Equation of motion of an expanding vapour drop in an immiscible liquid medium

Selecki, A.; Gradoń, Leon

doi:10.1016/0017-9310(76)90204-0

Cited by 24 publications

(10 citation statements)

References 7 publications

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“…It consisted of a single vapor bubble beneath which was suspended a puddle of the vaporizing liquid. Such two-phase droplets have been observed by others [e.g., [18][19][20]. In our present application, the initial bubbles were believed to form by homogeneous nucleation (section 3.2) and not as a result of any pre-existing gas bubbles or dissolved gases in the liquid.…”

Section: Hil/ / ^---\--^^supporting

confidence: 73%

Effect of Pressure on Bubble Growth Within Liquid Droplets at the Superheat Limit

Avedisian

1982

Journal of Heat Transfer

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A study of high-pressure bubble growth within liquid droplets heated to their limits of superheat is reported. Droplets of an organic liquid (n-octane) were heated in an immiscible nonvolatile field liquid (glycerine) until they began to boil. High-speed cine photography was used for recording the qualitative aspects of boiling intensity and for obtaining some basic bubble growth data which have not been previously reported. The intensity of droplet boiling was found to be strongly dependent on ambient pressure. At atmospheric pressure the droplets boiled in a comparatively violent manner. At higher pressures photographic evidence revealed a two-phase droplet configuration consisting of an expanding vapor bubble beneath which was suspended a pool of the vaporizing liquid. A qualitative theory for growth of the two-phase droplet was based on assuming that heat for vaporizing the volatile liquid was transferred across a thin thermal boundary layer surrounding the vapor bubble. Measured droplet radii were found to be in relatively good agreement with predicted radii.

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Section: Hil/ / ^---\--^^supporting

confidence: 73%

Effect of Pressure on Bubble Growth Within Liquid Droplets at the Superheat Limit

Avedisian

1982

Journal of Heat Transfer

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“…For this particular case t 0 =0.25 and S o = 0.02 m. These values were obtained from Fig. 3 of Selecki and Gradon [2].…”

Section: The Equation Of Motionmentioning

confidence: 88%

“…The travel distance becomes for the same previous initial conditions (31) This equation was compared with the experimental data of Selecki and Gradon [2] in Fig. 5.…”

Section: The Equation Of Motionmentioning

confidence: 97%

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The Fluid Dynamics of Rising and Evaporating Droplet in an Immiscible Liquid

Kendoush¹

2021

Proceedings of the 2nd International Conference on Fluid Flow and Thermal Science (ICFFTS'21)

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“…where C~ is the surface tension at the bubble surrounding liquid boundary. Selecki and Gradon (1976) Substituting the value of CD from Eq. 7 in Eq.…”

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confidence: 99%

Direct contact heat transfer with phase change: Motion of evaporating droplets

Raina¹,

Wanchoo²,

Grover³

1984

AIChE Journal

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Direct contact heat transfer between liquids has the advantage of eliminating metallic heat transfer surfaces which are prone to corrosion and fouling. In addition, if phase change occurs, a larger heat capacity for heat absorption is available. The mechanism of heat transfer between two immiscible phases and dynamics of a vaporizing drop are, relatively, more complex than either that of a drop or a bubble of constant radius.As reported by Sideman and Taital(1964), Simpson et al. (1974), and Sambi (1981), a dispersed liquid droplet changes its shape from spherical through ellipsoidal to a capshaped bubble diiring the course of evaporation through continuous immiscible liquid medium. In addition to these changes in shape, the two-phase bubble oscillates causing the unevaporated dispersed liquid in the twophase bubble to slosh from side to side. The combined effect of irregular transformation in the shape of the two-phase bubble, sloshing of the unevaporated liquid in the two-phase bubble, and its zigzag trajectory has complicated the study of the mechanism of heat transfer and dynamics of a vaporizing drop.As far as theoretical expressions for heat transfer involved, motion of the evaporating two-phase bubble, and the total time of its evaporation are concerned, the complicated nature of the problem has stood in the way of workers in developing suitable models that could represent the experimental data.In pursuit of such a study, a mathematical model for the heat transfer coefficient has already been developed (Raina and Grover, 1982). This paper deals with the motion of the vaporizing two-phase bubble.Based on the results of their experimental studies of the motion of expanding bubbles, Sideman and Taitel(l964) developed the following empirical formula for the pentane-water system describing the relationship between the position of the bubble and time. H = Ho + BtP or Quantitative description of the behavior of single bubble and drop dispersions in continuous fluid is of ten based on the descrip-

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Equation of motion of an expanding vapour drop in an immiscible liquid medium

Cited by 24 publications

References 7 publications

Effect of Pressure on Bubble Growth Within Liquid Droplets at the Superheat Limit

Effect of Pressure on Bubble Growth Within Liquid Droplets at the Superheat Limit

The Fluid Dynamics of Rising and Evaporating Droplet in an Immiscible Liquid

Direct contact heat transfer with phase change: Motion of evaporating droplets

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