同济大学先进热流体测试技术报告(Dr.Hui Hu)

The talk will start with description of the recent progress made by the speaker and his co-workers in developing Molecular Tagging Velocimetry and Thermometry (MTV&T) technique (U.S. patent pending) for simultaneous measurements of velocity and temperature distributions in fluid flows. Unlike most commonly-used particle-based techniques such as PIV and LDV, MTV&T technique utilizes specially-designed phosphorescent molecules that can be turned into long-lived "glowing" tracers for flow diagnostics when they are excited by photons of appropriate wavelength. The unique glamour of the molecular tagging techniques will be demonstrated from the applications to study complex fluid flow and heat transfer phenomena such as the thermal effects on the wake instabilities behind a heated cylinder, transient behavior of electroosmotic flows in electrokinetically-driven microfluidics, and quantitative visualization of the unsteady heat transfer and phase changing process within micro-sized icing water droplets for aircraft icing and wind turbine icing mitigations.  The second part of the talk will give a brief introduction about several ongoing research projects in the speaker's laboratory, which include fluid mixing control/enhancement in electrically-driven microfluidic or "Lab-on-a-chip" devices; bio-inspired aerodynamic designs for Micro-Air-Vehicle applications; and fluid-structure interaction around buildings in tornado-like winds.