Active control of phase change from supercooled water to ice by ultrasonic vibration 1. Control of freezing temperature

Inada, Takaaki; Zhang, Xu; Yabe, Akira; Kozawa, Yoshiyuki

doi:10.1016/s0017-9310(01)00057-6

Cited by 167 publications

(74 citation statements)

References 14 publications

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“…(iv) A new electric-field-based method to control of the nucleation of ice could improve technological processes as freeze-drying 22 , cryopreservation 23,24 , food manufacture 25 , and cold-energy storage 26 .…”

Section: Introductionmentioning

confidence: 99%

Externally Applied Electric Fields up to 1.6 × 10⁵ V/m Do Not Affect the Homogeneous Nucleation of Ice in Supercooled Water

et al. 2010

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The freezing of water can initiate at electrically-conducting electrodes kept at a high electric potential, or at charged electrically-insulating surfaces. The microscopic mechanisms of these phenomena are unknown, but they must involve interactions between water molecules and electric fields. This paper investigates the effect of uniform electric fields on the homogeneous nucleation of ice in supercooled water. Electric fields were applied across drops of water immersed in a perfluorinated liquid using a parallelplate capacitor; the drops traveled in a microchannel and were supercooled until they froze due to the homogenous nucleation of ice. The distribution of freezing temperatures of drops depended on the rate of nucleation of ice, and the sensitivity of measurements allowed detection of changes by a factor of 1.5 in the rate of nucleation. Sinusoidal alternation of the electric field at frequencies from 3 to 100 kHz prevented free ions present in water from screening the electric field in the bulk of drops. Uniform electric fields in water with amplitudes up to 1.6±0.4×10 5 V/m neither enhanced nor suppressed the homogenous nucleation of ice. Estimations based on thermodynamic models suggest that fields in the range of 10 7 -10 8 V/m might cause an observable increase in the rate of nucleation.3

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Section: Introductionmentioning

confidence: 99%

Externally Applied Electric Fields up to 1.6 × 10⁵ V/m Do Not Affect the Homogeneous Nucleation of Ice in Supercooled Water

et al. 2010

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“…The probability of phase change is increased with the total number of cavitation bubbles, acting as nuclei for solidification inception [31,32]. Conversely, to store warm thermal energy, ultrasound allows a melting time reduction (e.g., to take advantage of the sunlight period) without excessive electricity consumption [10].…”

Section: Melting and Solidificationmentioning

confidence: 99%

Enhancement of Heat Transfer by Ultrasound: Review and Recent Advances

Legay

Gondrexon

Person

et al. 2011

International Journal of Chemical Engineering

293

129

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This paper summarizes some applications of ultrasonic vibrations regarding heat transfer enhancement techniques. Research literature is reviewed, with special attention to examples for which ultrasonic technology was used alongside a conventional heat transfer process in order to enhance it. In several industrial applications, the use of ultrasound is often a way to increase productivity in the process itself, but also to take advantage of various subsequent phenomena. The relevant example brought forward here concerns heat exchangers, where it was found that ultrasound not only increases heat transfer rates, but might also be a solution to fouling reduction.

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“…유발하는 반사성의 단점이 있다 [3,4].이런 문제를 극복하 기 위해 정확한 거리 검출이나 반사파 역시 얼마나 좋은 Matching layer를 사용하는 가에 달려있다 [5,6]. 이 역시 많은 연구가 필요하며 우리가 원하는 환경조건에 적용하 기 위해서는 아주 시급한 상황이다 [7][8][9][10].…”

Section: 서론unclassified

Study on Relation of Optimum Resonant Frequencies between Piezo Ceramic and Matching Layer

김권세¹,

최두석²,

김영춘³

et al. 2013

Journal of the Korea Academia-Industrial cooperation Society

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Ultrasonic transducer is the sensor which is measuring distance. Piezo ceramic of ultrasonic sensor and adhesive technique of matching layer are the most core techniques. With the study of relation on matching layer which takes off the ultrasonic wave into the air, this paper aims to find the second useful frequency as the results which can be changed are extracted in case piezo ceramic and matching layer are bonded. And the experiment is done with piezo ceramic as real piezoelectric element and matching layer of chemical wood. OD of piezo ceramic has designed by  × and OD of matching layer is designed by × with   . Acoustic impedance is generated at the most optimum resonant frequency of 53 Khz. As experimental result, more available frequency can be generated by using the adhesive close to solid than the flexible one.

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Active control of phase change from supercooled water to ice by ultrasonic vibration 1. Control of freezing temperature

Cited by 167 publications

References 14 publications

Externally Applied Electric Fields up to 1.6 × 10⁵ V/m Do Not Affect the Homogeneous Nucleation of Ice in Supercooled Water

Externally Applied Electric Fields up to 1.6 × 10⁵ V/m Do Not Affect the Homogeneous Nucleation of Ice in Supercooled Water

Enhancement of Heat Transfer by Ultrasound: Review and Recent Advances

Study on Relation of Optimum Resonant Frequencies between Piezo Ceramic and Matching Layer

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Active control of phase change from supercooled water to ice by ultrasonic vibration 1. Control of freezing temperature

Cited by 167 publications

References 14 publications

Externally Applied Electric Fields up to 1.6 × 105 V/m Do Not Affect the Homogeneous Nucleation of Ice in Supercooled Water

Externally Applied Electric Fields up to 1.6 × 105 V/m Do Not Affect the Homogeneous Nucleation of Ice in Supercooled Water

Enhancement of Heat Transfer by Ultrasound: Review and Recent Advances

Study on Relation of Optimum Resonant Frequencies between Piezo Ceramic and Matching Layer

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Product

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Externally Applied Electric Fields up to 1.6 × 10⁵ V/m Do Not Affect the Homogeneous Nucleation of Ice in Supercooled Water

Externally Applied Electric Fields up to 1.6 × 10⁵ V/m Do Not Affect the Homogeneous Nucleation of Ice in Supercooled Water