Simultaneous temperature and velocity Lagrangian measurements in turbulent thermal convection
نویسنده
چکیده
O. Liot1, F. Seychelles1, F. Zonta2, S. Chibbaro3,4, T. Coudarchet1, Y. Gasteuil5, J.-F. Pinton1, J. Salort1 and F. Chillà1,† 1Univ Lyon, ENS de Lyon, Univ Claude Bernard, CNRS, Laboratoire de Physique, F-69342 Lyon CEDEX 7, France 2Dip. Ing. Elettrica, Gestionale e Meccanica, Via delle scienze 208, 33100 Udine, Italy 3Sorbonne Universités, UPMC Univ Paris 06, UMR 7190, Institut Jean Le Rond d’Alembert, F-75005, Paris, France 4CNRS, UMR 7190, Institut Jean Le Rond d’Alembert, F-75005, Paris, France 5smartINST, 213 rue de Gerland, 69007 Lyon, France
منابع مشابه
Velocity and temperature cross-scaling in turbulent thermal convection
We analyse simultaneous velocity and temperature measurements in turbulent thermal convection. Our results show the existence of a cross-scaling between the normalized velocity and temperature structure functions, as implied by the Bolgiano–Obukhov scaling, at the centre of the convection cell. We find that the cross-scaling exponents are, however, different from the values implied by the Bolgi...
متن کاملExtraction of plumes in turbulent thermal convection.
We present a scheme to extract the velocity of buoyant structures in turbulent thermal convection from simultaneous local velocity and temperature measurements. Applying this scheme to measurements taken at positions within the convection cell where the buoyant structures are dominated by plumes, we obtain the temperature dependence of the plume velocity and understand our results using the equ...
متن کاملMeasurements of the local convective heat flux in turbulent Rayleigh-Bénard convection.
A systematic study of the local convective heat transport in turbulent thermal convection is carried out in small-aspect-ratio cells filled with water. The local convective heat flux is obtained from the simultaneous velocity and temperature measurements over varying Rayleigh numbers and spatial positions across the entire convection cell. Large fluctuations of the local convective heat flux ar...
متن کاملScaling of the local convective heat flux in turbulent Rayleigh-Bénard convection.
Local convective heat flux J(r) in turbulent thermal convection is obtained from simultaneous velocity and temperature measurements in a cylindrical cell filled with water. The measured J(r) in the bulk region shows a different scaling behavior with varying Rayleigh numbers compared with that measured in the plume-dominated regions near the sidewall and near the lower conducting plate. The loca...
متن کاملTest of steady-state fluctuation theorem in turbulent Rayleigh-Bénard convection.
The local entropy production rate sigma (r,t) in turbulent thermal convection is obtained from simultaneous velocity and temperature measurements in an aspect-ratio-one cell filled with water. The statistical properties of the time-averaged sigma (r,t) are analyzed and the results are compared with the predictions of the steady-state fluctuation theorem (SSFT) of Gallavotti and Cohen. The exper...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2016