Environmental Fluid Mechanics Research and …• Coupled Atmosphere-Surface-Subsurface Models •...
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Environmental Fluid Mechanics Research and Development using OpenFOAM at UT San Antonio, TX Xiaofeng Liu, Ph.D. 6 th OpenFOAM Workshop, 13-16, June 2011, PSU Xiaofeng Liu, Ph.D. Assistant Professor, UTSA [email protected] http://engineering.utsa.edu/CE/Liufac.html
Transcript of Environmental Fluid Mechanics Research and …• Coupled Atmosphere-Surface-Subsurface Models •...
Environmental Fluid Mechanics Research
and Development using OpenFOAM at
UT San Antonio, TX
Xiaofeng Liu, Ph.D.
6th OpenFOAM Workshop, 13-16, June 2011, PSU
Xiaofeng Liu, Ph.D.
Assistant Professor, UTSA
[email protected]://engineering.utsa.edu/CE/Liufac.html
Research Themes
• Environmental Hydraulics
– Particle-laden flows
– Buoyant flows
– Sedimentation and erosion– Sedimentation and erosion
– Surface-subsurface water interactions
– Industrial applications
– …
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Researches using OpenFOAM
• foamScour: Local scour around objects
• Seabed response under waves
• Large primary settling tanks
• Hydraulics in meandering bends• Hydraulics in meandering bends
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foamScour and Seabed Response
Hydrosystems Lab, UIUC
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Source: www.offshore-technology.com
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foamScour: 3D Scour Model With Free Surface and Mesh
Deformation(Liu and García, J. Waterway, Port, Coast and Ocean Engineering, 2008)
� 3D scour problem� Interfaces: water-air and water-sediment� Even worse: interfaces between object and air, water, sediment
� foamScour=� foamScour=� interFoam� +mesh motion� +sediment transport
2D Wall Jet Scour
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3D Scour around Pile using LES
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Seabed Response under Waves(Liu and García, International Journal of Offshore and Polar Engineering, 2007)
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Multi-zone coupling
Tt=t +0 4
Tt=t +0 24 2
3Tt=t +0 4
t=t +T0
Pore pressure in one period
Design and Optimization of Large Primary Settling Tanks(Liu and García, Journal of Hydraulic Engineering, 2011)
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t=0s
t=3600s
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Hydraulics in Meandering River Bends: St. Clair River Erosion Problem
(Liu et al., Earth Surface Processes and Landforms, resubmitted, 2011)
Area map of Great Lakes Bathymetry(The river is about 39 miles long)
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Current Development
• Gravity current simulations
– Based on multiphase buoyant flow solvers
– Buoyancy due to both scalar and particles
– Sediment entrainment and settling– Sediment entrainment and settling
• Variably saturated porous media flows
– Solve nonlinear Richards equations
– For ground water flows
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http://engineering.utsa.edu/CE/Liufac.html
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The XIX Computational Methods in Water Resources (CMWR2012) conference June 17-21, 2012, University of Illinois at Urbana-Champaign
Urbana, Illinois, USA
http://cmwr2012.cee.illinois.edu/
Announcement
Session: High-Dimensional Computational Modeling of Rivers and StreamsConveners: Marcelo H. Garcia, University of Illinois
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Xiaofeng Liu, University of Texas-San Antonio
Other sessions:• Numerical Discretization for Navier-Stokes• Numerical Discretization for Shallow Water Equations• Subsurface Biogeochemistry and Reactive Transport M odeling• Computational Ecohydrology• Coupled Atmosphere-Surface-Subsurface Models• Hybrid Multiscale Models in Subsurface Flow and Tran sport• Iterative Solvers•…
