The K-22 Heat Transfer Visualization Committee sponsored the 24th Heat Transfer Photogallery during the 2017 Summer Heat Transfer Conference at the Hyatt Regency Bellevue, Bellevue, WA, on July 9–12, 2017. Nine entries were submitted to the Photogallery sessions. A peer-reviewed evaluation was conducted by both the participants and selected HTD K-22 Technical Committee members, which identified four final entries for publication in the 2018 ASME Journal of Heat Transfer February issue. Among the selected entries, two visualize droplet phenomena, and the remainder visualizes phase change at extreme temperatures.
The purpose of publishing photogallery entries in JHT is to draw attention to innovative features of visualization techniques and to present aesthetic qualities of heat and mass transport phenomena. To focus on visualization images and schematics for each entry, a text is kept to a minimum and further details should be sought directly from the corresponding authors. Our wish is that the journal readers enjoy viewing these collections, acquire knowledge in state-of-the-art visualization techniques, and promote participation in future Photogallery sessions at the SHTC and ASME-IMECE conferences.