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Why MIKE 21 Curvilinear Flow Model?

Perform complex studies of river dynamics over different time scales

The modular MIKE 21 Curvilinear Flow Model (MIKE 21C) is ideal for river morphology studies as it supports both standalone hydrodynamics or combined hydrodynamic and sediment transport simulations. This enables users to accurately describe flow dynamics, helical flow (secondary currents), sediment transport, alluvial resistance, scour and deposition, as well as bank erosion and planform changes – with one platform! You can also run these modules in tandem by incorporating feedback from variations in alluvial resistance, bed topography and bank line geometry to the hydrodynamics.

Hindcast of Jamuna River morphology during the first monsoon following the construction of the Jamuna Bridge cross dam
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Grid and bathymetry for the Gorai River (Bangladesh), which is an offtake from the Ganges River

Technical note: The grid generator uses anisotropic conformal mapping with a single structure grid allowing fast simulations.

Accurately describe bank lines using the specialised MIKE 21C Grid Generator interface

Create detailed representation of rivers and channels with the user-friendly MIKE 21C Grid Generator. This built-in tool allows you to resolve areas of special interest using a higher density of grid lines. Create and modify Grids that contain important model bathymetry, bed resistance data and more with MIKE 21C’s map-based interface.

Model mixed sediments ranging from silt and clay to sand and gravel

With MIKE 21C, you’re not limited to just non-cohesive sediment transport modelling. Apply graded sediment descriptions by defining multiple sediment fractions. These are both individually and highly customisable in the sediment transport module. Graded sediment studies are not fundamentally different from single sediment fraction studies, but the graded sediment model is required when:
 

  • The sediment size spectrum cannot be represented by a single size class (fraction)

  • A single size class can have different properties, e.g. contamination or densities

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Graded sediment in the Coeur D’Alene River (Idaho). Sizes range from clay to medium sand (four cohesive and three non-cohesive fractions) each divided into clean and lead-contaminated, i.e. 14 sediment fractions. The model is fully dynamic and runs several years in days.