Track 7: Theoretical, Applied and Computational Fluid Mechanics

07.1: Fluid-Vegetation Interaction: Laboratory Experiments, Field Observations and Numerical Modeling
Organizers: Jane McKee Smith and Q. Jim Chen
Description: Flooding and wave damage resulting from hurricanes, extreme storms, and tsunamis are a significant risk in coastal regions. In low laying coastal areas, infrastructure is highly vulnerable to inundation and wave impacts during severe storms. The severity of this threat is exacerbated by sea level rise and possible increases in the intensity of storms due to climate change. Vegetative coastal buffers, such as wetlands or coastal forests, show potential to reduce storm surge and dissipate wave energy, but limited information exists to quantify the fluid-vegetation interaction. For example, existing rules of thumb for surge attenuation in wetlands lack inclusion of storm parameters or wetland characteristics. Existing storm surge and wave models used in engineering studies include vegetation in simplified formulations, e.g., increased bottom roughness, which consider only crude descriptions of vegetation characteristics and are largely unverified in the field, especially for large wave and surge events.

The objective of this mini-symposium is to bring together the entire spectrum of research and development in the area of fluid-vegetation interaction. This includes laboratory and field experimentalists using both artificial and real vegetation and numerical modelers working all levels of fidelity and resolution (from numerical wave flumes to depth- and time-averaged shallow-water equations or phase-averaged wave equations). The mini-symposium will provide researchers, modelers, and practitioners with a better understanding of the existing data sets, data analysis methods, vegetation characterizations, dissipation parameterizations, modeling techniques, and model validation available for fluid-vegetation interaction. The mini-symposium will also highlight areas of future develop and collaboration.

07.2: Particulate Multiphase Flows
Organizer: Don Liu
Description: Particulate multiphase flows involving one or two fluids are ubiquitous phenomena in nature as well as engineering and science. Most fluid mechanics problems involve more than one media in reality.
The mini-symposium focuses on theoretical, experimental and numerical approaches for particulate multiphase flows, as well as multi-physics or interdisciplinary applications. The contribution from all aspect of particulate multiphase flows are welcomed and presentations involving interdisciplinary research are encouraged.
The typical topics include but not limited to novelmethodology and formulation, new algorithms and techniques, innovative analyses and derivations, emerging computational challenges and technologies about particulate multiphase flows.

07.3: Environmental Fluid Mechanics
Organizer: Scott A. Socolofsky
Description: In the wake of two of the largest environmental catastrophes in recent history (the Macondo oil spill and the Fukushimi accident), fate and transport models have become a key focus of development for better response and planning. These models must deal with turbulent transport and dispersion in large volumes with the complication of density stratification and buoyancy. Complex geometry is also often present either in the form of multiphase flow, flow interaction with complex bathymetry, or in coastal and riverine flows through enhanced bottom roughness or plant stands. In many cases, these complex structures responsible for significant turbulence production (e.g., bed forms, plant stems, individual sediment grains, or bubbles and droplets) are subgrid to the relevant hydrodynamic models so that some form of closure in both the hydrodynamics and transport are required. These problems arise throughout the topic of environmental fluid mechanics in a whole suite of problems related to environmental fluid transport.

The objective of this mini-symposium is to address the wide range of fluid mechanical processes affecting fate and transport of substances through the hydrosphere and atmosphere at the local or regional scale. This includes approaches using analytical, experimental and/or numerical techniques. Applications as well as development of new techniques are welcome. While the session topic is quite broad, we especially encourage presentations on coastal processes, natural hazards, sustainable energy, and risk assessment.

07.4: Computational Hydrodynamics (Cancelled)

07.5: Coastal Hazards and Hydraulics
Organizers: Q. Jim Chen and Jens Figlus
Description: Many megacities, such as New York and Shanghai, with more than 10 million people each are located in the coastal zone worldwide. More than 53% of the U.S. population lives in coastal regions, which are home to a wealth of natural and economic resources. Coastal flooding caused by geo-hazards (earthquakes and landslides) and atmospheric-oceanic hazards (tropical cyclones and extra-tropical storms) has killed millions of people living in coastal regions worldwide, particularly in low-lying deltas modified by man. This threat to humanity increases as coastal populations continue to grow, sea level rises, and coastal zones are increasingly impacted by humans. Coastal hazards are not limited to flooding. Erosion of barrier islands, pollution due to oil spills, wind-induced damage, etc. also impact many coastal communities. For instance, the Mississippi River Delta along the Louisiana Gulf coast is losing a football field of wetlands every hour. Coastal hazards are rich in fluid mechanics and complex in solutions as they are intertwined with human activities.

The objective of this mini-symposium is to bring together researchers in the area of observing, modeling, simulating and predicting coastal hazards. This includes laboratory and field experimentalists collecting data of fluid motion and particulate transport associated with a coastal hazard, and numerical modelers working across all temporal and spatial scales, ranging from tsunami generation and propagation across an ocean to wave overtopping on a levee and surge-induced bridge pier scour. Research results on riverine and coastal hydraulics are also welcome. The mini-symposium will provide a forum for researchers and forecasters to exchange ideas and information about the existing data sets, data collection and analysis methods, modeling techniques, and computational methods. The mini-symposium will also provide an opportunity to develop interdisciplinary collaborations.

07.6: Computational Methods for Fluid-Structure Interactions
Organizer: Lucy Zhang
Description: Computational methods in solving fluid and fluid-structure interactions have become a great interest due to their broad applications that include biomedical, civil and mechanical engineering fields. Accurate modeling and simulations can provide detailed information for analysis that can complement experiments.

The symposium will focus on the methods development, the fundamental theory and solution techniques, as well as applications and promoting collaborations between scientists, engineers, mathematicians and physicians.

The contributions in all aspects of fluid and fluid-structure interactions are invited. Presentations in the interdisciplinary research are strongly encouraged. Some ofthe topics to be featured are:

- Theory and methods development for fluid and fluid-structure interactions
- New formulations and solution techniques
- Applications in all engineering fields including biomedical, civil and mechanical engineering