Acoustic field interaction with a boiling system under terrestrial gravity and microgravity

Sitter, J.S.; Snyder, Trevor; Chung, J.N.; Marston, Philip L.

doi:10.1121/1.423910

Cited by 29 publications

(14 citation statements)

References 22 publications

(22 reference statements)

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“…This feature may have implications for the enhancement of boiling heat transfer by acoustical means. [9][10][11][12][13] It would seem that, by adjusting the frequency so that R r is close to the size at which the bubbles detach from the heated surface, a faster growth/ detachment bubble cycle can be induced with an attendant increase in heat transfer.…”

Section: Discussionmentioning

confidence: 99%

The dynamics of vapor bubbles in acoustic pressure fields

Prosperetti

1999

Physics of Fluids

139

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In spite of a superficial similarity with gas bubbles, the intimate coupling between dynamical and thermal processes confers to oscillating vapor bubbles some unique characteristics. This paper examines numerically the validity of some asymptotic-theory predictions such as the existence of two resonant radii and a limit size for a given sound amplitude and frequency. It is found that a small vapor bubble in a sound field of sufficient amplitude grows quickly through resonance and continues to grow thereafter at a very slow rate, seemingly indefinitely. Resonance phenomena therefore play a role for a few cycles at most, and reaching a limit size-if one exists at all-is found to require far more than several tens of thousands of cycles. It is also found that some small bubbles may grow or collapse depending on the phase of the sound field. The model accounts in detail for the thermo-fluid-mechanic processes in the vapor. In the second part of the paper, an approximate formulation valid for bubbles small with respect to the thermal penetration length in the vapor is derived and its accuracy examined. The present findings have implications for acoustically enhanced boiling heat transfer and other special applications such as boiling in microgravity.

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Section: Discussionmentioning

confidence: 99%

The dynamics of vapor bubbles in acoustic pressure fields

Prosperetti

1999

Physics of Fluids

139

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“…Sitter et al [12] studied the effect of acoustic fields during nucleate boiling on a 0.25 mm-dia. platinum wire in FC-72 using a 2.1 s drop tower.…”

Section: Literature Reviewmentioning

confidence: 99%

Dynamics of discrete bubble in nucleate pool boiling on thin wires in microgravity

2009

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A space experiment on bubble behavior and heat transfer in subcooled pool boiling phenomenon has been performed utilizing the temperature-controlled pool boiling (TCPB) device both in normal gravity in the laboratory and in microgravity aboard the 22 nd Chinese recoverable satellite. The fluid is degassed R113 at 0.1 MPa and subcooled by 26℃ nominally. A thin platinum wire of 60 μm in diameter and 30 mm in length is simultaneously used as heater and thermometer. Only the dynamics of the vapor bubbles, particularly the lateral motion and the departure of discrete vapor bubbles in nucleate pool boiling are reported and analyzed in the present paper. It's found that these distinct behaviors can be explained by the Marangoni convection in the liquid surrounding vapor bubbles. The origin of the Marangoni effect is also discussed.

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“…Modest degradation was found and the bubbles kept on detaching even at high heat flux from the scale wire. Sitter et al (1998) studied the effect of acoustic fields during nucleate boiling on a 0.25 mm-dia. platinum wire in FC-72 using a 2.1s drop tower.…”

Section: Introductionmentioning

confidence: 99%