Results 201 to 210 of about 3,296 (231)
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The turbulent Prandtl number in the near-wall region for low-Prandtl-number gas mixtures
International Journal of Heat and Mass Transfer, 1996Results of experiments for binary gas mixtures, with molecular Prandtl numbers in the range 0.18–0.7 in flow in a smooth circular tube with constant transport properties were employed to examine models hypothesized for the distribution of the turbulent Prandtl number, Prt,{{y+, Pr, Re}}.
D.M. McEligot, M.F. Taylor
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Coherent Structures and the Turbulent Prandtl Number
1989It is experimentally well established that heat spreads faster than momentum in free shear flows |1|. Thus, in the core of a jet, the turbulent Prandtl number Prt is about 0.7. Some measurements suggest that this break-down of the Reynolds analogy (which assumes Prt = 1) may be explained by the role of large-scale structures in the turbulent transport.
M. Favre-Marinet, G. Binder
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On the variation of the turbulent prandtl number in shear flows
International Communications in Heat and Mass Transfer, 1984Abstract Although the rapid distortion formulation proposed by Townsend (1976) qualitatively describes the variation in the turbulent Prandtl number Pr t among different shear flows, direct measurements of Pr t indicate that the experimental variation of Pr t is underestimated by his formulation.
K.R. Sreenivasan +2 more
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The prediction of turbulent Prandtl and Schmidt numbers
International Journal of Heat and Mass Transfer, 1975Abstract This paper examines more than thirty ways of predicting the relationship between turbulent transfers of momentum and a passive contaminant such as heat or dissolved matter. The models are divided into seven classes, on the basis of method of derivation or field of application.
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Turbulente Prandtl-Zahl Prt (turbulent Prandtl number Prt)
2000Es handelt sich urn eine Stromungsgrose (keine Stoffgrose), die in Analogie zur molekularen Prandtl-Zahl (einer Stoffgrose) eingefuhrt worden ist. Sie ist keine dimensionslose Kennzahl im Sinne der Dimensionsanalysis.
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Effect of the Prandtl number on a stratified turbulent wake
Physics of Fluids, 2010Direct numerical simulation is employed to study the effect of the Prandtl number, Pr=ν/α with ν the molecular viscosity and α the molecular diffusivity, on a turbulent wake in a stratified fluid. Simulations were conducted at a Reynolds number of 10 000, Re=UD/ν with U the velocity of the body and D the diameter of the body, for a range of Prandtl ...
de Stadler, Matthew B. +2 more
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Thermal turbulence at very small Prandtl number
Journal of Geophysical Research, 1962The equations of thermal turbulence are derived for the case of small Prandtl number, a case of a relatively simple realizable turbulent flow. The power spectrum of velocity is described using the transfer functions of Heisenberg and of Kovasznay. It is seen that these do not give uniformly good approximations, since they force spectral energy to flow ...
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Patterns of convective turbulence: an effect of Prandtl number
Physics of the Earth and Planetary Interiors, 1995Abstract Direct numerical modeling is used to study the influence of Prandtl number (Pr) on the style of high Rayleigh number thermal convection. The spline-characteristic method, an algorithm for direct numerical simulation of turbulent flows, is employed to simulate 3-D convection in the Boussinesq limit.
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Infinite Prandtl Number Turbulent Convection
Studies in Applied Mathematics, 1971openaire +1 more source
The effect of Prandtl number on decaying stratified turbulence
Journal of Turbulence, 2023James J. Riley +2 more
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