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BEMATA-Beregningsorientert matematikk i anv.

Modelling of meandering river evolution using CFD

Awarded: NOK 1.6 mill.

The project will build on already existing state-of-the-art 3D CFD models for river flow and sediment transport. The models solve the Navier-Stokes equations with the k-epsilon turbulence model to compute the water flow. The convection-diffusion equation for sediment concentration is also solved, enabling estimations of bed changes in the geometry. An unstructured dynamic grid is used, with wetting/drying algorithms. This enables the river bed to move vertically and the river banks to move laterally. In t he project, data for meandering rivers will be used to test the model. A large number of flume studies have been made, with different water discharge, slope, sediment characteristics etc. The CFD model will be tested for these cases and assessments of its usability to compute meander wavelength, simousity, width/depth characteristics and meander movement velocity. Where the results are not satifactory, the algorithms will be improved and new algorithms will be made.

Funding scheme:

BEMATA-Beregningsorientert matematikk i anv.

Thematic Areas and Topics

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