Titlebook: Recent Results in Laminar-Turbulent Transition; Selected numerical a Siegfried Wagner,Markus Kloker,Ulrich Rist Conference proceedings 2004

Watemelon

Numerical investigations of active control of boundary-layer instabilitiesthat the main mechanism of this concept lies in the change of the sign of the Reynolds stress of the participating modes. In addition, existing resonances are disrupted due to the modified phase speed of the controlled modes.

fetter

On a Universal Mechanism of Turbulence Production in Wall Shear Flowsbrief review of some previously obtained results in this field is presented. The main attention is concentrated on a comparative analysis of the nonlinear phenomena observed in boundary layers, channels, and pipe flows. The associated mechanisms of turbulence production are also compared with those

excrete

A general framework for stability, receptivity, and optimal controlte and adjoint equations until convergence to a maximum/minimum of an appropriately chosen cost functional is reached. This technique is capable of treating linear and nonlinear disturbance growth as well as non-uniform or unsteady base flows.

慢跑鞋

mercenary

DNS Investigations on the Laminar Breakdown in a Three-dimensional Boundary-Layer Flowons under manifold conditions, including steady or unsteady crossflow modes, transitioncontrol scenarios, or late transition in the region of adverse pressure gradient. The work presented has been performed within the scope of the project “Numerical investigations of the spatial development of pulse

遭受

Absolute/Convective Instability Investigation of Primary and Secondary Crossflow Vorticesabolized Stability Equations (PSE) and nonlinear equilibrium solutions for the DLR infinite swept-plate experiment. Of particular interest are highfrequency secondary instabilities which have been observed in several experiments shortly before transition. These secondary instabilities are computed b

Endearing

JOG

Systematic investigations of 3D acoustic receptivity with respect to steady and unsteady disturbanceto main influence parameters by means of wind tunnel experiments and Direct Numerical Simulations (DNS). A plane acoustic wave with frequency .. scatters at a specially designed localized roughness element, that is capable to vibrate with frequency ... The resulting Tollmien-Schlichting (TS) waves a

歌唱队

卵石