Mesure directe du taux de dissipation de l'énergie cinétique de turbulence par vélocimétrie laser bi-composante : validation dans une turbulence de grille

Michelet, Stéphane; Antoine, Yan; Lemoine, Fabrice; Mahouast, M.

doi:10.1016/s1251-8069(98)89005-2

Cited by 5 publications

(5 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is in good agreement with Cadiergue [7] and Michelet et al [20]. These authors found I x = 3% at x/M = 30.…”

Section: Mean and Turbulent Velocity Profilessupporting

confidence: 92%

“…This so-called ''energetic method'' has been successfully used by Tennekes and Lumley [28], Michelet [19], Michelet et al [20] and Cadiergue [7].…”

Section: Turbulent Kinetic Energy and Dissipationmentioning

confidence: 99%

“…When Cadiergue [7] indicates that 0.6 < k f /M < 1.3 for 20 < x/M < 80, Michelet et al [20] have found 0.5 < k f / M < 0.6 for 30 < x/M < 70. For Belmabrouck [2], the ratio k f /M evolves between 0.2 and 0.25 (20 < x/M < 50).…”

Section: Length Scales Of Turbulencementioning

confidence: 99%

See 2 more Smart Citations

Experimental investigation of the grid-generated turbulence features in a free surface flow

Murzyn

Bélorgey

2005

Experimental Thermal and Fluid Science

View full text Add to dashboard Cite

“…This is in good agreement with Cadiergue [7] and Michelet et al [20]. These authors found I x = 3% at x/M = 30.…”

Section: Mean and Turbulent Velocity Profilessupporting

confidence: 92%

“…This so-called ''energetic method'' has been successfully used by Tennekes and Lumley [28], Michelet [19], Michelet et al [20] and Cadiergue [7].…”

Section: Turbulent Kinetic Energy and Dissipationmentioning

confidence: 99%

See 1 more Smart Citation

Experimental investigation of the grid-generated turbulence features in a free surface flow

Murzyn

Bélorgey

2005

Experimental Thermal and Fluid Science

View full text Add to dashboard Cite

“…Tsinober et al 1992;Mydlarski & Warhaft 1996;Antonia et al 1998). On the other hand, the measurements of Michelet et al (1998), made via laser-Doppler anemometry, appear to satisfy (3.1b), although their results contain significant scatter. This observation would suggest that the measured anisotropy could be due to errors associated with the hot-wire measurements and not necessarily a characteristic of grid turbulence.…”

Section: Isotropy Of Velocity and Vorticity Fluctuationsmentioning

confidence: 88%

Effects of initial conditions in decaying turbulence generated by passive grids

2007

View full text Add to dashboard Cite

The effects of initial conditions on grid turbulence are investigated for low to moderate Reynolds numbers. Four grid geometries are used to yield variations in initial conditions and a secondary contraction is introduced to improve the isotropy of the turbulence. The hot-wire measurements, believed to be the most detailed to date for this flow, indicate that initial conditions have a persistent impact on the large-scale organization of the flow over the length of the tunnel. The power-law coefficients, determined via an improved method, also depend on the initial conditions. For example, the power-law exponent m is affected by the various levels of large-scale organization and anisotropy generated by the different grids and the shape of the energy spectrum at low wavenumbers. However, the results show that these effects are primarily related to deviations between the turbulence produced in the wind tunnel and true decaying homogenous isotropic turbulence (HIT). Indeed, when isotropy is improved and the intensity of the large-scale periodicity, which is primarily associated with round-rod grids, is decreased, the importance of initial conditions on both the character of the turbulence and m is diminished. However, even in the case where the turbulence is nearly perfectly isotropic, m is not equal to −1, nor does it show an asymptotic trend in x towards this value, as suggested by recent analysis. Furthermore, the evolution of the second-and third-order velocity structure functions satisfies equilibrium similarity only approximately.

show abstract

“…The use of LDA is established as a non-intrusive method for the assessment of fluid motion and turbulence at point locations (Belmabrouk and Michard, 2001;Galletti et al, 2005;Grunwald et al, 2001;Lemoine et al, 1997;Michelet et al, 1998;Pietri et al, 2000;Poggi et al, 2006;Stieger and Hodson, 2002;Yakhot and Orzag, 1986). A one-dimensional LDA probe (Dantec Fiber Flow System) with a water argon-ion laser producing a beam of wavelength 514.5 nm that was operating with a focal length of 160 mm (60 mm diameter probe) was used to measure the velocity of fine particles in the backward scatter mode.…”

Section: Measurement Techniquesmentioning

confidence: 99%

Hydrodynamic phenomena in the downcomer during flow rate transients in the primary circuit of a PWR

Cartland-Glover

Höhne

Kliem

et al. 2007

Nuclear Engineering and Design

View full text Add to dashboard Cite

Mesure directe du taux de dissipation de l'énergie cinétique de turbulence par vélocimétrie laser bi-composante : validation dans une turbulence de grille

Cited by 5 publications

References 4 publications

Experimental investigation of the grid-generated turbulence features in a free surface flow

Experimental investigation of the grid-generated turbulence features in a free surface flow

Effects of initial conditions in decaying turbulence generated by passive grids

Hydrodynamic phenomena in the downcomer during flow rate transients in the primary circuit of a PWR

Contact Info

Product

Resources

About