Droplet impact and phase-change is a widely observed phenomenon encountered across a wide range of natural and industrial processes, such as inflight ice accretion on aircraft/wind turbines, plasma-assisted anti-/de-icing operations, phase-change-based additive manufacturing, droplet/particle transport driven by shock/blast, and energy conversions in various energy devices/systems. Advancing the understanding of the fundamental dynamics and thermal behaviors of these multiphase thermal-flow phenomena is critical to extending our knowledge in these natural and/or industrial processes and developing more efficient and safer thermal-flow systems. In this talk, I will discuss a series of experimental studies in exploring the underlying physics governing the behavior of various droplets during impact and phase-change processes central to these challenging thermal-flow phenomena. A suite of advanced thermal-flow diagnostic techniques that were implemented/developed in these experimental studies, including particle imaging velocimetry (PIV), random-dots projection imaging (RDPI), high-speed imaging, high-speed infrared (IR) imaging, and high-speed Schlieren imaging techniques, will be introduced in detail. In addition, some interdisciplinary research bridging thermal-fluid science and biomedical and geological sciences will also be discussed.
Dr. Yang Liu is currently an Assistant Professor of Mechanical Engineering at CUNY – the City College of New York (CCNY). Prior to joining CCNY in 2022, Dr. Liu was an Assistant Professor at East Carolina University. He was a postdoc in the Aircraft Icing Physics and Anti-/De-icing Technology Laboratory at Iowa State University. He obtained his Ph.D. in Aerospace Engineering from Iowa State University (ISU) in 2016 and B.S. in Aerospace Engineering from Beihang University (BUAA) in 2011.
His current research interests include multiphase flow and heat transfer in additive manufacturing, plasma-droplet interactions, flow-structure interactions in compressible turbulent flow, high-speed multiphase interactions driven by blast/shock, aircraft icing physics and anti-/de-icing technologies, and unsteady multiphase flow in energy devices.