Details

Autor(en) / Beteiligte

• Markal, Burak
• Aydin, Orhan
• Avci, Mete

Titel

Effect of hydraulic diameter on flow boiling in rectangular microchannels

Ist Teil von

• Heat and mass transfer, 2019-04, Vol.55 (4), p.1033-1044

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• An experimental study is conducted to investigate the effect of hydraulic diameter on the saturated flow boiling characteristics of deionized water in parallel rectangular microchannels. Experiments have been performed for the mass fluxes of 51, 65, 78 and 93 kg m −2  s −1 , and the hydraulic diameters of 100, 150, 200 and 250 μm. The wall heat flux ranges from 35.9 to 105.6 kW m −2 . To eliminate the effect of aspect ratio and to address clearly the effect of hydraulic diameter, all the channels are designed with square cross section. Flow visualization studies are performed for a better understanding of the underlying physical phenomena. Effects of heat flux, mass flux and vapor quality on the heat transfer and total pressure drop have been investigated, too. It is concluded that hydraulic diameter has significant influence on both of the local two phase heat transfer coefficient and the total pressure drop.