Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 20, 2018 - October 21, 2018
The characteristics of air-water two-phase flows in microchannels with rectangular cross sections of 1mm × 0.5mm were investigated experimentally. Two channels with different wall wettability were tested. In Case 1, all the channel walls were treated to be hydrophobic by spray coating. In Case 2, three walls were treated to be hydrophilic and one wall was hydrophobic. It was found that water droplets flowed intermittently in Case 1 while liquid film was formed steadily in Case 2. The mean void fraction in Case 1 was much smaller than that in Case 2, but the pressure drop in Case 1 was almost the same as that in Case 2.
