Dhi Mike 21 Jun 2026

The versatility of MIKE 21 has made it indispensable across multiple industries. Here are typical use cases:

: Ensure your GIS data matches the MIKE 21 orientation. MIKE 21 assumes zero rotation at the origin relative to True North, whereas GIS assumes zero rotation relative to the projection axis.

A defining feature of the modern MIKE 21 suite is its approach. Unlike traditional rectangular grids, the flexible mesh uses triangular or quadrilateral elements of varying sizes. This allows for a more accurate representation of complex coastlines and bathymetry, placing higher resolution only where needed to optimize computational efficiency. Modular Versatility

is a comprehensive, professional engineering software package developed by DHI (Danish Hydraulic Institute) for the simulation of free-surface flows , waves, sediments, and water quality in oceans, coastal zones, estuaries, rivers, and lakes. It is part of the broader MIKE Powered by DHI software ecosystem. dhi mike 21

Are you interested in the behind the software?

| Module | Purpose | Key Outputs | | :--- | :--- | :--- | | | Water levels, currents, and fluxes. | Water level (h), velocity (u,v), discharge. | | SW (Spectral Waves) | Wind-wave growth, propagation, and dissipation. | Significant wave height (Hs), peak period (Tp), wave direction, radiation stresses. | | MT (Mud Transport) | Cohesive sediment (silt/clay) erosion, transport, and deposition. | Suspended sediment concentration, bed level change, flocculation. | | ST (Sand Transport) | Non-cohesive sediment transport, bedload, and suspended load. | Bedload rate, suspended concentration, dune migration. | | MA (Morphological Analysis) | Long-term seabed evolution (coupling HD+SW+MT/ST). | Bathymetry change over days to decades. | | ECO Lab (Water Quality/Ecology) | Customizable water quality, eutrophication, heavy metals, and ecological processes. | DO, BOD, nutrients (N,P), algae biomass, pH. | | Particle Tracking | Advection-dispersion of neutrally buoyant particles, oil spills, or larvae. | Particle trajectories, concentration, residence time. |

The Danish Hydraulic Institute (DHI) is continually updating and improving the Mike 21 software to reflect the latest advancements in hydrodynamic modeling and water-related research. Some future developments include: The versatility of MIKE 21 has made it

The Classic engine utilizes a Cartesian grid where the study area is divided into uniform square cells. This grid setup is highly efficient for localized, structured environments like small harbors, simple channels, or straightforward laboratory flumes. While computationally fast, it can struggle to smoothly map highly irregular or curved coastlines without using very small, resource-intensive cell sizes. 2. MIKE 21 FM (Flexible Mesh)

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What is the you are planning to model?

The computational core of MIKE 21 solves the depth-averaged, incompressible equations, strictly adhering to the conservation of mass and momentum. Users can configure their spatial domains using three distinct structural setups:

The Flexible Mesh version utilizes unstructured grids composed of linear triangles or quadrilaterals. This allows for variable spatial resolution. Users can generate dense, high-resolution meshes around intricate structures, harbors, or narrow channels while maintaining a coarser mesh in the open sea to optimize computational time. Key Modules of MIKE 21

MIKE 21's global credibility is validated by its application to complex environmental and engineering projects. A defining feature of the modern MIKE 21