Novel criteria for the development of monotonic and oscillatory instabilities in a two-layer film
| Autor: | I. B. Simanovskii, A. A. Nepomnyashchy |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics Convection Mechanical Engineering Computational Mechanics Thermodynamics Pattern formation Monotonic function 02 engineering and technology Mechanics Heat sink 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Instability 010305 fluids & plasmas Physics::Fluid Dynamics Temperature gradient Nonlinear system Transverse plane Mechanics of Materials 0103 physical sciences 0210 nano-technology |
| Zdroj: | Physics of Fluids. 29:092104 |
| ISSN: | 1089-7666 1070-6631 |
| DOI: | 10.1063/1.5001729 |
| Popis: | The development of the Marangoni instability in a two-layer film in the presence of a transverse temperature gradient and a heat source/sink at the liquid-liquid interface is investigated. The problem is solved by means of a linear stability theory and nonlinear simulations. Novel criteria for the development of monotonic and oscillatory instabilities have been formulated. It has been found that the nonlinear development of a monotonic instability leads to a rupture of the bottom layer or the top layer. Numerous types of nonlinear film evolution have been observed in the case of an oscillatory instability, among them alternating roll patterns of different scales and orientations, temporally non-periodic motions, and the rupture of either layer. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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