Convection in Horizontal Temperature Gradients
نویسندگان
چکیده
منابع مشابه
Three-dimensional double-diffusive Marangoni convection in a cubic cavity with horizontal temperature and concentration gradients.
Three-dimensional double-diffusive Marangoni convection in a cubic cavity is studied in the present paper. Both the temperature and solute concentration gradients are applied horizontally. Direct numerical simulations are carried out for surface-tension Reynolds number 10≤Re≤500, surface-tension ratio -2≤R(σ)≤1, and Lewis number 1<Le≤200. Symmetry-breaking pitchfork bifurcation is observed, whi...
متن کاملFluctuations of temperature gradients in turbulent thermal convection.
Broad theoretical arguments are proposed to show, formally, that the magnitude G of the temperature gradients in turbulent thermal convection at high Rayleigh numbers obeys the same advection-diffusion equation that governs the temperature fluctuation T , except that the velocity field in the new equation is substantially smoothed. This smoothed field leads to a -1 scaling of the spectrum of G ...
متن کاملStressed horizontal convection
We consider the problem of a Boussinesq fluid forced by applying both non-uniform temperature and stress at the top surface. On the other boundaries the conditions are thermally insulating and either no-slip or stress-free. The interesting case is when the direction of the steady applied surface stress opposes the sense of the buoyancy driven flow. We obtain two-dimensional numerical solutions ...
متن کاملHorizontal convection is non - turbulent
Consider the problem of horizontal convection: a Boussinesq fluid, forced by applying a non-uniform temperature at its top surface, with all other boundaries insulating. We prove that if the viscosity, ν, and thermal diffusivity, κ, are lowered to zero, with σ ≡ ν/κ fixed, then the energy dissipation per unit mass, ε, also vanishes in this limit. Numerical solutions of the two-dimensional case ...
متن کاملTemperature gradients, and search for non-Boussinesq effects, in the interior of turbulent Rayleigh-Bénard convection
We report temperature measurements for a cylindrical sample of turbulent RayleighBénard convection (RBC) at points in the interior, well away from the thermal boundary layers near the top and bottom of the sample. The aspect ratio was equal to 1.00 and the Prandtl number σ was equal to 4.4 or 5.5. The data are in the range 5× 10 <R< 10, where R is the Rayleigh number. Measurements of the temper...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Geophysical Journal of the Royal Astronomical Society
سال: 2010
ISSN: 0016-8009
DOI: 10.1111/j.1365-246x.1967.tb06261.x