Air-water gas transfer across the bubble interface is predominant as the net surface area of thousands of entrained air bubbles is much greater than the area of the free-surface.
New experimental investigations have been conducted to simulate different mechanisms of wave breaking and air bubble entrainment.
Industrial Two-Phase Flows In high-velocity turbulent flows, air bubbles are entrained at the free surface.
This process (self-aeration) is caused by the turbulent velocity fluctuations acting next to the free surfaces.
The results enable a better understanding of the fluid mechanics of free-surface air-water flows (CHANSON 1997, Academic Press).
Applications include some optimisation of hydraulic structure design, mixing devices in chemical plants, firefighting equipment.Engineering History and Heritage Several studies are conducted in parallel to investigate the historical development of civil engineering and hydraulic structures.Writing a research paper may seem challenging, even though it is a substantial part of everyday student life.A joint collaboration is underway with Japan to compare systematically the characteristics of shallow water bays and estuaries.Coastal engineering studies include the hydrodynamics of tidal bores, whirlpools and breaking waves.You are required to write at least one research paper in a semester for the majority of your subjects. They will demand a lot of time and effort from you.At the same time, do not let your research paper give you anxiety or hurt your overall studies.The results enable a better understanding of the aeration mechanisms.The study is applied to water quality problems downstream of hydraulic structures, the greenhouse effect and ocean-atmosphere gas exchange processes.Two research collaborations are active with Taiwan and Japan.Some results showed that air entrainment at plunging breakers is similar to bubble entrainment by plunging liquid jets.