2 edition of **instability of free shear layers.** found in the catalog.

instability of free shear layers.

Michalke, Alfons Dr. Ing.

- 48 Want to read
- 36 Currently reading

Published
**1970**
by Zentralstelle für Luftfahrtdokumentation und -information] in [München
.

Written in English

- Jets.,
- Boundary layer.

**Edition Notes**

Statement | von A. Michalke. |

Series | Deutsche Luft- und Raumfahrt., 70-04 |

Classifications | |
---|---|

LC Classifications | TL503 .D367 no. 70-04 |

The Physical Object | |

Pagination | 48 p. |

Number of Pages | 48 |

ID Numbers | |

Open Library | OL5771678M |

LC Control Number | 71512637 |

Buy Physics of Transitional Shear Flows: Instability and Laminar-Turbulent Transition in Incompressible Near-Wall Shear Layers (Fluid Mechanics and Its Applications) by Andrey V. Boiko, Alexander V. Dovgal, Genrih R. Grek, Victor V. Kozlov (ISBN: ) from Amazon's Book Store. Everyday low prices and free delivery on eligible orders. Polymer-based three-dimensional (3D) printing—such as the UV-assisted layer-by-layer polymerization technique—enables fabrication of deformable microstructured materials with pre-designed properties. However, the properties of such materials require careful characterization. Thus, for example, in the polymerization process, a new interphase zone is formed at the boundary between two Cited by: 1.

Summary. Addressing classical material as well as new perspectives, Instabilities of Flows and Transition to Turbulence presents a concise, up-to-date treatment of theory and applications of viscous flow instability. It covers materials from classical instability to contemporary research areas including bluff body flow instability, mixed convection flows, and application areas of aerospace and. Atmospheric instability is a condition where the Earth's atmosphere is generally considered to be unstable and as a result the weather is subjected to a high degree of variability through distance and time. Atmospheric stability is a measure of the atmosphere's tendency to discourage or deter vertical motion, and vertical motion is directly correlated to different types of weather systems and.

The Rayleigh–Taylor instability, or RT instability (after Lord Rayleigh and G. I. Taylor), is an instability of an interface between two fluids of different densities which occurs when the lighter fluid is pushing the heavier fluid. Examples include the behavior of water suspended above oil in the gravity of Earth, mushroom clouds like those from volcanic eruptions and atmospheric nuclear. The advantage of the wave interaction approach is that it provides a physical interpretation to shear flow instability. This paper is largely intended to purvey the basics of this physical interpretation to the reader, while both reviewing and consolidating previous work on the by:

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where K s is a constant which provides some information on the expansion rate of the momentum shear layer as the rate of expansion is proportional to 1/K analytical solution of the motion equation is equation () for two-dimensional jets.

For monophase free-shear layers, K s equals between 9 and with a generally accepted value of 11 (RajaratnamSchlichting.

Nikolaos D. Katopodes, in Free-Surface Flow, Free Shear Layers. The free shear or mixing layer is the simplest incarnation of turbulent free shear flow. It is a quasi-two-dimensional structure that develops when two fluid streams of substantially different velocity magnitude, but the same direction, are suddenly brought together, forming an interface in the streamwise direction.

Studies on secondary instability of separated shear layers in separation bubbles, i.e. a shear layer as instability of free shear layers. book result of a laminar boundary layer separation, or a shear layer formed due toAuthor: Zhiyin Yang.

In general a mixing layer is what is commonly called a "free shear layer". The mixing aspect arises because of the Kelvin-Helmholtz instability which causes it to wrap up into the so-called cats-eyes structures.

Instability of a smooth shear layer through wave interactions Article (PDF Available) in Physics of Fluids 31(8) August with 62 Reads How we measure 'reads'. The volume continues with the key aspect of the transition process, that is, receptivity of convectively unstable shear layers to external perturbations, summarizing main paths of the excitation of laminar flow disturbances.

The remainder of the book addresses the instability phenomena found at Cited by: Get this from a library. Linear instability of curved free shear layers. [William W Liou; United States. National Aeronautics and Space Administration.].

The linear spatial instability of inviscid compressible laminar mixing of two parallel streams, comprised of the same gas, has been investigated with respect to two-dimensional wave disturbances.

The effects of the velocity ratio, temperature ratio, and the temperature profile across the shear layer have been examined.

A nearly universal dependence of the normalized maximum amplification rate. Genre/Form: Electronic books: Additional Physical Format: Print version: Michalke, Alfons, Dr.-Ing. Instability of free shear layers.

[München, Zentralstelle für Luftfahrtdokumentation und -information] Abstract. The subharmonic resonance phenomenon in a free shear layer is studied experimentally and numerically.

Excitation using both fundamental and subharmonic at an initial phase difference (ϕ in shows stable pairing for a wide range of ϕ r, for a narrow range of ϕ in, either ‘shredding’ occurs or pairing is temporarily suppressed and occurs downstream without by: 2.

Various papers on turbulence and coherent structures are presented. Among the topics addressed are: emergence of characteristic motion in homogeneous turbulent shear flows, generation of coherent structures in free shear layers, use of the proper orthogonal decomposition in a plane turbulent mixing layer, 3D dynamics of coherent structures forming in free shear flows, visualizations of helium Author: Olivier Metais, Marcel Lesieur.

Shear Layer Finite Amplitude Secondary Instability Pairing Mode Dimensional Instability These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm by: 2.

The IUTAM Symposium on Nonlinear Instability of Nonparallel Flows was held at Clarkson University, Potsdam, NYUSA from 26 to 31 July It consisted of 9 general speeches, 35 lectures and 15 poster-seminar presentations.

The papers were grouped in fairly focused sessions on boundary. matter is restricted to incompressible boundary layers along an impermeable surface of zero curvature in the absence of body forces.

Gortler instability, free shear flowS, and stratified, rotating and compressible flows, are all excluded. The use of temporal and 9 9 Before proceeding furthcr, it is wcll to vention some general references. @article{osti_, title = {Internal waves and K-H instability in thermal layers of the advanced solar pond (ASP).

[Kelvin-Helmholtz]}, author = {Bemporad, G A and Rubin, H}, abstractNote = {The development of internal waves and instabilities of the Kelvin Helmholtz-type may prevent the density gradient maintenance which allows the proper functioning of the Advanced Solar Pond (ASP).

The Kelvin–Helmholtz instability (after Lord Kelvin and Hermann von Helmholtz) typically occurs when there is velocity shear in a single continuous fluid, or additionally where there is a velocity difference across the interface between two fluids.A common example is seen with wind blowing over water, the instability constant is able to manifest itself through waves on a water surface.

An experimental investigation of the instability of an incompressible, separated shear layer - Volume 26 Issue 2 - F. Browand Book chapters will be unavailable on Saturday 24th Cited by: @article{osti_, title = {The Kelvin-Helmholtz instability of boundary-layer plasmas in the kinetic regime}, author = {Steinbusch, Benedikt, E-mail: [email protected] and Gibbon, Paul, E-mail: @ and Department of Mathematics, Centre for Mathematical Plasma Astrophysics, Katholieke Universiteit Leuven and Sydora, Richard D., E-mail: [email protected] The IUTAM Symposium on Nonlinear Instability of Nonparallel Flows was held at Clarkson University, Potsdam, NYUSA from 26 to 31 July It consisted of 9 general speeches, 35 lectures and 15 poster-seminar presentations.

The papers were grouped in fairly focused sessions on boundary layers, shear flows, vortices, wakes, nonlinear waves and jets.

The symposium was fol lowed by a. Buy Physics of Transitional Shear Flows: Instability and Laminar Turbulent Transition in Incompressible Near-Wall Shear Layers (Fluid Mechanics and Its Applications) by Andrej V.

Boiko, Alexander V. Dovgal, G. Grek (ISBN: ) from Amazon's Book Store. Everyday low prices and free delivery on eligible orders. Abstract The problem of flow instability and turbulence is reexamined for the case of free mixing layers and jets.

It is argued that some rather simple stability considerations can describe the flow development whether the flow is fully turbulent or not. Turbulent free shear flows are subject to the well-known Kelvin-Helmholtz type [1] instability, and it is well-known that any free shear flow which approximates a thin vorticity layer will be unstable to a wide range of amplitudes and frequencies of : Michael J.

Stanek, Miguel R. Visbal, Donald P. Rizzetta, Stanley G. Rubin, Prem K. Khosla.Koochesfahani and C. E. Frieler, “Instability of non-uniform density free shear layers with a wake profile,” AIAA Paper No.Google Scholar by: