The arrows were bending sharply around the northern jetty. They weren't dissipating; they were focusing. The wave energy was refracting off the newly placed concrete armor units, creating a focused beam of kinetic energy pointing directly at the secondary dock.
Used for sand and mud transport, this module helps predict morphological changes like beach erosion or harbor siltation. dhi mike 21
: The engine simulates factors such as bottom shear stress, Coriolis force, momentum dispersion, and wind fields. MIKE 21-3 | Coast and Marine Water Modelling Software - DHI The arrows were bending sharply around the northern jetty
The DHI Mike 21 software has been used in numerous real-world applications around the world. Some examples include: Used for sand and mud transport, this module
At its heart, MIKE 21 is a two-dimensional, hydrodynamic modeling engine. Unlike simpler one-dimensional models that simulate flow only along a river channel, a 2D model solves the depth-averaged Navier-Stokes equations (specifically the Saint-Venant equations for shallow water). This means it simulates how water moves both horizontally across a landscape and through time, accounting for variations in depth, velocity, and direction. The software’s flexible mesh technology—most notably its use of a non-structured, cell-centered finite volume method—allows it to represent complex, irregular coastlines, islands, and man-made structures with far greater precision than traditional rectangular grids. This adaptive mesh refines resolution in areas of interest (e.g., around a bridge pier or a narrow inlet) while maintaining coarser resolution in deeper, less critical zones, balancing accuracy with computational efficiency.
The core engine that simulates water level variations and flows in response to forcing functions like tides, wind, and river discharge.