Oscillatory and monotonous instability at the boundary of the transition 'molecular diffusion-concentration convection' in ternary gas mixtures / Kosov V.N., Seleznev V.D., Zhavrin Yu.I. // Inzhenerno-Fizicheskii Zhurnal. - 2000. - V. 73, l. 2. - P. 313-320.
ISSN:
00210285
Type:
Article
Abstract:
It is shown by a linear analysis for stability that for partial Rayleigh numbers R1 and R2 that have different signs, there exist two anomalous regions with monotonous (R1 < 0 ), R2 > 0) and oscillatory (R1 > 0, R2 < 0) instability where the density at the bottom is higher than at the top. The experimental data obtained confirm the presence of these two regions of instability, and the position of the stability boundaries is well described by the given theory for mixtures with a linear distribution of the concentration. For systems with a pronounced nonlinearity in the distribution of the concentrations, agreement between theory and experiment is violated.