Mezulis, Ansis; Blums, Elmars The presence of microconvective instability in optically induced gratings. (English) Zbl 1130.80003 J. Non-Equilibrium Thermodyn. 32, No. 3, 331-340 (2007). Summary: In the present work, attention is paid to some significant effects (phenomena) in forced Rayleigh scattering (FRS) experiments with an applied magnetic field, \(\nabla T\parallel{\mathbf H}\), which have not been analyzed before. The work deals with the idea that the experimentally observed effects are caused by microconvection. The dimensionless numbers \(Cm\) and \(Rm\), which are responsible for the onset of microconvection, are calculated from experiments as well as from the linear stability analysis in a Hele-Shaw approximation. The problem of definition of the true values of diffusion and Soret coefficients from experiments and their field dependence, which are not affected by the assumed microconvection, is solved by original data processing. MSC: 80-05 Experimental work for problems pertaining to classical thermodynamics 80A20 Heat and mass transfer, heat flow (MSC2010) 78A45 Diffraction, scattering 76D27 Other free boundary flows; Hele-Shaw flows 76R50 Diffusion Keywords:Rayleigh scattering; microconvection;Hele-Shaw approximation; Soret coefficients PDFBibTeX XMLCite \textit{A. Mezulis} and \textit{E. Blums}, J. Non-Equilibrium Thermodyn. 32, No. 3, 331--340 (2007; Zbl 1130.80003) Full Text: DOI References: [1] Demouchy G., J. Appl. Phys. 37 pp 1– (2004) [2] Igonin M., J. Magnetohydrodynamics 37 pp 53– (2001) [3] Cebers A., J. Magnetohydrodynamics 38 pp 265– (2002) [4] DOI: 10.1103/PhysRevLett.74.5032 [5] DOI: 10.1103/PhysRevE.52.3936 [6] Blums E., Progress in Engineering Heat Transfer 247 pp 947– (1999) This reference list is based on information provided by the publisher or from digital mathematics libraries. Its items are heuristically matched to zbMATH identifiers and may contain data conversion errors. In some cases that data have been complemented/enhanced by data from zbMATH Open. This attempts to reflect the references listed in the original paper as accurately as possible without claiming completeness or a perfect matching.