A calibration technique for multiple-sensor hot-wire probes and its application to vorticity measurements in the wake of a circular cylinder

Marasli, B.; Nguyen, Phuc N.; Wallace, J. M.

doi:10.1007/bf00189888

Cited by 52 publications

(24 citation statements)

References 11 publications

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“…The rms values of z from the ''vorticity probe'' agree well with those from X-wires y3-y8, thus providing another internal consistency check of the data. The present measurement has been compared with that of Marasli et al 17 and also Mi and Antonia. 21 Marasli et al used a twelve sensor vorticity probe with a spatial resolution of about 2 mm, while Mi and Antonia used two X wires, which were separated by 1.2 mm.…”

Section: Root Mean Square Distribution and Spectramentioning

confidence: 91%

“…A tiny peak is also identifiable in E x at f s L/U 1 Ϸ0.93, but not in E y . Marasli et al 17 observed a peak at f s in their z spectrum in a circular cylinder wake at x/dϭ30 and Reϭ2000, but not in either x or y spectra. The present vorticity data were approximately deduced from velocity signals.…”

Section: Root Mean Square Distribution and Spectramentioning

confidence: 99%

“…Similar attempts have been made by Tsinober et al 15 and Lemonis 16 in grid and boundary layer flows. Marasli et al 17 measured the three components of vorticity in a circular cylinder wake ͑x/dϭ30, where x is the streamwise distance downstream of the cylinder and d is the diameter of cylinder͒ with a twelve sensor hot-wire probe. In the present investigation, an approach similar to that of Bisset et al 11 is used for approximating the three vorticity components.…”

Section: Introductionmentioning

confidence: 99%

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Longitudinal and spanwise vortical structures in a turbulent near wake

2000

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Strain-vorticity induced secondary motion in shallow flows Phys. Fluids 24, 023601 (2012) Developed quantum turbulence and its decay Phys. Fluids 24, 011301 (2012) A fully resolved numerical simulation of turbulent flow past one or several spherical particles Phys. Fluids 24, 013303 (2012) Decaying versus stationary turbulence in particle-laden isotropic turbulence: Turbulence modulation mechanism Phys. Fluids 24, 015106 (2012) Cavitation inception during the interaction of a pair of counter-rotating vortices Phys. Fluids 24, 014107 (2012) Additional information on Phys. Fluids Approximations to the three vorticity components have been simultaneously obtained using a combination of four X wires in the near wake of a circular cylinder with the view of investigating the most likely interrelationship between quasilongitudinal rib-like structures and spanwise vortical structures. The conditional spanwise vorticity variance, based on detections of spanwise structures, shows a strong peak near the detections. This peak suggests a longitudinal extent of 1.0-1.3 cylinder diameters for the spanwise structures. The conditional streamwise vorticity variance has maxima near the saddle points on both sides of the detections, while the conditional lateral vorticity variance is maximum only downstream of the detections. The observations are interpreted in the context of rib-like structures wrapping around consecutive spanwise structures of opposite sign, a scenario which conforms with previous observations based on flow visualizations and direct numerical simulations. The probability density function of vorticity vectors in the plane of mean shear further suggests that the most likely inclination of the rib-like structures to the streamwise direction is about 50°. About 40% of the variances of streamwise and lateral vorticity components is associated with the spanwise vortical structures, apparently resulting from the three dimensionality of these structures; the ''remainder'' is largely attributed to the rib-like structures. Spanwise structures account for about 60%-80% of the spanwise vorticity variance.

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Section: Root Mean Square Distribution and Spectramentioning

confidence: 91%

Section: Root Mean Square Distribution and Spectramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Longitudinal and spanwise vortical structures in a turbulent near wake

2000

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“…While these quantities are available in direct numerical simulations of turbulent flows (e.g., [17,29,30]), only a few measurements have been attempted (e.g., [7,20,34,35]; see also [35]). Such measurements are useful for testing intermittency models (e.g., [21 ]), examining the properties of helicity ( [25,37]) and the correlation between velocity and vorticity [32,34].…”

Section: Introductionmentioning

confidence: 99%

On the correlation between enstrophy and energy dissipation rate in a turbulent wake

Zhu

Antonia

1996

Appl. Sci. Res.

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Abstract. All three components of the vorticity fluctuation have been measured simultaneously in a turbulent wake using a new eight-sensor vorticity probe. The vorticity fluctuation spectra agree reasonably well with those from a direct numerical simulation of a turbulent channel flow at high wavenumbers. The similarity between the instantaneous energy dissipation rate e and the instantaneous enstrophy ~O 2 is examined using spectra and probability density functions. The correlation between w z and e is evaluated in some detail. The homogeneous value of e is strongly correlated with w E. The full value of e and, more especially its isotropic value, are less well correlated with the enstrophy. Conditional averaging indicates that high enstrophy regions are associated with high energy dissipation rate regions.

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“…(4) - (6), (8), (19)). Marasli et al (1993) (4) employed the modified nine-sensor probe to measure all three components of the vorticity vector in a turbulent intermediate wake. Using a simpler configuration, Zhu and Antonia (1996) (5) used four cross-wires to measure simultaneously the three vorticity components in a turbulent far wake.…”

Section: Introductionmentioning

confidence: 99%

Orthogonal Wavelet-Decomposed 3-D Vorticity of a Turbulent Cylinder Wake

Rinoshika

Zhou

2006

JSME international journal. Ser. B, Fluids and thermal engineer

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A wavelet multi-resolution technique is applied to analyze the three vorticity components obtained simultaneously using an eight-wire probe in the far wake of a circular cylinder at a Reynolds number of 6 000. Using this technique, the vorticity is decomposed into a number of orthogonal wavelet components based on different central frequencies, which correspond to the scales of turbulent structures. The vortical structure of each wavelet component is examined in terms of vorticity variance. The present result shows a relatively large contribution to the longitudinal vorticity variance from the large-scale structures than both to the transverse and to the spanwise vorticity components. The dominant contributions to the vorticity variances are from the intermediate and relatively small-scale structures.

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A calibration technique for multiple-sensor hot-wire probes and its application to vorticity measurements in the wake of a circular cylinder

Cited by 52 publications

References 11 publications

Longitudinal and spanwise vortical structures in a turbulent near wake

Longitudinal and spanwise vortical structures in a turbulent near wake

On the correlation between enstrophy and energy dissipation rate in a turbulent wake

Orthogonal Wavelet-Decomposed 3-D Vorticity of a Turbulent Cylinder Wake

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