Film Boiling Heat Transfer from a Horizontal Circular Plate Facing Downward

Shigechi, Toru; Kawae, Nobuji; Tokita, Yuji; Yamada, Takashi

doi:10.1299/jsmeb1988.32.4_646

Cited by 5 publications

(6 citation statements)

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“…They found that the vapor film had a minimum thickness at the plate center and then increased along the radial distance. This result, however, clearly contradicts visual observations and, therefore, as pointed out by Shigechi and colleagues [5], the radial momentum equation derived by Farahat and Madbouly is open to question. In addition to the finite difference method, boundary-layer integral methods have been utilized by many researchers.…”

Section: Heat Transfer-asian Research 32 (1) 2003mentioning

confidence: 54%

“…In addition to the finite difference method, boundary-layer integral methods have been utilized by many researchers. Nishio and colleagues [6] developed a one-equation boundary-layer integral method, where only the vapor film thickness δ is treated as unknown, while Shigechi and colleagues [5,7] proposed a two-equation boundary-layer integral method and derived the governing equations for the vapor film thickness δ and representative radial velocity u x . These authors have succeeded in deriving analytical heat transfer correlations that reproduce the experimental heat transfer coefficients obtained by Nishio's group [6] quite satisfactorily.…”

Section: Heat Transfer-asian Research 32 (1) 2003mentioning

confidence: 99%

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Film boiling heat transfer from a horizontal circular plate facing downward

Walujastono

Kamiuto

2002

Heat Trans. Asian Res.

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The two-dimensional, steady, pool film boiling heat transfer from a horizontal circular plate facing downward to a stagnant saturated liquid is studied theoretically. It is assumed that the vapor-liquid interface is smooth and that radiation can be disregarded. The relevant governing equations for the vapor film are solved for saturated water at atmospheric pressure using an improved two-equation boundarylayer integral method. It is shown that the dimensionless temperature profile is affected by the wall superheat ∆T sat and that the ratio of Nu to X 0.2 is an increasing function of ∆T sat . Here, Nu represents the mean Nusselt number and X the film-boiling Rayleigh number. In addition, it is revealed that the one-equation boundary-layer integral method developed by Nishio and colleagues is fairly accurate in predicting the film thickness, the representative radial velocity, and the mean Nusselt number.

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Section: Heat Transfer-asian Research 32 (1) 2003mentioning

confidence: 54%

Section: Heat Transfer-asian Research 32 (1) 2003mentioning

confidence: 99%

Film boiling heat transfer from a horizontal circular plate facing downward

Walujastono

Kamiuto

2002

Heat Trans. Asian Res.

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“…The authors [8][9][10] have analyzed two-dimensional, steady-state, laminar film boiling heat transfer from a downward-facing horizontal plate by assuming that the vapor flow beneath the heated plate of a finite size was driven by a hydrostatic pressure gradient due to the change in the thickness of the vapor film. The resulting boundary layer equations for the vapor flower solved by an integral method, taking into account the effect of the plate edge and the contribution of radiation heat transfer.…”

Section: Saturated Film Boiling Heat Transfermentioning

confidence: 99%

“…For subcooled liquids, experimental data have been obtained by Nishio and colleagues [5] under steady-state conditions and by Yamada and colleagues [7] using a quenching method. Thus, the present authors [8][9][10][11] have analyzed the film boiling heat transfer from finite-size horizontal plates facing downward and examined a method to effectively correlate the experimental data recently obtained [5,7,12,13]. The well-known Bromley-type formula modified for included plates cannot be applied to these systems because the horizontal component of the body force parallel to the plate may vanish.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer correlation of film boiling from a downward‐facing horizontal circular plate

Yamada

Shigechi

Momoki

et al. 1997

Heat Trans. Jpn. Res.

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Correlation equations for saturated and subcooled film boiling heat transfer from a downward‐facing horizontal circular plate are proposed based on a theoretical study using an integral method. For the case of subcooled liquids, a dimensionless heat transfer parameter is introduced to effectively correlate within ±15% the experimental data obtained under both quenching and steady‐state conditions. © 1998 Scripta Technica, Heat Trans Jpn Res, 26(7): 459–468, 1997

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“…By introducing the vapor-film-unit model, heat transfer correlation for naturalconvection film boiling with a wavy interface was focused by Nishio and Ohtake,(1992). In the previous study on the two-dimensional, steady-state, laminar film boiling heat transfer from a downward-facing horizontal plate of a finite size was analyzed by Shigechi et al(1989) and the results are examined in terms of vapor film thickness and heat transfer coefficient on bottom surface and compared with experimental data. However, the analysis is underpredicted the values of heat transfer rate by a factor of half or one-third, compare with the experimental data.…”

Section: Introductionmentioning

confidence: 99%

Modification on prediction method of heat transfer coefficient from a vertical-finite-length cylinder in saturated film boiling to discuss local heat transfer performance near the lower corner

Myo

Momoki

Yamaguchi

2018

JTST

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Modification on prediction method of heat transfer coefficient from a vertical-finite-length cylinder in saturated film boiling to discuss local heat transfer performance near the lower corner Abstract Saturated film boiling heat transfer around a vertical-finite-length cylinder has been investigated analytically to predict the local heat transfer coefficients at the bottom and lower vertical surfaces. Correlations of heat transfer for the vertical cylinder with top and bottom horizontal surface has been already analyzed by Momoki et al.(2007) and this correlations equations for heat transfer are in good agreement with the experimental data for the cylinders in saturated water. In the present study, this correlations are applied to estimate the local and average heat transfer rate through each surfaces of the cylinder. To predict the local heat transfer coefficient at the corner of the bottom surface and vertical lateral surface, Shigechi et al.(1999) analysis for film boiling heat transfer on horizontal bottom surface was modified in order to get finite vapor film thickness at the end of the bottom surface to predict finite value of local heat transfer coefficient at this end. In this modification, the vapor film thickness at the end of the bottom surface can be predicted and the prediction of the average heat transfer rate through all surfaces are in good agreement with the results of the Shigechi et al.'s method. Moreover, the local heat transfer coefficient at the end of the bottom surface can be predicted to discuss the local heat transfer characteristic of the bottom surface. The local heat transfer rate through the bottom surface and vertical lateral surface are described in terms of local Nusselt number with degree of superheat. The results on local heat transfer coefficient shows the highest value at the corner of the bottom surface and vertical lateral surface and it can be confirmed the experimental results of the vapor film collapse start from the corner of the bottom surface and vertical lateral surface of the cylinder in saturated film boiling.Keywords : lm boiling, lm collapse, eat transfer rate, ocal heat transfer coefficient

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Film Boiling Heat Transfer from a Horizontal Circular Plate Facing Downward

Cited by 5 publications

References 0 publications

Film boiling heat transfer from a horizontal circular plate facing downward

Film boiling heat transfer from a horizontal circular plate facing downward

Heat transfer correlation of film boiling from a downward‐facing horizontal circular plate

Modification on prediction method of heat transfer coefficient from a vertical-finite-length cylinder in saturated film boiling to discuss local heat transfer performance near the lower corner

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