CMIS Research - Computational Fluid Dynamics


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Computational Fluid Dynamics

Modelling Extreme Flow Events: Dam Breaks

Many problems in environmental sciences such as tsunamis, storm surges and dam-breaks involve the large-scale movement of solids and fluids. They are often irregular in their timing, difficult to observe and measure, involve multiple types of physical processes on a broad range of spatial and temporal scales and can be catastrophic in their consequences.

Computational modelling can play an important role both in helping to understand the nature of the fundamental processes involved, and in predicting the detailed outcomes of various types of events in specific locations. Particle-based modelling methods have specific advantages over traditional grid or mesh-based continuum methods for these types of problems. These include highly accurate and non-diffusive prediction of complex free-surface behaviour including wave motion, fragmentation and splashing; accurate and automatic convection of material; and the straightforward inclusion of multiscale multi-physics.

The CFD group in CMIS has been developing the particle based Smoothed Particle Hydrodynamics (SPH) code and the Granular Flow (GF) code to model geophysical flows using real three-dimensional topography obtained from Digital Terrain Models (DTM). Due to the use of real topographic information the results from the SPH model can be directly compared with disaster scenarios.

The following are movies of Geophysical SPH/GF simulations modelled by the CFD group:

Note: Some movies are DivX encoded to reduce file size.

If you have any problems playing these videos - you should ensure that you have
the latest codecs installed by visiting the DivX website and downloading the codecs.

http://www.divx.com/divx/

Movie 1: Dam break (high resolution)-view 1 XviD compressed avi file 1.33MB	Dam breaking on a real topography along the Californian coastline. This is a higher resolution version of the previous simulation. The topography texture is a google map image of the region.
Movie 2: Dam break (high resolution)-view 2 XviD compressed avi file 1.33MB	Dam breaking on a real topography along the Californian coastline. This is a higher resolution version of the previous simulation. The topography texture is a google map image of the region.
Movie 3: St Francis Dam Break Simulation XviD compressed avi file 8MB	Simulation of a real dam break event that occurred on the 12th of March 1928 close to what is now Santa Clarita, California.
Movie 4: St Francis Dam Break with Dam Walls. Transparent Fluid XviD compressed avi file 2MB	Simulation of a real dam break event that occurred on the 12th of March 1928 close to what is now Santa Clarita, California. With dam walls included.
Movie 5: St Francis Dam Break with Dam Walls. Fluid coloured by velocity XviD compressed avi file 11.9MB	Simulation of a real dam break event that occurred on the 12th of March 1928 close to what is now Santa Clarita, California. With dam walls included.
Movie 6: St Francis Dam Break without Dam Walls. Fluid coloured by velocity XviD compressed avi file 4.19MB	St Francis dam break simulation without dam walls. A far view is shown here.
Movie 7: Geheyan Dam collapse oblique view XviD compressed avi file 18.2MB	Oblique view of the Geheyan Dam collapse
Movie 8: Geheyan Dam collapse top view XviD compressed avi file 17.1MB	Top view of the Geheyan Dam collapse
Movie 9: Geheyan Dam collapse close-up view1 XviD compressed avi file 18.9MB	Geheyan Dam collapse
Movie 10: Geheyan Dam collapse close-up view2 XviD compressed avi file 8.6MB	Geheyan Dam collapse
Movie 11: Geheyan Dam collapse close-up view3 XviD compressed avi filem 12.4MB	Geheyan Dam collapse
Movie 12: Geheyan Dam collapse close-up view4 XviD compressed avi file 19MB	Geheyan Dam collapse
Movie 13: SW simulation of mundaring dam break XviD file 2.0 MB	Mundaring dam break simulated by SW method. The water approaches the Perth CBD. The water is coloured by velocity.
Movie 14: SW simulation of mundaring dam break XviD file 1.5 MB	Mundaring dam break simulated by SW method. The water approaches the Perth CBD. The water is coloured by its local height.
Movie 15: SPH simulation Perth CBD flooding XviD file 2.2 MB	Simulation of flooding around Perth CBD caused by the Mundaring dam break.
Movie 16: SPH simulation Perth CBD flooding XviD file 7.9 MB	Simulation of flooding around Perth CBD caused by the Mundaring dam break. The water is coloured by velocity.
Movie 17: Multi-scale flooding modelling XviD file 3.5 MB	Water flooding an urban environment following dam collapse using a multi-scale SW SPH approach including dam reservoir.

Return to SPH movies main page

Go to GF movies main page