We present an experimental investigation of Rayleigh-Bénard convection in binary-gas mixtures. In order to interpret the results quantitatively, we determined the necessary thermodynamic and transport properties for six mixtures ~He-CO2, He-SF6, He-Xe, Ne-Ar, Ar-CO2, and H2-Xe! by a combination of data from the literature, molecular-theory calculations, and thermal-conductivity measurements. Al...

In this Letter, we consider a liquid mixture confined between two thermally conducting walls subjected to a stationary temperature gradient. While in a one-component liquid nonequilibrium fluctuation forces appear inside the liquid layer, nonequilibrium fluctuations in a mixture induce a Casimir-like force on the walls. The physical reason is that the temperature gradient induces large concentr...

‘5”., By S RGIo DE CARVALHO T HIS PAPER PRESENTS some results of the absorption microspectroscopy of bone marrow cells in two main wave lengths: 4150 A (violet region in the Soret band) and 2650 A (UV). The first wave length is indicative of heme structures in appreciable concentration in cells.” 2 As these are only achieved as Hb, the Soret hand absorption microspectroscopy becomes specific fo...

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...

We have numerically investigated Rayleigh-Bénard convection in binary mixtures assuming a thermal diffusion ratio that depends on the local temperature and changes its sign within the cell. The stationary instability has been found to precede the oscillatory one for a wide range of negative mean psi values. The bifurcation diagram for stationary rolls turns out to be qualitatively different fro...

This study focused on the analysis of two-dimensional incompressible magnetohydrodynamic Carreau nanofluid flow across a stretching cylinder containing microorganisms with impacts chemical reactions and multiple slip boundary conditions. Moreover, main objective is concerned enhancement thermal transportation effect heat source bioconvection. By assigning pertinent similarity transitions to gov...

This developing study is focused on mass diffusion and thermal energy enhancement in Reiner–Philippoff martial across a vertical-surface under an exposed Lorentz force. Characterization of the are modified utilizing non-Fourier’s theory presence heat source. Three types nanoparticles — Al 2 O 3 , titanium dioxide, TiO engine oil inserted for production energy. Darcy’s Forchheimer used to analyz...

Convective heat transfer using different nanofluid types is investigated. The domain is differentially heated and nanofluids are treated as heterogeneous mixtures with weak solutal diffusivity and possible Soret separation. Owing to the pronounced Soret effect of these materials in combination with a considerable solutal expansion, the resulting solutal buoyancy forces could be significant and ...