Heat transfer and crisis phenomena with intense boiling in the falling wave liquid films

Павленко, А. Н.; Matsekh, Arkadiy; Pecherkin, N. I.; Kneer, Reinhold; Lel, V. V.; Surtaev, Anton

doi:10.1134/s1531869906010096

Cited by 22 publications

(20 citation statements)

References 4 publications

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“…As can be seen from the diagram, there are two areas with different rates of a change in the vapor front velocity, depending on the temperature rise. In the area of low overheating, the growth rate of the front velocity vs. wall superheat is satisfactorily described through the calculation by the model [5]. In the area of high overheating, the significantly higher growth rate of the front velocity vs. wall overheating is observed.…”

Section: Resultsmentioning

confidence: 57%

“…Usual water and organic, cryogenic liquids, and liquid mixtures and solutions are usually used as the working liquids [3,4]. Limiting the intensity of heat removal is caused by formation of a vapor film near the heat transfer surface and, in particular, it is determined by the dynamics of this film propagation along the heating surface [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of Evaporation Front Propagation in Freon R21 With Addition of Nanoparticles

2016

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Abstract. The paper presents the results of an experimental study on propagation dynamics of the self-sustained evaporation front in a large volume of Freon-R21 with the addition of SiO 2 nanoparticles. The experimental data on propagation velocity and structure of evaporation fronts were obtained; the spectral analysis of fluctuations of the evaporation front interface was carried out. The characteristic frequencies and amplitudes of interface fluctuations were determined depending on the velocity of evaporation front propagation. It was shown that the addition of nano-sized particles significantly affects the front velocity and character of interface fluctuations.

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Section: Resultsmentioning

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Dynamics of Evaporation Front Propagation in Freon R21 With Addition of Nanoparticles

2016

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“…The stronger dependence of the front velocity wall on wall overheating in the area of ΔT > 60 K indicates the intensification of evaporation at the interface. In [7] this intensification of evaporation is explained by development of Landau instability [9]. Considerable variation of instantaneous velocity at the constant values of wall overheating relates to pulsations of interface velocity.…”

Section: Resultsmentioning

confidence: 99%

“…This effect can be shown both in the systems of film and droplet irrigation [1][2][3], and under the conditions of a large volume [4]. There are a number of models describing distribution of the self-sustained undisturbed evaporation front [5,6], as well as the single attempts to model the dynamics of front propagation with consideration of small-scale interface perturbations the under conditions of intense evaporation [7].…”

Section: Introductionmentioning

confidence: 99%

Studying the development of evaporation front interface in Freon R21 at non-stationary heat release

Кузнецов

Moiseev

Жуков

2015

MATEC Web of Conferences

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Abstract. The work is aimed at investigation of dynamic and structural characteristics of the self-sustained evaporation front in freon R21 under the conditions of free convection. The results demonstrate the presence of two typical zones in the diagram of dependence of front propagation velocity on heating surface overheating. Formation of small-scaled fast growing disturbances was detected at the interface. The diagram of stability of evaporation front interface, built by the Landau theory, was proposed. The obtained experimental data were analyzed from the standpoint of instability development at intense evaporation. It is shown that development of interface instability for perturbation scales of about layer thickness corresponds to the area of more intense evaporation.

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“…Models proposed previously [1,[5][6][7][8][9] aimed at approximate description of the dependence of evaporation front propagation velocity on some set of physical parameters. Some of these models [5,7,9] suggest that a "frontal stagnation point" exists at the interface. However, some recent experimental data did not confirm the existence of the frontal stagnation point [2], which implies the need for developing a new approach to the description of these phenomena.…”

Section: Introductionmentioning

confidence: 99%

On the shape of self-sustained evaporation front in a metastable liquid

Шарыпов

Krasinsky

2017

MATEC Web Conf.

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Abstract.A theoretical model which takes into account new experimental data is proposed for the description of a stationary surface of the selfsustained evaporation front propagating in a layer of superheated liquid flowing over a flat heater. An approximate analytical dependence of the vapour layer thickness on the coordinate and physical parameters is obtained and found to satisfactorily agree with the experimental results. A dimensional parameter is introduced that allows the description to be presented in an invariant dimensionless form.

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Heat transfer and crisis phenomena with intense boiling in the falling wave liquid films

Cited by 22 publications

References 4 publications

Dynamics of Evaporation Front Propagation in Freon R21 With Addition of Nanoparticles

Dynamics of Evaporation Front Propagation in Freon R21 With Addition of Nanoparticles

Studying the development of evaporation front interface in Freon R21 at non-stationary heat release

On the shape of self-sustained evaporation front in a metastable liquid

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