应用DES(Detached-Eddy Simulation)方法数值模拟了3种不同失速类型的翼型的升力特性.DES方法结合了RANS(Reynolds-averaged Navier-Stokes)和LES(Large Eddy Simulation approaches)的优点.基于Spalart-Allmaras湍流模型,在近壁面DES体现为RANS模型的特点而在远离物面处又具有LES的亚格子模型的特性.对此模型使用了LU-SGS隐式格式求解.通过和实验结果对比,显示这种方法可以有效地预测翼型的失速特性.

Detached—Eddy Simulation方法模拟不同类型翼型的失速特性

Smoothed particle hydrodynamics (SPH) for complex fluid flows: Recent developments in methodology and applications

A new level set numerical wave tank with improved density interpolation for complex wave hydrodynamics

Experiments and computations of solitary-wave forces on a coastal-bridge deck. Part I: Flat Plate

Experiments and Computations of Solitary-Wave Forces on a Coastal-Bridge Deck. Part II: Deck with Girders

Vortex shedding suppression and wake control: A review

Wave forces on a submerged horizontal plate-Part II: Solitary and cnoidal waves

Recent natural extreme events, such as Hurricane Ike in the U.S. (2008), Tohoku tsunami in Japan (2011), and Typhoon Haiyan in Southeast Asia (2013), have caused significant damage to the decks of coastal bridges. The failure of the structure occurs when wave-induced loads on the decks of coastal bridges exceed the bridge capacity, resulting in partial removal or a complete collapse of bridge decks. Tsunami, storm waves, and storm surge are known to be the ultimate agents of such failures. An understanding of the failure mechanism and possible solutions require a better knowledge of the destructive loads on the structure. Interaction of surface waves with the bridge deck is a complex problem, involving fluid–structure interaction, wave breaking, and overtopping. Possible submergence of the deck and entrapment of air pockets between girders can increase destructive forces and add to the complexities of the problem. In recent years, remarkable progress has been made on this topic, resulting in some new findings about the failure mechanism and the destructive wave loads. A review of the key studies on wave loads on the coastal bridge decks, including those in the past and very recently, is presented here. Emphasis is given to the pioneering works that have significantly improved our understanding of the problem. Challenges associated with the existing solutions are highlighted, and suggestions for future studies are provided.

Masoud Hayatdavoodi

Papers

Vortex shedding suppression and wake control: A review

Experiments and computations of solitary-wave forces on a coastal-bridge deck. Part I: Flat Plate

Experiments and Computations of Solitary-Wave Forces on a Coastal-Bridge Deck. Part II: Deck with Girders

Wave forces on a submerged horizontal plate-Part II: Solitary and cnoidal waves

Review of Wave Loads on Coastal Bridge Decks