Christian leaders deplore wall
Tags: BOUNDARIES; WALLS
Related Articles
- Effect of wall suction on bursting in a turbulent boundary layer. Antonia, R. A.; Bisset, D. K.; Fulachier, L.; Anselmet, F. // Physics of Fluids A;Jul90, Vol. 2 Issue 7, p1241
The effect of suction on the wall region of a turbulent boundary layer over a slightly heated wall has been quantified in terms of several aspects of the motion that are related to bursts and sweeps. These events are detected by the modified u-level method (with alignment on the ends of bursts),...
- On the space-time characteristics of wall-pressure fluctuations. Choi, Haecheon; Moin, Parviz // Physics of Fluids A;Aug90, Vol. 2 Issue 8, p1450
A database obtained by direct numerical simulation of turbulent channel flow was used to compute the three-dimensional frequency/wave-number spectrum of wall-pressure fluctuations. The spectrum was used to deduce scaling laws for pressure fluctuations and to evaluate the similarity form for the...
- Laminar�turbulent transition of wall-jet flows subjected to blowing and suction. Cohen, Jacob; Amitay, Michael; Bayly, Bruce J. // Physics of Fluids A;Feb92, Vol. 4 Issue 2, p283
A new family of solutions describing the mean flow of an incompressible two-dimensional wall jet subjected to boundary suction or blowing was found, in which the vertical velocity at the wall varies in a power law with downstream distance. Linear stability calculations indicate that two unstable...
- Comparative measurements in the canonical boundary layer at Re delta[sub 2] less than or equal to... Fernholz, H.H.; Krause, E.; Nockermann, M.; Schober, M. // Physics of Fluids;Jun95, Vol. 7 Issue 6, p1275
Determines mean velocity and Reynolds-stress profiles in the incompressible turbulent boundary layer with zero pressure gradient on the aerodynamically smooth sidewall of the German-Dutch windtunnel. Information provided by the frequency domain of the flow; Calculation of the one-dimensional...
- Relationship between wall pressure and velocity-field sources. Chang III, Peter A.; Piomelli, Ugo // Physics of Fluids;Nov99, Vol. 11 Issue 11, p3434
Studies the velocity-field sources for the fluctuating wall pressure. Determination of the locations of velocity-field sources in the boundary layer; Simulation of a low Reynolds number, fully developed, turbulent channel flow; Significance of the viscous shear layer at the highest wavenumbers.
- Effect of a localized time-periodic wall motion on a turbulent boundary layer flow. Kim, Chulkyu; Jeon, Woo-Pyung; Park, Jinil; Choi, Haecheon // Physics of Fluids;Jan2003, Vol. 15 Issue 1, p265
The effect of a localized time-periodic wall motion on a turbulent boundary layer flow is experimentally investigated in this study. A part of the wall is replaced with a circular membrane (560 wall units in diameter) which moves up and down periodically in the wall-normal direction (56 wall...
- The wall-shear-stress contribution to boundary-layer noise. Hariri, H. Haj; Akylas, T. R. // Physics of Fluids (00319171);Sep85, Vol. 28 Issue 9, p2727
The effect of viscosity on the wall-pressure spectrum of a slightly compressible, turbulent boundary layer is studied. Apart the resolving the singularities of the inviscid spectrum, the viscous shear-stress dipole sources also partake in sound generation. The dominant viscous contribution to...
- Spatial filtering of wall pressure fluctuations beneath a turbulent boundary layer. Kudashev, E. // Acoustical Physics;Sep2007, Vol. 53 Issue 5, p629
Methods of experimental spatial filtering of wall pressure fluctuations beneath a turbulent boundary layer are developed with the aim of obtaining information on the wave number-frequency spectrum. The spatial filtering of the pressure field components by wave-vector filters is studied. The...
- Simple Models of the Characteristic Functional in Hydrodynamic Acoustics. Kudashev, E. B.; Yablonik, L. R. // Acoustical Physics;May2002, Vol. 48 Issue 3, p321
Simple models of the characteristic functional are considered in the context of analyzing the probabilistic characteristics of turbulent pressure fluctuations. The Gaussian model of the spatial characteristic functional of wall-pressure fluctuations is shown to be more appropriate for jet flows,...
