On the Marangoni Instability in Gas Absorption

2014 International Conference on Science & Engineering in Mathematics, Chemistry and Physics

数学;化学;物理学

Poroyko, T.A.^1 ; Skurygin, E.F.^1

Yaroslavl State Technical University, Yaroslavl, Russia^1

关键词: Absorption process;    Absorption rates;    Capillary instability;    Liquid velocities;    Marangoni instabilities;    Non steady-state;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/495/1/012033/pdf
DOI  :  10.1088/1742-6596/495/1/012033

来源: IOP

【 摘 要 】

The non-steady-state process of a gas absorption by initially motionless liquid is investigated. Nonlinear analysis of the thermo-capillary instability showed that the transition of the process to unstable convective regime is determined by two sharply different characteristic times. First one is the time of neutral perturbations, when the fluctuations of the concentration of absorbable substance, temperature and the liquid velocity stop decrease and begin to grow together, but their intensity is too small to influence on the absorption rate. The second one is the time much greater than the first, when the perturbations reach sufficient values, and the absorption process turns to the convective regime. The results obtained explain the well-known experimental data on delaying of the transition of the absorption process to the unstable convective regime.