Internal density waves of shock type induced by chemoconvection in miscible reacting liquids
- Авторлар: Bratsun D.1
-
Мекемелер:
- Perm National Research Polytechnic University
- Шығарылым: Том 43, № 10 (2017)
- Беттер: 944-947
- Бөлім: Article
- URL: https://journals.rcsi.science/1063-7850/article/view/206245
- DOI: https://doi.org/10.1134/S1063785017100182
- ID: 206245
Дәйексөз келтіру
Аннотация
A theoretical explanation of the phenomenon of spontaneous emergence of density waves experimentally observed recently in bilayered systems of miscible liquids placed in a narrow vertical gap of the Hele–Shaw cell in the gravitational field is provided. Upper and lower layers represent aqueous solutions of acids and bases, respectively, whose contact leads to the beginning of a neutralization reaction. The process is accompanied by a strong dependence of the reagent’s diffusion coefficients on their concentrations, giving rise to the generation of local density pockets, in which convection develops. The cavities collapse under certain conditions, causing a density jump, which moves faster than typical perturbations in a medium and takes the form of a shock wave. A mathematical model of the phenomenon is proposed, which can be formally reduced to equations of motion of a compressible gas under certain assumptions. Numerical calculations are given and compared with the experimental data.
Авторлар туралы
D. Bratsun
Perm National Research Polytechnic University
Хат алмасуға жауапты Автор.
Email: DABracun@pstu.ru
Ресей, Perm, 614990