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Research summary

1.Modeling and simulation of two-phase particle-laden flows (懸浮細顆粒固液二相流的模擬及模式發展)

Two-phase particle-laden flow is an important phenomenon in industrial, biological, and geophysical flows. Obtaining the better understanding in this context relies on computational tools that properly treat flow-particle interactions in different scales. Besides focusing on the development of advanced numerical methods, we are also interested in obtaining relevant parameterization to achieve better efficiency in real-world applications. We have been collaborating with research groups from Institute of Applied Mechanics and Department of Biological Environmental Systems Engineering at NTU. We focus on developing advanced two-phase computational tools and applying to a various flow problems in different fields.

2.Advanced coastal and estuarine modeling (先進海洋模式的發展與應用)

During 2009-2011, as a postdoctoral scholar at Stanford University, Prof. Chou was the lead developer in building SUNTANS sediment and wave model. The Stanford coastal model, SUNTANS, is a Navier-Stokes solver that solves coastal and estuarine hydrodynamics with non-hydrostatic pressure on unstructured grids. While the coupled tide, wave, and sediment module is currently applied to the San Francisco Bay sediment project, we are also building this model to become a powerful prediction and diagnostic tool to study complex coastal processes in Taiwan. Current mission includes proper grid generation, construction of boundary conditions, and field data validation. As a long term goal, the model will be capable of predicting changes of coastal environments under different human-made and natural scenarios due to climate change.

3.Dynamics of multi-scale sediment plume (多重尺度泥沙異重流動力學)

In estuaries where fresh river flow meets the salty oceanic water, fine suspensions in the river form hyperpycnal (turbidity currents) and hypopycnal plumes. While interacting with density stratification and complex wave climate in the coastal ocean, sediment plumes exhibit interesting behaviors that play important role in transport and mixing as well as morphological evolution. Through the high-resolution numerical study, we attempt to advance our understanding of plume dynamics in different scales, with special focuses on its buoyance-driven vertical motions and their influences in large-scale mixing processes. 

4.Handling interfaces in CFD (計算流體動力學中界面的處理)

When solving complex flow problems in CFD, resolving flow-solid and air-liquid interfaces is always an interesting but challenging problem. Although there have been extensive studies focusing on this research area, major applications are still limited in simple test cases, such as simple geometries and low-Reynolds number flows. In general, these numerical methods include: arbitrary Lagrangian-Eulerian (ALE), level-set method, immersed boundary method (IBM) and many other methods. My group focuses on both theoretical and practical aspects of these methods and aims to solve more realistic flow problems relevant to environmental, energy, and industrial issues.

5.Applying force element theory to turbulent flows (力元理論在紊流的應用)

 

 

 

 

 

 

 

 

 

國立臺灣大學工學院應用力學研究所•106台北市大安區羅斯福路四段1號