Results 201 to 210 of about 1,260,868 (229)

The effect of the Prandtl number on magnetoconvection in a horizontal fluid layer

International Journal of Heat and Mass Transfer, 2018
Abstract Linear stability of the buoyant convective flow subject to a uniform magnetic field is investigated. The flow configuration consists of a differentially heated extended horizontal layer of an electrically conducting fluid, placed in a constant vertical magnetic field.
A. Hudoba, S. Molokov
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The Dependence of Eddy Diffusivity on the Fluid Prandtl Number

1959
Publisher Summary This chapter attempts to predict the shape of the energy spectrum F (k) for isotropic velocity fluctuations in an incompressible fluid. It discusses the analysis of isotropic temperature fluctuations in an isotropic turbulence. It was also suggested that the rate of transfer of temperature fluctuation “energy” through wave number ...
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Turbulence in a Fluid Stratified by a High Prandtl-Number Scalar

2017
Turbulence in the fluid stratified by a high Prandtl-number (Pr) scalar such as heat (Pr = 7) or salinity (Pr = 700) has been simulated by direct numerical simulations, using 40963 grid points. Computations have been performed using the 1024 nodes of NEC SX-ACE, which have enabled us to resolve the smallest scale of salinity fluctuations \(\sqrt{ 700}(\
Shinya Okino, Hideshi Hanazaki
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Transient Forced Convection in Fluids With Vanishing Prandtl Number

Journal of Heat Transfer, 1988
The analytical solution of transient heat transfer from incompressible laminar boundary layer flows over a curved surface when the Prandtl number is zero was attempted by Soliman and Chambre using Fourier transforms and the method of characteristics. The same problem was addressed by Biasi using the von Karman-Pohlhausen integral method.
R. W. Lycans, B. T. F. Chung
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Instabilities of convection rolls in a fluid of moderate Prandtl number

Journal of Fluid Mechanics, 1979
The instabilities of two-dimensional convection rolls in a horizontal fluid layer heated from below are investigated in the case when the Prandtl number is seven or lower. Two new mechanisms of instability are described theoretically as well as experimentally.
F. H. Busse, R. M. Clever
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Ludwig Prandtl and Early Fluid Dynamics in the Netherlands

2000
The influence of Ludwig Prandtl on the early development of fluid dynamics in the Netherlands is described from a viewpoint determined by the author’s experience as professor in aircraft aerodynamics at Delft Aerospace. Since J.M. Burgers can be considered as the “father of fluid dynamics” in the Netherlands, the personal contacts between Prandtl and ...
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Decaying turbulence in a stratified fluid of high Prandtl number

Journal of Fluid Mechanics, 2019
Decaying turbulence in a density-stratified fluid with a Prandtl number up to $Pr=70$ is investigated by direct numerical simulation. In turbulent flow with a Prandtl number larger than unity, it is well known that the passive scalar fluctuations cascade to scales smaller than the Kolmogorov scale, and show the $k^{-1}$ spectrum in the viscous ...
Shinya Okino, Hideshi Hanazaki
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COMPUTER VISUALIZATION OF FLUID CIRCULATION IN ANNULI OF HEATED ROTATING CYLINDERS OF LOW PRANDTL NUMBER FLUIDS

Recent Advances in Computational Science and Engineering, 2002
The present work considered fluid circulation in an annular region between two cylinders with the inner cylinder heated and rotating. The Prandtl number (Pr) considered here varies from 0.01 to 1.0 and Rayleigh number (Ra) is of the order of 105. Reynolds number Re in the range of 0 to 1120 was considered.
Lee, T.S., Xu, Z., Huo, Y.
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On the time-dependent convective heat transfer in fluids with vanishing prandtl number

International Journal of Heat and Mass Transfer, 1969
Abstract Analytical solutions are presented for the transient heat transfer in forced convection flow over a curved wall when the Prandtl number is zero. The wall is subjected to either a variation in temperature or a variation in the heat flux. As an application, the solutions are computed for the case of wedge flows.
Soliman, Moustafa, Chambre, P. L.
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Coriolis effect on convection for a low Prandtl number fluid

International Journal of Non-Linear Mechanics, 2004
Abstract The problem of finite-amplitude thermal convection in a horizontal layer of a low Prandtl number heated from below and rotating about a vertical axis is studied. Linear stability and weak non-linear theories are used to investigate analytically the Coriolis effect on gravity-driven convection.
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