the differences between flow patterns of the two cases were addressed.
It is noted from Triplett et al. [17,18] that based on different
channel cross-sectional shapes, the adiabatic two-phase air–
water flow characteristics in semi-triangular micro-channels were
similar to those obtained from circular channels. The heat transfer
of an air–water flow in parallel micro-channels of 0.1 mm in
hydraulic diameter was experimentally investigated by Hetsroni
et al. [19]. Their results showed a decrease in the Nusselt number
with an increasing gas flow rate, which was opposite to the results
obtained by Bao et al. [15]. Betz and Attinger [20] showed segmented
flow, an intermittent pattern of gas bubbles and liquid
slugs, resulting in the heat transfer enhancement up to 140% in a
micro-channel heat sink when compared with single-phase liquid
flow.
Heat transfer characteristics of a non-boiling two-phase flow in
micro-channels with different diameters were studied by Choo and
Kim [21]. Air and water were used as working fluids to examine the
dependence of Nusselt number on the channel diameter. They
found that with channel diameters of 0.506 and 0.334 mm, the
Nusselt number increased with the increment of gas flow rate,
but decreased with increasing gas flow rate when the channel
diameters of 0.222 and 0.140 were employed.
Marchitto et al. [22] studied two-phase flow distribution in parallel
upward channels. They reported that the phase distribution
the differences between flow patterns of the two cases were addressed.It is noted from Triplett et al. [17,18] that based on differentchannel cross-sectional shapes, the adiabatic two-phase air–water flow characteristics in semi-triangular micro-channels weresimilar to those obtained from circular channels. The heat transferof an air–water flow in parallel micro-channels of 0.1 mm inhydraulic diameter was experimentally investigated by Hetsroniet al. [19]. Their results showed a decrease in the Nusselt numberwith an increasing gas flow rate, which was opposite to the resultsobtained by Bao et al. [15]. Betz and Attinger [20] showed segmentedflow, an intermittent pattern of gas bubbles and liquidslugs, resulting in the heat transfer enhancement up to 140% in amicro-channel heat sink when compared with single-phase liquidflow.Heat transfer characteristics of a non-boiling two-phase flow inmicro-channels with different diameters were studied by Choo andKim [21]. Air and water were used as working fluids to examine thedependence of Nusselt number on the channel diameter. Theyfound that with channel diameters of 0.506 and 0.334 mm, theNusselt number increased with the increment of gas flow rate,but decreased with increasing gas flow rate when the channeldiameters of 0.222 and 0.140 were employed.Marchitto et al. [22] studied two-phase flow distribution in parallelupward channels. They reported that the phase distribution
การแปล กรุณารอสักครู่..