Numerical simulation of the genesis of superhighway convection in a slightly inclined layer of a binary liquid mixture
نویسندگان
چکیده
The dynamics of mixtures with a positive value of the Soret coefficient without inclination has essentially been studied in laboratory experiments [1, 2, 3], and numerical simulations reduce to periodic domains [4, 5]. According to these studies, close to convective onset, the motion is dominated by the solute gradient, and a stationary square pattern with negligible change in heat transport is reached (Soret regime). Far from threshold, convection selects the usual roll structure observed in pure fluid convection, where a strong change in heat transport takes place. In the crossover region, a cross roll regime is observed and the competition between square and roll patterns leads to oscillations.
منابع مشابه
Numerical simulation of mixed convection heat transfer of nanofluid in an inclined enclosure by applying LBM
Mixed convection of Cu-Water nanofluid is studied numerically in a shallow inclined enclosure by applying lattice Boltzmann method. The D2Q9 lattice and internal energy distribution function based on the BGK collision operator are used in order to develop the thermal flow field. The enclosure's hot lid has the constant velocity of U0 while its cold lower wall has no motion. Moreover, sidewalls ...
متن کاملCombined mixed convection and radiation simulation of inclined lid driven cavity
This paper presents a numerical investigation of the laminar mixed convection flow of a radiating gas in an inclined lid-driven cavity. The fluid is treated as a gray, absorbing, emitting, and scattering medium. The governing differential equations including continuity, momentum and energy are solved numerically by the computational fluid dynamics techniques (CFD) to obtain the velocity and tem...
متن کاملNumerical simulation of Al2O3–water nanofluid mixed convection in an inclined annulus
Laminar mixed convection of Aluminium oxide (Al2O3)–water nanofluid flow in an inclined annulus using a single-phase approach was numerically studied. Constant heat flux boundary conditions were applied on the inner and outer walls. All the thermophysical properties of nanofluid, such as, viscosity, heat capacity, thermal conductivity, and thermal expansion coefficient...
متن کاملNumerical simulation of Al2O3–water nanofluid mixed convection in an inclined annulus
Laminar mixed convection of Aluminium oxide (Al2O3)–water nanofluid flow in an inclined annulus using a single-phase approach was numerically studied. Constant heat flux boundary conditions were applied on the inner and outer walls. All the thermophysical properties of nanofluid, such as, viscosity, heat capacity, thermal conductivity, and thermal expansion coefficient, except density in the bo...
متن کاملEffect of a marginal inclination on pattern formation in a binary liquid mixture under thermal stress.
Convective motions in a fluid layer are affected by its orientation with respect to the gravitational field. We investigate the long-term stability of a thermally stressed layer of a binary liquid mixture and show that pattern formation is strongly affected by marginal inclinations as small as a few milliradians. At small Rayleigh numbers, the mass transfer is dominated by the induced large sca...
متن کامل