Numerical and experimental studies on flow condensation in hydrophilic microtubes

•A parametric study was performed to investigate the flow condensation in microtubes.•The dynamic contact angle was used to obtain wall temperature and shear stresses.•The effect of diameter, inlet vapor quality, and vapor mass flux was assessed.•A non-dimensional analysis was performed to define fl...

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Veröffentlicht in:	Applied thermal engineering 2021-10, Vol.197, p.117359, Article 117359
1. Verfasser:	Sadaghiani, Abdolali K.
Format:	Artikel
Sprache:	eng
Schlagworte:	Annular flow Condensation Diameters Dimensional analysis Dynamic contact angle Energy & Fuels Engineering Engineering, Mechanical Film thickness Flow condensation Flow mapping Flow pattern Fluid dynamics Heat conductivity Heat exchangers Heat transfer Heat transfer coefficients Liquid film thickness, Bubble dynamics Liquid-vapor interfaces Liquid/vapor interface Mathematical analysis Mechanics Microchannels Non-dimensional analysis Numerical models Physical Sciences Pressure drop Science & Technology Shear forces Slug flow Technology Thermodynamics
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Beschreibung
Zusammenfassung:	•A parametric study was performed to investigate the flow condensation in microtubes.•The dynamic contact angle was used to obtain wall temperature and shear stresses.•The effect of diameter, inlet vapor quality, and vapor mass flux was assessed.•A non-dimensional analysis was performed to define flow regime transition criteria.•A flow map for condensing flow in microtubes with 250 μm 500 µm.
ISSN:	1359-4311 1873-5606
DOI:	10.1016/j.applthermaleng.2021.117359