Latest revision as of 12:15, 16 April 2013

3D numerical hydrodynamic models

Type

Hydromorphological models

Basic principles

Fundamental equations for conservation of water mass and water flow momentum, time-averaged over all turbulent fluctuations (RANS = Reynolds Averaged Navier-Stokes equation) or time-averaged over only the smaller turbulent fluctuations (LES = Large Eddy Simulation)

Outputs

Flow velocities, water depths, water levels, flow shear stresses

Rivertypes

• Reach
•    Reach

Related Pressures

• Surface water abstraction
• Groundwater abstractions
• Hydropeaking
• Sediment discharge from dredging
• Reservoir flushing
• Hydrological regime modification
• Interbasin flow transfers
• Discharge diversions and returns
• Alteration of instream habitat
• Sand and gravel extraction
• Sedimentation and sediment input
• Embankments, levees or dikes
• Loss of vertical connectivity
• Impoundment
• Alteration of riparian vegetation
• Channelisation / cross section alteration
• Other pressures

Related Measures

• Improve/Create water storage
• Reduce water consumption
• Increase minimum flows
• Recycle used water
• Improve water retention
• Reduce surface water abstraction with return
• Water diversion and transfer
• Reduce surface water abstraction without return
• Reduce groundwater extraction
• Reduce anthropogenic flow peaks
• Modify hydropeaking
• Shorten the length of impounded reaches
• Increase flood frequency and duration in riparian zones or floodplains
• Favour morphogenic flows
• Link flood reduction with ecological restoration
• Ensure minimum flows
• Manage aquatic vegetation
• Establish environmental flows / naturalise flow regimes
• Create low flow channels in over-sized channels
• Narrow water courses
• Widen water courses
• Allow/increase lateral channel migration or river mobility
• Remeander water courses
• Shallow water courses

Useful references

Selected software systems

CFX-5:

Comet:

Delft3D: http://www.deltaressystems.com/hydro/product/621497/delft3d-suite

FIDAP: http://www.hpcvl.org/software/applications/physics-and-engineering-software/fidap

Flo++:

Flow-3D: http://www.flow3d.com/

Fluent:

PHOENICS:

Rsim-3D:

SSIIM: http://folk.ntnu.no/nilsol/ssiim/

STAR-CD:

SWIFT:

TELEMAC-3D: http://www.opentelemac.org/index.php?option=com_content&view=article&id=18&Itemid=2&lang=en

Theoretical background

AEA (2002): CFX-5 User Documentation Version 5.5.1, AEA Technology Engineering Software Limited, Olsen, 2000arloo, Ontario, Canada.

Fischer-Antze T., Stoesser T., Bates P., Olsen N.R.B. (2001): 3D numerical modelling of open channel flow with submerged vegetation. Journal of Hydraulic Research, Vol. 39, pp. 303-310. http://www.tandfonline.com/doi/abs/10.1080/00221680109499833

Fluent (1998): FIDAP 8 Theory Manual. Fluent Inc., Lebanon, New Hampshire, USA.

Fluent (2001): FLUENT 6.0 User´s Manual. Fluent Inc., Lebanon, New Hampshire, USA.

Hervouet J.M., Hubert J.-L., Janin J.-M., Lepeintre F., Peltier E. (1994): The computation of free surface flows with TELEMAC: an example of evolution towards hydroinformatics. Journal of Hydraulic Research, Vol. 32, extra issue, pp. 45-64. http://www.tandfonline.com/doi/abs/10.1080/00221689409498804

Olsen N.R.B. (1999a): Computational Fluid Dynamics in Hydraulic and Sedimentation. http://folk.ntnu.no/nilsol/cfd/class2.pdf

Spalding D.B. (1986): PHOENICS-Beginners Guide and User Manual. CHAM London.

Tritthart M. and Gutknecht D. (2005): Validation of a three-dimensional numerical model for river flow based on polyhedral finite volumes. Proc. XXXI IAHR Congress, 11.-16. September, Seoul, Korea, pp. 581-590.

Tritthart M. (2000): Anwendung von dreidimensionalen numerischen Methoden beim Sedimentmanagement in Talsperrenreservoirs. Diplomarbeit, Universität Innsbruck.

Tritthart M. (2005): Three-Dimensional Numerical Modelling of Turbulent River Flow using Polyhedral Finite Volumes. Wiener Mitteilungen Wasser-Abwasser-Gewässer, Band 193, Institut für Wasserbau und Ingenieurhydrologie, TU Wien. http://www.hydro.tuwien.ac.at/uploads/media/Wiener-Mitteilungen-Band-193_01.pdf

Tritthart M. (2006): 3D-Fließgewässermodellierung mit vielflächigen finiten Volumen an der österreichischen Donau. Wasserbaukolloquium 2006 - Strömungssimulation im Wasserbau, 9.-10. März 2006, Dresden; Dresdner Wasserbauliche Mitteilungen, Band 32, Technische Universität Dresden, S. 193-200.

Sample applications

Habersack H., Mayr P., Gierlinger R., Schneglberger S. (2000): Mehrdimensionale Abflussmodellierung am Beispiel der Lafnitz. Wiener Mitteilungen Band 165, Wien.

Hauer C., Unfer G., Schmutz S., Tritthart M., Habersack H. (2007): The necessity of modelling the stability of rheophilous cyprinids spawning grounds including comparing 1D, 2D and 3D numerical models. Proc. 6th Ecohydraulics Symposium, 18.-23.2.2007, Christchurch, New Zealand.

Olsen N.R.B. (2000a): A three-dimensional numerical model for simulation of sediment movements in water intakes with multiblock option. User´s Manual, Norwegian University of Science and Technology, Trondheim.