Local frictional pressure drop during vaporization of R-12 through capillary tubes

Song, Lin; Kwok, C. K.; Li, R.-Y.; Chen, Z.-H.; Chen, Z.-Y.

doi:10.1016/0301-9322(91)90072-b

Cited by 323 publications

(69 citation statements)

References 3 publications

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“…Their overall performances were also evaluated in Table 5. It is obvious that all relevant correlations except that of McAdams over-predict the two-phase flow frictional pressure drop as a whole and the latter provides the least deviation: 76.7% of the predictions lie in the error bound of ±30% for the Lin et al [48] …”

Section: Comparisons With Existing Flow Pattern-independent Modelsmentioning

confidence: 98%

“…Therefore, how to choose a reasonable and proper mixture viscosity from the many available homogeneous viscosity correlations [42,47,48] is crucial to a successful interpretation of the two-phase frictional pressure drop data. As we found that fluid laminar flow in the present microchannels generally obeys classic theory, the selection of viscosity correlations was limited to those that would cause the homogeneous Reynolds number, Re TP , under the present experimental conditions lower than 2000.…”

Section: Comparisons With Existing Flow Pattern-independent Modelsmentioning

confidence: 99%

“…As we found that fluid laminar flow in the present microchannels generally obeys classic theory, the selection of viscosity correlations was limited to those that would cause the homogeneous Reynolds number, Re TP , under the present experimental conditions lower than 2000. With this constraint, the available useful viscosity correlations were those by McAdams [42], Owens [42], and Cicchitti et al [47] and Lin et al [48]. The corresponding equations are given in Table 5.…”

Section: Comparisons With Existing Flow Pattern-independent Modelsmentioning

confidence: 99%

See 2 more Smart Citations

Pressure drops of single and two-phase flows through T-type microchannel mixers

Yue

Chen

Yuan

2004

Chemical Engineering Journal

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Section: Comparisons With Existing Flow Pattern-independent Modelsmentioning

confidence: 98%

Section: Comparisons With Existing Flow Pattern-independent Modelsmentioning

confidence: 99%

Section: Comparisons With Existing Flow Pattern-independent Modelsmentioning

confidence: 99%

See 1 more Smart Citation

Pressure drops of single and two-phase flows through T-type microchannel mixers

Yue

Chen

Yuan

2004

Chemical Engineering Journal

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“…En este grupo se encuentran las ecuaciones de McAdams et al (1942), Bankoff (1960), Dukler et al (1964), Beattie y Whalley (1982), Lin et al (1991) y Fourar y Bories (1995. Como ejemplo se graficó el comportamiento de la viscosidad reportada por Fourar y Bories (1995).…”

Section: Estudio De La Viscosidad De Mezclaunclassified

Efecto de la Viscosidad y de la Densidad de Mezcla en el Gradiente de Presión de Flujo Homogéneo Gas-Líquido en Tuberías Horizontales

García¹,

García

2009

Inf. tecnol.

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ResumenEn este trabajo se evalúa la precisión de 76 modelos homogéneos de gradiente de presión para determinar el gradiente de presión experimental reportado en una base de 2415 datos de flujos bifásico gas-líquido en tuberías horizontales. Estos modelos se formularon a partir de 4 ecuaciones de densidad de mezcla combinadas con 19 ecuaciones de viscosidad de mezcla. Al estudiar el efecto de la viscosidad y de la densidad de mezcla en el gradiente de presión, utilizando el modelo homogéneo, se observa que el mejor modelo obtuvo un error absoluto promedio de 25.7%, mientras que el peor modelo obtuvo un error cercano al 2000%. Los resultados obtenidos indican que la precisión del modelo homogéneo de gradiente de presión de flujo bifásico gas-líquido, depende significativamente de la adecuada selección de las ecuaciones de viscosidad y de densidad de mezcla. Palabras clave: gradiente de presión, viscosidad de mezcla, densidad de mezcla, flujo gas-líquido Effect of the Mixture Viscosity and the Mixture Density on the Pressure Gradient of Gas-Liquid Homogeneous Flow in Horizontal Pipelines AbstractIn this work the performance of 76 pressure gradient homogeneous models is evaluated in order to determine the experimental pressure gradient reported in a database consisting of 2415 gas-liquid two-phase flow experiments in horizontal pipes. These models were formulated starting from 4 mixture density equations combined with 19 mixture viscosity equations. To study the mixture viscosity and the mixture density effect in the pressure gradient, using the homogeneous model, it is observed that the best model gave an average absolute error of 25.7%, while the worst model obtained an error close to 2000%. The obtained results indicate that the performance of the gasliquid two-phase flow pressure gradient homogeneous model depends significantly on the appropriate selection of the mixture viscosity and the mixture density equations.

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“…onde n  é a fração de vazio das gotículas líquidas arrastadas em meio ao núcleo de vapor dada pelas seguintes equações: Lin et al (1991).…”

Section: Métodos Preditivos Baseados Em Multiplicadores Bifásicosunclassified

Estudo teórico-experimental da perda de pressão durante a ebulição convectiva de refrigerantes halogenados no interior de microcanais circulares

Silva¹

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Local frictional pressure drop during vaporization of R-12 through capillary tubes

Cited by 323 publications

References 3 publications

Pressure drops of single and two-phase flows through T-type microchannel mixers

Pressure drops of single and two-phase flows through T-type microchannel mixers

Efecto de la Viscosidad y de la Densidad de Mezcla en el Gradiente de Presión de Flujo Homogéneo Gas-Líquido en Tuberías Horizontales

Estudo teórico-experimental da perda de pressão durante a ebulição convectiva de refrigerantes halogenados no interior de microcanais circulares

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