Our research group primarily works on the computational and theoretical study of fluid dynamics in areas including turbulence, boundary layers, free-surface flows, water waves, multiphase flows, and fluid-structure interactions. Our research is supported by federal and state agencies and industry. The projects originate from a wide range of applications, including mechanical engineering, environmental fluid mechanics, geophysical fluid dynamics, renewable energy, and biofluids; however, basic research aiming at the fundamental mechanisms in fluid dynamics is always a major theme of our studies.
Fundamental Fluid Dynamics is a main focus of our research, covering the following areas:
Computational Fluid Dynamics (CFD) is a major research tool in our group. Using direct numerical simulation (DNS) and large-eddy simulation (LES) for turbulent flows, together with inviscid-flow-based simulation for water waves, we have developed a suite of advanced simulation codes in house, including:
- DNS and LES of turbulence with wavy boundaries on boundary-fitted grid.
- Multiphase flow simulation, including level-set and volume-of-fluid methods for free-surface flows and Lagrangian-Eulerian method for particle-laden flows.
- Phase-resolved simulation of water waves using high-order spectral method and boundary integral method.
- Simulation of flows in complex geometries with advanced immersed boundary methods and fluid-structure interactions.
- Data assimilation for incorporating laboratory and field measurements and remote sensing data into our simulations.
- Adaptive mesh refinement for simulating complex flows with locally fine structures.
Our studies have a broad spectrum of applications:
- Environmental Fluid Mechanics:
- Geophysical Flows:
- Physical oceanography, with a focus on upper-ocean processes including air-sea interactions and wave-current interactions.
- Atmospheric flows, with a focus on the surface layers over land and oceans.
- Wind-wave interaction, including the wave effect on the turbulent wind and the wave evolution under wave forcing.
- Land-air-sea interaction in coastal region, e.g., the wind blowing across the land and sea and the interaction of ocean-bathymetry and waves.
- Benthic boundary layer and the interactions of waves with sediment and mud.
- Canopy flows, such as flow over aquatic plants.
- Engineering and Industrial Applications:
More details of our studies in each area can be found by following the links above.