Results 11 to 20 of about 67,930 (246)
Thermal Convection for Large Prandtl Numbers [PDF]
Physical Review Letters, 2001 The Rayleigh-Benard theory by Grossmann and Lohse [J. Fluid Mech. 407, 27 (2000)] is extended towards very large Prandtl numbers Pr. The Nusselt number Nu is found here to be independent of Pr. However, for fixed Rayleigh numbers Ra> 10^{10} a maximum around Pr= 2 in the Nu(Pr)-dependence is predicted which is absent for lower Ra.
Grossmann, Siegfried, Lohse, Detlef
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Hydromagnetic dynamos at the low Ekman and magnetic Prandtl numbers
Contributions to Geophysics and Geodesy, 2016 Hydromagnetic dynamos are numerically investigated at low Prandtl, Ekman and magnetic Prandtl numbers using the PARODY dynamo code. In all the investigated cases, the generated magnetic fields are dominantly-dipolar.
Ján ŠIMKANIN
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Contributions to Geophysics and Geodesy, 2017 Numerical simulations of the geodynamo are becoming more realistic because of advances in computer technology. Here, the geodynamo model is investigated numerically at the extremely low Ekman and magnetic Prandtl numbers using the PARODY dynamo code ...
Ján ŠIMKANIN, Juraj KYSELICA
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Prandtl-number dependence of convection-driven dynamos in rotating spherical fluid shells [PDF]
, 2005 The value of the Prandtl number P exerts a strong influence on convection-driven dynamos in rotating spherical shells filled with electrically conducting fluids.
Busse, F.H., Simitev, R.
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Fluids, 2023 In rotating Rayleigh–Bénard problems, convection with traveling waves may occur near the sidewalls. The Rayleigh number, Taylor number and Prandtl number are involved in this phenomenon, and the convection mode is determined depending on their values. We
Toshio Tagawa
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Low magnetic Prandtl number dynamos with helical forcing [PDF]
, 2005 We present direct numerical simulations of dynamo action in a forced Roberts flow. The behavior of the dynamo is followed as the mechanical Reynolds number is increased, starting from the laminar case until a turbulent regime is reached.
C. Canuto +5 more
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Boundary layer structure in turbulent thermal convection and its consequences for the required numerical resolution [PDF]
, 2010 Results on the Prandtl-Blasius type kinetic and thermal boundary layer thicknesses in turbulent Rayleigh-B\'enard convection in a broad range of Prandtl numbers are presented.
Blasius H +14 more
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Method of calculation of turbulent Prandtl number for the SST turbulence model
St. Petersburg Polytechnical University Journal: Physics and Mathematics, 2019 We present a new model for turbulent Prandtl number that provides an improvement of prediction capabilities of the SST turbulence model in application to wall heat transfer problems. The model developed gives an explicit expression for the local value of
Zaitsev Dmitri, Smirnov Evgeny
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Magnetic Field Amplification by Small-Scale Dynamo Action: Dependence on Turbulence Models and Reynolds and Prandtl Numbers [PDF]
, 2012 The small-scale dynamo is a process by which turbulent kinetic energy is converted into magnetic energy, and thus is expected to depend crucially on the nature of turbulence.
A. Kolmogorov +15 more
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The Dependence of Dynamo $\alpha$-Effect on Reynolds Numbers, Magnetic Prandtl Number, and the Statistics of MHD Turbulence [PDF]
, 2001 We generalize the derivation of dynamo coefficient $\alpha$ of Field et al (1999) to include the following two aspects: first, the de-correlation times of velocity field and magnetic field are different; second, the magnetic Prandtl number can be ...
Gruzinov A. +8 more
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