Turbulent boundary layer at low Reynolds number

Abstract

Symmetry analysis and self-similar forms of fluid flow and heat-mass transfer in turbulent boundary layer flow of a nanofluid Phys. Fluids 24, 092003 (2012) Detuned resonances of Tollmien-Schlichting waves in an airfoil boundary layer: Experiment, theory, and direct numerical simulation Phys. Fluids 24, 094103 (2012) Asymptotic expansion of the solution of the steady Stokes equation with variable viscosity in a two-dimensional tube structure J. Math. Phys. 53, 103702 (2012) Large-eddy simulation of turbulent channel flow using explicit filtering and dynamic mixed models Phys. Fluids 24, 085105 (2012) Anisotropy in pair dispersion of inertial particles in turbulent channel flow Phys. Fluids 24, 073305 (2012) Additional information on Phys. Fluids

Density and velocity measurements in turbulent He-air boundary layers

“…in experiment 1) is in good agreement with other experiment at low Reynolds number [6]. Due to the variation of density, the corresponding friction velocity ) ) / ( (…”

“…On the other hand, because of the weak size of the wire and its moderate overheating, this one doesn't affect the response of the film. In homogeneous boundary layer which develops on the plate, the profiles of the longitudinal mean velocity and of its turbulent intensity measured with such a probe are in good agreement with other data [6]. The density at the wall W is measured directly by an aspirating probe which is insensitive to velocity fluctuations and the skin friction is given by a flush-mounted hot-film located in the same section (Fig.…”

Subsonic Boundary-Layer Wavefront Spectra for a Range of Reynolds Numbers

“…Any deviation between "optical" C f , computed from equation (15), and true C f simply indicates that the scaling assumptions are not valid at this Reynolds number. Figure 9 shows estimated values of C f , with error bars, from the OPD rms measurements; Figure 9 demonstrates that values of skinfriction "computed" from heated-wall wavefront measurements are consistent with experimental measurements of C f from Hama [19], Purtell, et al [20], Schultz-Grunow [21], and Österlund [22] in the low-Reynolds number range. From here we concluded that the prediction for OPD rms , equation (7), should be valid for Re θ > 4,000.…”

Kolmogorov flow in three dimensions

“…The initial turbulence spectrum was Iu(k)l -k2 exp -k2/4, with the u(k) having random phase; the total initial turbulent energy was 0.0025. There was an initial transient period during which the value of A in (7) was increased to A = 1.5 (from A = O.l), and the viscosity in (6) was decreased to Y = 0.0005 (from v = 0.001). After a quasi-steady state appeared to become established, the values of all the Fourier coefficients u(k) were saved for all integer values o f t from t = 150 to t = 650, inclusive, for a total of 501 time slices upon which to perform statistical evaluation.…”