波浪破碎作用下气泡演化机理与输运规律研究

波浪破碎引起水流强烈的紊动和翻滚，卷入大量空气形成气泡，气泡的演化和输运过程影响着破碎带泥沙输运、污染物迁移运动。研究波浪破碎作用下气泡运动和动力特性非常必要，并具有重要的理论意义和应用价值。通过先进量测技术开展波浪水槽实验，结合理论分析，研究波浪破碎区内气泡的产生演变及输运过程，探讨气泡与紊动特性之间的相互作用机制，揭示气泡与物质输移及能量耗散之间内在规律。在此基础上，开发三维并行化的双流体数值模型，进一步深入研究波浪破碎区水流和不同组级粒径气泡输运特性，为海岸工程建设和学科发展服务。

Breaking waves cause strong flow turbulence and curling, entraining substantial air into water to form air bubbles. Consequently, the sediment and pollutant transports in the surf zone are affected by evolution and transport of the bubbles. Study of the kinetic and kinematic characteristics of air bubbles has great importance both in its theory and application. Combining theoretical analysis and wave flume experiments with advanced measurement technology, this project first investigates the processes of air bubble production, evolution and transport, it then discusses the interaction between air bubbles and turbulence characteristics, it finally reveals the relationship between air bubbles and mass transport or energy dissipation. Based on above studies, a three-dimensional two phase fluid numerical model is further developed. The model is parallelized to study transport characteristics of air bubbles with different size gradation in the surf zone. The results are expected to serve for coastal engineering constructions and coastal researches.