Evaporation of liquid under acoustic-vacuum exposure

https://doi.org/10.1016/j.csite.2021.101679Get rights and content
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Highlights

  • The optimization of parameters of acoustic-vacuum exposure on liquid evaporation.

  • A physical experiment to optimize the evaporation process of a liquid.

  • A comparison of numerical and experimental research results.

Abstract

The theory of optimal control used is based on the Pontryagin maximum principle under the acoustic-vacuum exposure affecting the liquid evaporation process in an experimental container. Evaporation energy consumption for a given liquid mass is taken as an optimality criterion. The physical and mathematical model of a liquid layer with formed vapor bubbles under acoustic-vacuum exposure is based on the use of a pendulum model. A physical model of the liquid evaporation process under acoustic-vacuum exposure is developed and experimental investigations are carried out. An optimal cyclogram of acoustic-vacuum exposure is obtained, at which the energy consumption for evaporation of a given mass of liquid decreases by 2.5 times in comparison with a given cyclogram of acoustic-vacuum exposure. The obtained experimental results demonstrate close coincidence with the theoretical results, the maximum discrepancy being below 9%.

Keywords

Evaporation
Liquid
Steam bubbles
Acoustic-vacuum exposure
Pontryagin maximum principle

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