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TWO-PHASE FRICTION FACTOR OBTAINED FROM VARIOUS VOID FRACTION MODELS DURING CONDENSATION OF R134A IN VERTICAL DOWNWARD FLOW AT HIGH MASS FLUX

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dc.contributor.authorDalkilic, Ahmet Selim
dc.contributor.authorLaohalertdecha, Suriyan
dc.contributor.authorWongwises, Somchai
dc.contributor.institutionauthorDALKILIÇ, Ahmet Selim
dc.date.accessioned2026-06-27T13:06:08Z
dc.date.issued2009
dc.description.abstractVoid fractions are determined in vertical downward annular two-phase flow of R134a inside 8.1 mm i.d. smooth tube. The experiments are done at average saturated condensing temperatures of 40 and 50 degrees C. The average qualities are between 0.84 - 0.94. The mass fluxes are around 515 kg m(-2)s(-1). The experimental setup is explained elaborately. Comparisons between the void traction determined from 35 void fraction correlations are done. According to the use of various horizontal and vertical annular flow void fraction models together with the present experimental condensation heat transfer data, similar void fraction results were obtained mostly for the smooth tube. The experimental friction factors obtained from void fraction correlations are compared with the friction factors determined from graphical information provided by Bergelin et. al. Effect of void fraction alteration on the momentum pressure drop is also presented.en
dc.identifier.endpage206
dc.identifier.isbn978-0-7918-4848-7
dc.identifier.startpage193
dc.identifier.urihttps://hdl.handle.net/20.500.14981/49744
dc.identifier.wos000265637100025
dc.language.isoeng
dc.publisherAMER SOC MECHANICAL ENGINEERS
dc.relation.conferenceASME Heat Transfer Summer Conference
dc.relation.ispartofHT2008: PROCEEDINGS OF THE ASME SUMMER HEAT TRANSFER CONFERENCE - 2008, VOL 2
dc.subjectPRESSURE-DROP
dc.subjectHEAT-TRANSFER
dc.subjectPREDICTION
dc.subjectGAS
dc.subjectThermodynamics
dc.subjectEngineering
dc.subjectPhysics
dc.titleTWO-PHASE FRICTION FACTOR OBTAINED FROM VARIOUS VOID FRACTION MODELS DURING CONDENSATION OF R134A IN VERTICAL DOWNWARD FLOW AT HIGH MASS FLUX
dc.typeProceedings Paper
dspace.entity.typePublication
local.import.sourceWOS

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