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Research summary
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1.Modeling and simulation of two-phase particle-laden flows
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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. |
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2.Advanced coastal
and estuarine modeling
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| 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. |
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3.Dynamics of
multi-scale sediment plume
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| 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.
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4.Handling
interfaces in CFD
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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. |
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5.Applying force
element theory to turbulent flows
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