An open oscillatory heat pipe water pump

Dobson, Robert T.

doi:10.1016/j.applthermaleng.2004.07.005

Cited by 35 publications

(27 citation statements)

References 4 publications

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“…4) is similar to the works presented earlier in [11,12]. The liquid plug confines a vapor bubble is constant and assumed to be equal to the sum of the reservoir pressure p r and the hydrostatic pressure of the liquid column in the reservoir.…”

Section: Model Geometrymentioning

confidence: 73%

“…Within several details, it is analogous to the single-bubble version of the model presented in [13]. By the reasons mentioned above, this model is also similar to that of Dobson [11,12] (at least it coincides with it in the linear approximation treated below).…”

Section: Superheated Vapor Modelmentioning

confidence: 77%

“…The heat exchange terms come from evaporation/condensation heat exchange, see [11][12][13]. These terms are equivalent to those of the sensible heat exchange of the gas with the tube walls.…”

Section: Superheated Vapor Modelmentioning

confidence: 99%

“…This effect was completely neglected in the above mentioned modelling approaches. Dobson [11,12] has included a film in his singlebubble model. However the film mass exchange in his model was not related to the liquid-vapor equilibrium and the mass exchange was proportional to the difference of temperatures of the vapor and the wall, just like in the other works that did not treat the films at all.…”

Section: Introductionmentioning

confidence: 99%

“…Zhang et al [10], Dobson [11,12] studied the governing mechanism of the PHP using simple models. They studied a Ushaped miniature tube (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Thermally induced two-phase oscillating flow inside a capillary tube

Das

Nikolayev

Lefèvre

et al. 2010

International Journal of Heat and Mass Transfer

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a b s t r a c tThis paper deals with thermally induced meniscus oscillations in a two-phase system consisting of a liquid plug and a vapor bubble in a capillary tube of circular cross-section. This system represents the simplest version of a heat transfer device called ''pulsating heat pipe" (PHP). Our purpose is to gain fundamental understanding of the physical processes that cause self-sustained thermally driven oscillations. A visualization experiment is performed and the oscillations of the liquid-vapor meniscus and the vapor pressure are observed. We propose next a theoretical model. It differs from existing models by the account of the two-phase equilibrium that occurs locally at the vapor-liquid interface and by introduction of the time varying wetting films through which the major part of the heat and mass transfer occurs.Results from the proposed model show a good agreement with the experiment.

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Section: Model Geometrymentioning

confidence: 73%

Section: Superheated Vapor Modelmentioning

confidence: 77%

Section: Superheated Vapor Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Zhang et al [10], Dobson [11,12] studied the governing mechanism of the PHP using simple models. They studied a Ushaped miniature tube (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Thermally induced two-phase oscillating flow inside a capillary tube

Das

Nikolayev

Lefèvre

et al. 2010

International Journal of Heat and Mass Transfer

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show abstract

What limits the oscillations’ amplitude in the single-branch pulsating heat pipe

2022

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Experimental evidences of distinct heat transfer regimes in pulsating heat pipes (PHP)

Lips¹,

Bensalem²,

Bertin³

et al. 2010

Applied Thermal Engineering

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Various experiments were conducted on two full-size Pulsating Heat Pipes (PHP) which differed from their diameter, number of turns, and working fluid. The analysis of the experimental results showed two kind of operating curves (overall thermal resistance vs. heat rate): for low heat fluxes, the curve is irregular and the PHP performance is sensitive to the orientation. For high heat fluxes, the operating curve is smooth and independent from the orientation. To contribute to the analysis of these results, experiments were conducted at the ACCEPTED MANUSCRIPT 2 scale of a single branch of a PHP. An oscillating motion was imposed to a single liquid plug surrounded by two vapour slugs in a capillary tube and high speed visualisations were performed. The test section was either adiabatic or heated. The adiabatic experiments brought to the fore the importance of dynamic contact angles in the flow and the dissymmetry between the advancing and receding contact angle. The non-adiabatic experiments showed that at low flux, the flow is disturbed by bubble nucleation, while at high heat flux, the main heat transfer mechanism is thin film evaporation, with a completely different thermal and hydrodynamic behaviour.

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An open oscillatory heat pipe water pump

Cited by 35 publications

References 4 publications

Thermally induced two-phase oscillating flow inside a capillary tube

Thermally induced two-phase oscillating flow inside a capillary tube

What limits the oscillations’ amplitude in the single-branch pulsating heat pipe

Experimental evidences of distinct heat transfer regimes in pulsating heat pipes (PHP)

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