation. The transformation between the two stages was noticeably affected by the design of the feedback channels. The results further revealed that the development of the main vortex in the oscillating chamber and the small vortices at the entrance of the feedback channels concurrently modulate the mechanism of oscillation. The small vortices located at both entrances of the feedback channels play the role of a pair of modulating valves, which alternatively switch on and off the bypass flow through each feedback channel, thus reinforcing the periodic oscillation.

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Loewenberg, Michael. "Axisymmetric unsteady stokes flow past an oscillating finite-length cylinder". Journal of Fluid Mechanics 265 (25 de abril de 1994): 265–88. http://dx.doi.org/10.1017/s0022112094000832.

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The flow field generated by axial oscillations of a finite-length cylinder in an incompressible viscous fluid is described by the unsteady Stokes equations and computed with a first-kind boundary-integral formulation. Numerical calculations were conducted for particle oscillation periods comparable with the viscous relaxation time and the results are contrasted to those for an oscillating sphere and spheroid. For high-frequency oscillations, a two-term boundary-layer solution is formulated that involves two, sequentially solved, second-kind integral equations. Good agreement is obtained between the boundary-layer solution and fully numerical calculations at moderate oscillation frequencies. The flow field and traction on the cylinder surface display several features that are qualitatively distinct from those found for smooth particles. At the edges, where the base joins the side of the cylinder, the traction on the cylinder surface exhibits a singular behaviour, characteristic of steady two-dimensional viscous flow. The singular traction is manifested by a sharply varying pressure profile in a near-field region. Instantaneous streamline patterns show the formation of three viscous eddies during the decelerating portion of the oscillation cycle that are attached to the side and bases of the cylinder. As deceleration proceeds, the eddies grow, coalesce at the edges of the particle, and thus form a single eddy that encloses the entire particle. Subsequent instantaneous streamline patterns for the remainder of the oscillation cycle are insensitive to particle geometry: the eddy diffuses outwards and vanishes upon particle reversal; a simple streaming flow pattern occurs during particle acceleration. The evolution of the viscous eddies is most apparent at moderate oscillation frequencies. Qualitative results are obtained for the oscillatory flow field past an arbitrary particle. For moderate oscillation frequencies, pathlines are elliptical orbits that are insensitive to particle geometry; pathlines reduce to streamline segments in constant-phase regions close to and far from the particle surface.

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Hicks, Peter D. y Pierre Ricco. "Laminar streak growth above a spanwise oscillating wall". Journal of Fluid Mechanics 768 (6 de marzo de 2015): 348–74. http://dx.doi.org/10.1017/jfm.2015.98.

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The use of spanwise wall oscillations to attenuate the growth of laminar streaks within the incompressible Blasius boundary layer is investigated. As in the case of the flow above a stationary flat plate, studied by Leib et al. (J. Fluid Mech., vol. 380, 1999, pp. 169–203), free-stream convected gusts interact with the boundary layer to drive the streak growth. Spanwise wall oscillations can either reduce or increase the total energy of the laminar streaks, depending upon the wall oscillation amplitude and frequency, as well as the free-stream gust properties. Reductions in streak energies of up to 90 % are obtained, indicating that spanwise wall oscillations are an effective technique for attenuating the laminar streak growth. Therefore they may suppress secondary boundary-layer instabilities and delay transition. The laminar boundary-layer base flow matches the Blasius profile in the streamwise and wall-normal directions, while in the spanwise direction a generalized version of the classical Stokes layer profile (generated by a wall oscillating beneath a quiescent fluid) occurs, which evolves downstream due to non-parallel flow effects. Via a Wentzel–Kramers–Brillouin–Jeffreys analysis, this generalized Stokes layer is shown to approach the classical Stokes layer in the limit of large downstream distances or high-frequency plate oscillations. The laminar streaks forced by the generalized and the classical Stokes flows differ significantly, which implies that the choice of the spanwise base flow may affect the secondary instability and transition in this flow. The analysis also proves that the use of the classical Stokes layer as spanwise base flow, as employed by Hack & Zaki (Phys. Fluids. vol. 24 (3), 2012, 034101), is inappropriate.

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Huang, Yangyang, Monika Nitsche y Eva Kanso. "Hovering in oscillatory flows". Journal of Fluid Mechanics 804 (9 de septiembre de 2016): 531–49. http://dx.doi.org/10.1017/jfm.2016.535.

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We investigate the hovering dynamics of rigid bodies with up-down asymmetry placed in oscillating background flows. Recent experiments on inanimate pyramid-shaped objects in oscillating flows with zero mean component demonstrate that the resulting aerodynamic forces are sufficient to keep the object aloft. The mechanisms responsible for this lift production are fundamentally unsteady and depend on the shed vorticity. Here, we consider a model system of a two-dimensional flyer and compute the unsteady, two-way coupling between the flyer and the surrounding fluid in the context of the vortex sheet model. We examine in detail the flow properties (frequency and speed) required for hovering and their dependence on the flyer’s characteristics (mass and geometry). We find that, at low oscillation frequencies, a flyer of a fixed mass and shape requires a constant amount of flow acceleration to hover, irrespective of the frequency and speed of the oscillating flow. Meanwhile, at high oscillation frequencies, the flow speed required to hover is constant. In either case, the aerodynamic requirements to hover (flow acceleration or flow speed) are an intrinsic property of the flyer itself. This physical insight could potentially have significant implications on the design of unmanned air vehicles as well as on understanding active hovering of live organisms that can manipulate their flapping motion to favour a larger oscillation amplitude or frequency.

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Tesis sobre el tema "Oscillating Flow"

Osgood, David B. "Oscillating flow about perforated cylinders". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2000. http://handle.dtic.mil/100.2/ADA381845.

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Thesis (M.S. in Mechanical Engineering) Naval Postgraduate School, Sept. 2000.
Thesis advisor(s): Sarpkaya, T. Sarpkaya. "September 2000." Includes bibliographical references (p. 17). Also available in print.

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Hayder, Mir Mohammad Abu 1976. "Cross-flow past oscillating circular cylinders". Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=115685.

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The cross-flow past a pair of equal-diameter circular cylinders, arranged in a staggered configuration, was investigated experimentally in a closed-circuit water tunnel at Reynolds numbers, based on the mean-flow velocity and the cylinder diameter, within the lower subcritical range. The wake formation process was studied employing dye-injection flow visualization and hot-film measurements. The main emphasis was placed on acquiring a physical understanding of the mechanisms leading to vortex shedding, and particularly on the effect of a forced oscillation transverse to the flow direction of either of the two cylinders. For comparison purposes, investigations were also carried out with both cylinders stationary.
Experimental results showed that, for a reasonably large angle of incidence, the flow in the wake of a stationary cylinder pair could be characterized by two distinct periodicities, each of which was dominant on one side of the wake. Furthermore, for lower Reynolds numbers (Re < 1.0x10 4), there was an integral relationship between the two Strouhal numbers, but this integral relationship was no longer maintained for Re > 1.0x10 4. On the other hand, the flow around stationary cylinders for a small angle of incidence was characterized by a single Strouhal number, which remained approximately constant over the entire Reynolds number range.
For all the cylinder configurations investigated the wake flow patterns remained essentially the same as those of the corresponding static cases, when either of the two cylinders was forced to oscillate with a nondimensional forcing frequency less than approximately 0.10. However, beyond this value, the wake underwent considerable modification vis-a-vis when the cylinders were stationary, and the flow pattern within the wake was strongly dependent on the value of the forcing frequency. In particular, there were distinct regions of synchronization between the dominant wake periodicities and the cylinder oscillation; these synchronization regions involved sub- and superharmonics as well as fundamental synchronizations. With either upstream or downstream cylinder oscillation, the wake on the mean-flow side of the downstream cylinder synchronized with the shear layers separated from its outer surface, whereas synchronizations on the mean-flow side of the upstream cylinder were caused by the periodicities formed from the interaction of the other three shear layers.
The flow phenomena associated with the synchronizations were described in detail via flow visualization. The organization of the wake was strongly dependent on whether it was the upstream or downstream cylinder which was oscillating. The synchronized wake on the mean-flow side of the downstream cylinder at both lower and higher oscillation frequencies for upstream cylinder oscillation was observed to form either by the shedding of independent vortices or by the coalescence of two or more vortices. However, for downstream cylinder oscillation, although the synchronizations on this side of the wake at lower oscillation frequencies were caused by the shedding of independent vortices or by the coalescence of vortices, those at higher oscillation frequencies were the consequence of the coalescence of vortices only. For large incidence angles, the number of shear layers separated from the downstream cylinder which interacted with those separated from the upstream cylinder was critical in causing the synchronizations on the mean-flow side of the upstream cylinder.
In most cases, the flow for all the cylinder configurations traversed between the same patterns as those obtained when the cylinders were placed stationary at their minimum and maximum transverse spacings; but there were also some situations where the oscillation of either cylinder pushed the flow outside the regimes associated with the stationary configurations. The synchronization ranges obtained when the upstream or downstream cylinder was oscillating were different from each other, and these ranges were much wider than the corresponding synchronization ranges for a single oscillating cylinder. For two cylinders, an analysis of the fundamental synchronization showed that the frequency range over which this occurred was much broader for upstream cylinder oscillation than for downstream cylinder oscillation. Also, the fundamental synchronization ranges for downstream cylinder oscillation were closer to those for single cylinder oscillation in comparison to those for upstream cylinder oscillation.

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Alexandris, Georgios. "Supersonic flow past two oscillating airfoils". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1998. http://handle.dtic.mil/100.2/ADA350226.

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Thesis (M.S. in Applied Physics) Naval Postgraduate School, June 1998.
"June 1998." Thesis advisor(s): Max F. Platzer, James H. Luscombe, S. Weber. Includes bibliographical references (p. 71-72). Also available online.

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Yan, Baoshe. "Fluid flow induced by oscillating bodies and flows in cyclones". Thesis, University of Leeds, 1991. http://etheses.whiterose.ac.uk/435/.

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In this thesis the following aspects have been investigated: (i) the numerical solutions for unsteady 2-dimensional, incompressible viscous fluid flows induced by a harmonically oscillating cascade, and (ii) the fluid flows in industrial cyclones and their separation efficiencies. In the first part of the thesis we deal with fluid flows induced by harmonically oscillating cascades of cylinders with different cross sectional shapes. Numerical solutions for large amplitude oscillations of a cascade of normal flat plates are obtained by using a finite-difference method and it is found that solutions are in good agreement with some related experimental results. For small amplitude oscillations a perturbation method, series truncation technique and finite-difference methods are used to obtain solutions for cascades of normal flat plates and square cylinders. By assuming that the streaming Reynolds number is 0(1) then the outer streaming flows for cascades of square cylinders, normal flat plates and circular cylinders are investigated numerically for the streaming Reynolds number Rs up to 70. Conformal mapping, grid generation and boundary element methods are used to deal with the different geometries in order to determine the outer potential flows. For small values of the streaming Reynolds number it is found experimentally that the flow remains symmetrical and the numerically predicted fluid flow is in good agreement with the experimental results. As the value of the streaming Reynolds number increases then it is found experimentally that the flow develops asymmetries and this occurs when 8

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Gordon, David R. "Computational unsteady flow dynamics : oscillating flow about a circular cylinder". Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/28053.

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Pachalla, Seshadri Rajagopal. "Analysis of oscillating flow cooled SMA actuator". Texas A&M University, 2004. http://hdl.handle.net/1969.1/2669.

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Shape Memory Alloys (SMA) are a group of metallic alloys that have the ability to return to some previously defined shape or size when subjected to an appropriate thermal cycling procedure. In recent years there has been a lot of research on the development of small, light and, yet, powerful actuators for use in areas like robotics, prosthetics, biomimetics, shape control and grippers. Many of the miniaturized conventional actuators do not have sufficient power output to be useful and SMAs can be used advantageously here. The widespread use of SMAs in actuators is limited by their low bandwidth. Use of SMAs in two-way actuators requires that they undergo thermal cycling (heating and cooling). While SMAs can be heated quickly by resistive heating, conventional convection cooling mechanisms are much slower as the exothermic austenitic to martensitic phase transformation is accompanied by the release of significant amount of latent heat. While a number of cooling mechanisms have been studied in SMA actuator literature, most of the cooling mechanisms involve unidirectional forced convection. This may not be the most effective method. Oscillating flow in a channel can sometimes enhance heat transfer over a unidirectional flow. One possible explanation for this heat transfer enhancement is that the oscillatory flow creates a very thin Stokes viscous boundary-layer and hence a large time-dependent transverse temperature gradient at the heated wall. Therefore heat transfer takes place at a large temperature difference, thereby enhancing the heat transfer. In this work, the heat transfer from an SMA actuator under an oscillating channel is investigated and is compared to steady, unidirectional flow heat transfer. Oscillating flow is simulated using a finite volume based method. The resulting velocity field is made use of in solving the heat transfer problem using a finite difference scheme. A parametric study is undertaken to identify the optimal flow conditions required to produce the maximum output for a given geometry of the SMA actuator. The latent heat of transformation of the SMA is accounted for by means of a temperature dependent specific heat.

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Jayaprakash, Arvind Prakash. "Cavitating Flow over Stationary and Oscillating Hydrofoils". Cincinnati, Ohio : University of Cincinnati, 2008. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=ucin1205164937.

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Thesis (M.S.)--University of Cincinnati, 2008.
Committee/Advisors: Urmila Ghia PhD (Committee Chair), Kirti Ghia PhD (Committee Co-Chair), Milind Jog PhD (Committee Member). Title from electronic thesis title page (viewed Sep.3, 2008). Includes abstract. Keywords: Cavitation; Stationary; Oscillating; Hydrofoils. Includes bibliographical references.

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Yang, Hui. "3D unsteady flow in oscillating compressor cascade". Thesis, Durham University, 2004. http://etheses.dur.ac.uk/2835/.

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An experimental and computational study has been carried out to enhance current understanding of three dimensional (3D) cascade aeroelastic mechanisms. 3D unsteady pressure data produced during executing this project is the first-of-its-kind, which can be directly used for validation of advanced 3D numerical methods for the prediction of aeroelastic problems in turbomachines. A new, low speed flutter test rig with a linear compressor cascade consisting of seven Controlled-Diffusion Blades has been commissioned. The unsteady aerodynamics of the oscillating cascade is investigated using the Influence Coefficient Method, by which the middle blade is mechanically driven to oscillate in a 3D bending mode. Off-board pressure transducers are utilized to allow detailed measurement of the unsteady blade surface pressures in conjunction with a Tubing Transfer Function (TTF) method to correct tubing distortion errors. The linearity of the unsteady aerodynamic response is confirmed by tests with different oscillation amplitudes, which enables unsteady results of a tuned cascade to be constructed by using the Influence Coefficient Method at various inter-blade phase angles. An examination of the techniques adopted and experimental errors indicates a good level of accuracy and repeatability to be attained in the measurement of unsteady pressure. A detailed set of steady flow is obtained from the middle three blades, which demonstrates a reasonable blade-to-blade periodicity. At a nominal steady flow condition unsteady pressure measurements were performed at six spanwise sections between 20% and 98% span for three different reduced frequencies. The 2D laminar bubble-type separation around middle chord on the suction surface is identified to have a local effect on the unsteady flow. The measured results illustrate the fully 3D unsteady flow

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Semler, Cogan S. "Experimental investigation of an oscillating flow generator". Thesis, Monterey, California : Naval Postgraduate School, 2010. http://edocs.nps.edu/npspubs/scholarly/theses/2010/Mar/10Mar%5FSemler.pdf.

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Thesis (M.S. in Mechanical Engineering)--Naval Postgraduate School, March 2010.
Thesis Advisor(s): Platzer, Max. Second Reader: Hobson, Garth. "March 2010." Description based on title screen as viewed on April 23, 2010. Author(s) subject terms: Oscillating Wing, Tidal Power Production, Flutter, Renewable Energy, Flat Plate Lift Generation. Includes bibliographical references (p. 45). Also available in print.

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JAYAPRAKASH, ARVIND PRAKASH. "Cavitating Flow over Stationary and Oscillating Hydrofoils". University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1205164937.

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Libros sobre el tema "Oscillating Flow"

Alexandris, Georgios. Supersonic flow past two oscillating airfoils. Monterey, Calif: Naval Postgraduate School, 1998.

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Gordon, David R. Computational unsteady flow dynamics: Oscillating flow about a circular cylinder. Monterey, Calif: Naval Postgraduate School, 1991.

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Beyers, M. E. Flow-field interference produced by an asymmetrical support strut. Ottawa, Ont: National Research Council Canada, Institute for Aerospace Research, 1993.

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Lotshaw, John E. Numerical analysis of oscillating flow about a circular cylinder. Monterey, Calif: Naval Postgraduate School, 1992.

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Brydges, Bruce E. Flow visualization of dynamic stall on an oscillating airfoil. Monterey, Calif: Naval Postgraduate School, 1989.

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Coward, Adrian V. Stability of oscillatory two phase Couette flow. Hampton, Va: Institute for Computer Applications in Science and Engineering, 1993.

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Kozel, Karel. Numerical simulation of two-dimensional transonic flow over thin oscillating airfoil. Praha, Czechoslovakia: Information Centre for Aeronautics, 1986.

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Schippers, H. TULIPS: a method to calculate transonic potential flow about oscillating airfoils. Amsterdam, Netherlands: National Aerospace Laboratory, 1988.

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Srinivasan, G. R. Evaluation of turbulence models for unsteady flows of an oscillating airfoil. [New York]: Pergamon, 1995.

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Dadman, R. Flow around normal and yawed cylinders oscillating over a plane bed. Manchester: UMIST, 1996.

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Capítulos de libros sobre el tema "Oscillating Flow"

Bullard, E. C. y D. Gubbins. "Oscillating Disk Dynamo and Geomagnetism". En Flow and Fracture of Rocks, 325–28. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/gm016p0325.

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Ma, Hongbin. "Oscillating Flow and Heat Transfer of Single Phase in Capillary Tubes". En Oscillating Heat Pipes, 87–140. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4939-2504-9_3.

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Matsuo, Kazuyasu y Heuy-Dong Kim. "Measurement of Oscillating Shock Wave in Supersonic Nozzles". En Flow Visualization VI, 612–16. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84824-7_108.

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Go, Jeung Sang, Bo Sung Shin y Jong Soo Ko. "Self-Oscillating Microcantilever Piezoresistive Flow Sensor". En Experimental Mechanics in Nano and Biotechnology, 1347–50. Stafa: Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-415-4.1347.

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Luo, S. C. "Flow Visualization Study of Flow Past an Oscillating Square Cylinder". En Flow Visualization VI, 388–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84824-7_68.

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Huff, Dennis L. "Unsteady Flow Field Predictions for Oscillating Cascades". En Unsteady Aerodynamics, Aeroacoustics, and Aeroelasticity of Turbomachines and Propellers, 127–47. New York, NY: Springer New York, 1993. http://dx.doi.org/10.1007/978-1-4613-9341-2_7.

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Helvensteijn, B. P. M., A. Kashani, A. L. Spivak, P. R. Roach, J. M. Lee y P. Kittel. "Pressure Drop over Regenerators in Oscillating Flow". En Advances in Cryogenic Engineering, 1619–26. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4757-9047-4_203.

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Maleki, Maniya, Héctor Pacheco, Carlos Ruiz Suárez y Eric Clément. "Interfacial Instability of a Confined Suspension Under Oscillating Shear". En Traffic and Granular Flow ’07, 621–27. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-77074-9_68.

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van Buren, Simon y Wolfgang Polifke. "Heat Transfer in Pulsating Flow and Its Impact on Temperature Distribution and Damping Performance of Acoustic Resonators". En Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 97–111. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53847-7_6.

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Abstract A numerical framework for the prediction of acoustic damping characteristics is developed and applied to a quarter-wave resonator with non-uniform temperature. The results demonstrate a significant impact of the temperature profile on the damping characteristics and hence the necessity of accurate modeling of heat transfer in oscillating flow. Large Eddy Simulations are applied to demonstrate and quantify enhancement in heat transfer induced by pulsations. The study covers wall-normal heat transfer in pulsating flow as well as longitudinal convective effects in oscillating flow. A discussion of hydrodynamic and thermal boundary layers provides insight into the flow physics of oscillatory convective heat transfer.

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Aso, S., A. Sakamoto y M. Hayashi. "Numerical Flow Visualization of Separated Flows Around Oscillating Airfoil by Solving Incompressible Navier-Stokes Equations". En Flow Visualization VI, 757–61. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84824-7_135.

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Actas de conferencias sobre el tema "Oscillating Flow"

Disimile, P. J., J. M. Pyles y N. Toy. "Dynamic hydraulic jumps in oscillating containers". En MULTIPHASE FLOW 2007. Southampton, UK: WIT Press, 2007. http://dx.doi.org/10.2495/mpf070271.

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Ashrafi, Nariman y Sepideh Samghani. "Oscillating Viscoelastic Flow". En ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-85635.

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The flow of nonlinear viscoelastic fluids between oscillating parallel plates is investigated. The investigation features time-dependent analysis of a complicated viscoelastic material modeled based on the Johnson-Segalman constitutive relation. Given the rheological parameters of certain material known from experiments, the coefficients of Johnson-Segalman constitutive equation model for the material are evaluated by fitting the data. The problem is first formulated by writing the governing equations for the flow between two independently oscillating parallel plates, i.e. oscillating Couette flow. The velocity and stress are represented by symmetric and antisymmetric Chandrasekhar functions in space. Both inertia and normal stress effects are included. A numerical scheme is applied to solve the governing equations in time domain projected by Galerkin method. For given Reynolds number and viscosity ratio, one critical Weissenberg numbers is found at which an exchange of stability occurs between the Couette and other steady flows. The model is capable of predicting the nonlinear amplitude-dependent behavior of viscoelastic flows under single and multiple-frequency excitations.

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Wassen, Erik, Felix Kramer, Frank Thiele, Rene Grueneberger, Wolfram Hage y Robert Meyer. "Turbulent Drag Reduction by Oscillating Riblets". En 4th Flow Control Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2008. http://dx.doi.org/10.2514/6.2008-4204.

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Shliomis, Mark. "Non-Newtonian Ferrofluid Flow in Oscillating Magnetic Field". En FLOW DYNAMICS: The Second International Conference on Flow Dynamics. AIP, 2006. http://dx.doi.org/10.1063/1.2204532.

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Yachi, S. "Phase Separation of Block Copolymers Driven by Oscillating Particles". En FLOW DYNAMICS: The Second International Conference on Flow Dynamics. AIP, 2006. http://dx.doi.org/10.1063/1.2204563.

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Zagitov, R. A., N. V. Shuvaev, A. N. Dushko y Yu N. Shmotin. "Numerical Simulation of Unsteady Flow Around Oscillating Blade". En ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-69458.

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The paper is pointed to the problem of numerical simulation of unsteady flow around an oscillating blade in jet engine compressor. Single compressor rotor blade row is considered. It is assumed that mode shape and frequency of blade oscillation is not influenced by airflow. The system of governing equations is transformed to a moving coordinate system to describe blade oscillations. Multi-block structured “H-O” grid is used for spatial discretization. Inner boundary of “O”-grid (representing blade airfoil surface) is moved to describe blade airfoil oscillation. To minimize discretization error, special morphing procedure was developed for “O”-grid to accommodate blade airfoil surface motion. Other grid blocks remain steady. Nonlinear harmonic method is applied to integrate Euler equations on time variable. For spatial derivation Dispersion-Relation-Preserving methodology is applied. To maintain solution accuracy nonreflecting boundary conditions are implemented on artificial boundaries (inlet and outlet). Resulting system of nonlinear algebraic equations is resolved numerically. As an alternative, time-marching method is realized in ANSYS CFX by means of user routines. Numerical and experimental cascade results are compared.

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Liang, Shibin. "Oscillating Characteristics of Slug Flow in Oscillating Heat Pipes". En 9th AIAA/ASME Joint Thermophysics and Heat Transfer Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2006. http://dx.doi.org/10.2514/6.2006-3416.

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Gioria, Rafael S., Bruno S. Carmo y Julio R. Meneghini. "Three Dimensional Wake Structures of Flow Around an Oscillating Circular Cylinder". En ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2007. http://dx.doi.org/10.1115/omae2007-29268.

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Direct numerical simulationsthe three-dimensional flow around an oscillating circular cylinder are carried out. Imposed body oscillations are realized for low amplitude of oscillation, A/D = 0.4 and for high amplitudes, A/D = 1.0. As the intention is to analyze the amplitude influence in the wake dynamics, the frequency of oscillation is fixed and chosen to be inside the lock-in region, 0.95fs, where fs is the shedding frequency of fixed cylinder. The three-dimensional wake characteristics of the oscillatory body simulations are compared to the fixed body. Floquet stability analysis of two-dimensional oscillatory flow is carried out to complete the investigation and consistently analyze the three-dimensional flow results. The different unstable modes are identified for each of the cases, and they are found to depend basically on the vortex patterns.

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Tagawa, F. "Nonlinear Energy Response to Oscillating Temperature in the Free Energy Landscape Picture". En FLOW DYNAMICS: The Second International Conference on Flow Dynamics. AIP, 2006. http://dx.doi.org/10.1063/1.2204487.

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Trujillo, Steven, David Bogard, Kenneth Ball, Steven Trujillo, David Bogard y Kenneth Ball. "Turbulent boundary layer drag reduction using an oscillating wall". En 4th Shear Flow Control Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1997. http://dx.doi.org/10.2514/6.1997-1870.

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Informes sobre el tema "Oscillating Flow"

Lin, C. X. Heat Transfer Enhancement Through Self-Sustained Oscillating Flow in Microchannels. Fort Belvoir, VA: Defense Technical Information Center, mayo de 2006. http://dx.doi.org/10.21236/ada460536.

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Ali, Aamir, Surayya Saba, Saleem Asghar y Salman Saleem. Thermal and Concentration Effects of Unsteady Flow of Non-Newtonian Fluid over an Oscillating Plate. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, mayo de 2018. http://dx.doi.org/10.7546/crabs.2018.04.04.

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Chao, Shenn-Yu y Ping-Tung Shaw. Nonhydrostatic Numerical Investigations of Oscillating Flow Over Sills: Generation of Internal Tides and Solitary Waves. Fort Belvoir, VA: Defense Technical Information Center, septiembre de 2006. http://dx.doi.org/10.21236/ada630994.

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Chao, Shenn-Yu. Nonhydrostatic Numerical Investigations of Oscillating Flow over Sills: Generation of Internal Tides and Solitary Waves. Fort Belvoir, VA: Defense Technical Information Center, enero de 2007. http://dx.doi.org/10.21236/ada460750.

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J.C. Lin y D. Rockwell. Organized Oscillations of Initially-Turbulent Flow Past a Cavity. Office of Scientific and Technical Information (OSTI), septiembre de 2002. http://dx.doi.org/10.2172/821949.

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M. Geveci, P. Oshkai, D. Rockwell, J-C. Lin y M. Pollack. Imaging of the Self-Excited Oscillation of Flow Past a Cavity During Generation of a Flow Tone. Office of Scientific and Technical Information (OSTI), mayo de 2002. http://dx.doi.org/10.2172/821957.

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Murray, B. T., G. B. McFadden y S. R. Coriell. Stabilization of Taylor-Couette flow due to time-periodic outer cylinder oscillation. Gaithersburg, MD: National Institute of Standards and Technology, 1990. http://dx.doi.org/10.6028/nist.ir.90-4283.

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JEPSEN, RICHARD A., JESSE D. ROBERTS, JOSEPH Z. GAILANI y S. JARRELL SMITH. The SEAWOLF Flume: Sediment Erosion Actuated by Wave Oscillations and Linear Flow. Office of Scientific and Technical Information (OSTI), enero de 2002. http://dx.doi.org/10.2172/800775.

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Gharib, M., A. Roshko y V. Sarohia. Effect of Flow Oscillations on Cavity Drag and a Technique for Their Control. Fort Belvoir, VA: Defense Technical Information Center, septiembre de 1985. http://dx.doi.org/10.21236/ada165732.

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P Oshkai, M Geveci, D Rockwell y M Pollack. Imaging of Acoustically Coupled Oscillations Due to Flow Past a Shallow Cavity: Effect of Cavity Length Scale. Office of Scientific and Technical Information (OSTI), mayo de 2004. http://dx.doi.org/10.2172/836450.

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