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Rectified heat transfer into translating and pulsating vapor bubbles
1Department of Mechanical Engineering, The Johns Hopkins University, Baltimore, Maryland 21218, USA.
The Journal of the Acoustical Society of America
|November 15, 2002
Summary
Translating vapor bubbles in subcooled liquids grow faster due to convection. This effect, influenced by temperature, can be used for bubble management and accelerated growth.
Area of Science:
- Thermodynamics
- Fluid Dynamics
- Acoustics
Background:
- Stationary vapor bubbles grow in subcooled liquids via rectified heat transfer under intense acoustic fields.
- The influence of bubble translation and convection on this growth process is not well understood.
Purpose of the Study:
- To investigate how bubble translation and convective effects influence growth by rectified heat transfer in subcooled liquids.
- To determine the impact of initial temperature distribution and other factors on bubble behavior.
Main Methods:
- Theoretical analysis of bubble dynamics under acoustic fields and translation.
- Numerical simulations to model heat transfer and fluid flow around the translating bubble.
Main Results:
- Convection can destabilize the bubble or accelerate its growth, depending on initial conditions.
- Significant effects are observed within practically relevant parameter ranges.
- In saturated or superheated liquids, convection enhances bubble growth accelerated by translatory motion.
Conclusions:
- Translatory motion significantly impacts vapor bubble growth dynamics in acoustic fields.
- The findings offer potential for controlled bubble management, such as enhanced condensation or accelerated growth and coalescence.
- Understanding these phenomena is crucial for applications involving boiling and bubble behavior.