Abstract
Direct measurements of both velocity and temperature fluctuations in turbulent convection have been carried out. The velocity field is obtained from the electric potential induced by a DC magnetic field. It was found that, for weak amplitude of the magnetic field (less than 500 gauss), the velocity field behaves as in ordinary turbulence. Using spectra and histograms, the statistical properties of both fields were analysed. The velocity fluctuation spectra were close to those of temperature. It was also found that, the probability density functions (PDF) of the velocity fluctuations were weakly non-Gaussian shaped whereas the PDF of the temperature showed clear exponential tails.
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References
Camussi, R. and Verzicco, R. (1998) Convective turbulence in mercury: scaling law and frequency spectra, To appear in Physics of Fluids.
Cioni, S. (1998) Turbulent natural convection at low Prandtl number, To appear in Journal of Experimental Thermal and Fluid Science.
Cioni, S., Ciliberto, S. and Sommeria, J. (1995) Temperature structure functions in tur-bulent convection at low Prandtl number, Europhysics Letters 32 (5), 413–418.
Cioni, S., Ciliberto, S. and Sommeria, J. (1997) Strongly turbulent Rayleigh-Bénard convection in mercury: comparison with results at moderate Prandtl number, J. Fluid Mech. 335, 150–81;
Tsinober, A., Kit, E. and Teitel, M. (1987) On the relevance of the potential-differnce method for turbulence measurements, Journal of Fluid Mech. 175, 447.
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© 1998 Springer Science+Business Media Dordrecht
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Cioni, S., Sommeria, J. (1998). Velocity Fluctuation Properties in Mercury Convection. In: Frisch, U. (eds) Advances in Turbulence VII. Fluid Mechanics and Its Applications, vol 46. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5118-4_103
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DOI: https://doi.org/10.1007/978-94-011-5118-4_103
Publisher Name: Springer, Dordrecht
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