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Traveling-wave convection in a binary fluid mixture under high-frequency vertical vibrations
B L Smorodin1, B I Myznikova2, S M Ishutov1
1Department of Physics of Phase Transitions, Perm State University, 15 Bukirev Street, 614990 Perm, Russia.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|October 30, 2014
Summary
High-frequency vibrations and Soret coupling influence convective rolls in fluid layers. Researchers identified stable traveling and modulated traveling waves, revealing complex fluid dynamics under specific conditions.
Area of Science:
- Fluid Dynamics
- Nonlinear Dynamics
- Heat and Mass Transfer
Background:
- Convective stability is crucial in various natural and industrial processes.
- High-frequency vibrations can significantly alter fluid behavior.
- Soret coupling introduces complex interactions between temperature and concentration gradients.
Purpose of the Study:
- To numerically investigate convective stability thresholds.
- To analyze the nonlinear spatiotemporal evolution of convective rolls.
- To understand the impact of vibrations and Soret coupling on fluid patterns.
Main Methods:
- Numerical simulations of a plane horizontal layer with rigid boundaries.
- Parameterization based on laboratory experiments with ethanol-water mixture.
- Utilizing temporal Fourier decomposition and diagnostic tools.
Main Results:
- Identified convective stability thresholds and nonlinear evolution of convective rolls.
- Observed stable weakly nonlinear traveling waves and modulated traveling waves.
- Characterized pattern formation based on heat and vibration intensities.
Conclusions:
- High-frequency vibrations and Soret coupling lead to complex bifurcations and spatiotemporal dynamics.
- Stable wave patterns emerge within specific parameter domains.
- The interplay of vibrations, Soret gradients, and mixing dictates fluid behavior.
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