The intermittent and annular flow condensation continuum: Pressure drops at the microscale

The intermittent and annular flow condensation continuum: Pressure drops at the microscale

•Pressure drops during condensation measured in microchannels of different aspect ratios.•Annular Flow Factor defined; used to model intermittent and annular flow pressure drops.•Effects of saturation temperature, hydraulic diameter, and aspect ratio elucidated.•Model successfully predicts pressure...

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Veröffentlicht in:International journal of multiphase flow 2016-09, Vol.84, p.129-144
Hauptverfasser: Garimella, Srinivas, Agarwal, Akhil, Fronk, Brian M.
Format: Artikel
Sprache:eng
Schlagworte:
Annular
Annular flow
Channels
Computational fluid dynamics
Condensation
Constants
Intermittent
Mathematical models
Microchannel
Multiphase flow
Pressure drop
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Beschreibung
Zusammenfassung:•Pressure drops during condensation measured in microchannels of different aspect ratios.•Annular Flow Factor defined; used to model intermittent and annular flow pressure drops.•Effects of saturation temperature, hydraulic diameter, and aspect ratio elucidated.•Model successfully predicts pressure drops in both regimes as one continuum. Frictional pressure drops were measured during condensation of refrigerant R134a in small hydraulic diameter (100 < Dh
ISSN:0301-9322
1879-3533
DOI:10.1016/j.ijmultiphaseflow.2016.03.023