2D and 3D coast & sea modelling

Accurately simulate the full range of physical, chemical or biological processes in coastal or marine areas with the most versatile collection of 2D and 3D modelling tools.

Why choose MIKE 21 and 3?

To combat modern day environmental challenges, professionals need to efficiently transform model results into sustainable engineering solutions. No other 2D modelling package has been used for as many coastal and marine engineering projects around the world as MIKE 21. MIKE 3 builds on the same solid technology as MIKE 21 yet allows you to expand your modelling capabilities to include 3D free surface flows and associated sediment or water quality processes.

Assess any coast and sea concern

Hydrodynamics, waves, sediments, water quality and ship movements - you can model it all. No other modelling suite comes close to this range of application.

Create exactly the model you need

Pick and choose from a selection of specialised modules to create a custom modelling framework. Tackle the most complex studies by coupling MIKE 21/3 with other MIKE software.

Produce high quality work in less time

Enjoy easy access to data and a wealth of first class modelling tools to boost your productivity. Advanced parallelisation techniques for multi-core and GPU modelling allow you run fast simulations.

Have full confidence in your model results

When accuracy matters most, count on MIKE. Trust your modelling results to the premiere, science-based software platform developed by professionals, for professionals.

Get started with these integrated core modules

Advanced data processing and visualisation tools come standard with MIKE 21 and 3. Start building models today with the integrated hydrodynamic module for sediment transport simulations and studies of spreading, dispersion and water quality.

Transform raw data into an understandable format

Preprocessing & Postprocessing

Begin your data visualisation journey with an integrated work environment and compatible routines to ease data input, analyses and presentation of results.

        • Create efficient model mesh using mixed elements
        • Convert wave spectra data into model format
        • Generate 2D time-varying hurricane or cyclone wind forcing files to perform storm surge modelling and more

Model hydrodynamic processes in 2D and 3D


Simulate water level variations and flows in response to a variety of forcing functions with integrated 2D and 3D modelling of hydrodynamic processes.

      • Assess hydrographic conditions for design, construction and operation of structures
      • Seamlessly represent storm surge caused by wind and pressure
      • Use for any 3D free surface flow
      • Simulate wave driven currents

Next, choose from a selection of specialised modules

Take advantage of the modular structure of MIKE Powered by DHI software for the most advanced functionality and maximum flexibility. Pick and choose which applications are best suited for the nature of your work and intended outcome. Alternatively, select from one of our pre-bundled software subscriptions.

Agent-based modelling


Simulate the dynamic behavior of aquatic life and their interactions with the environment

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2D wave modelling

Boussinesq Waves

Analyse wave disturbances in ports, harbours and coastal areas

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3D phase resolving model

MIKE 3 Wave FM

Analyse the impact of a wave climate on offshore, coastal or port infrastructure

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Ecological modelling


Investigate water quality concerns and their potential ecological impact

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2D dynamic mooring analysis

Mooring Analysis

Assess the dynamic effects of wind, currents and waves on moored vessels and other floating structures

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2D/3D mud transport modelling

Mud Transport

Study the impact of siltation on coastal morphology and water quality

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2D/3D oil spill modelling

Oil Spill

Quantify and visualise the risks and potential impact of an oil spill on the environment

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2D/3D particle transport modelling

Particle Tracking

Assess the potential impact of dredging, disposal and reclamation activities

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2D/3D sediment transport modelling

Sand Transport

Analyse the effects of sedimentation on coastal and estuarine infrastructure

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2D morphological modelling

Shoreline Morphology

Model complex sediment transport processes and shoreline morphology

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2D spectral wind-wave modelling

Spectral Waves

Predict and analyse wave climates in offshore and coastal areas

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2D/3D transport modelling


Model the spreading and fate of tracers, coliform bacteria and xenobiotic compounds

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Watch how easy it is to create and run a MIKE 21 HD model

Additional capabilities & unique features

You can now access MIKE 21 and MIKE 3 on Azure Marketplace, where you can start modelling in the cloud with no hardware limitation in four simple steps. Learn more

• Single Grid, which is a classic rectilinear model that is easy to set up and with easy I/O exchange
• Multiple Grids, which is a dynamically nested rectilinear model with the ability to focus the grid resolution
• Flexible Mesh, which allows maximum flexibility for adapting grid resolution of the model domain

All Flexible Mesh and Single Grid engines support parallel processing. The Flexible Mesh (FM) engines show excellent performance when parallel processing is undertaken – also on a large number of computational cores. On multicore Windows computers, parallelisation is menu-driven and straightforward. The FM engines are also available for Linux, which gives the possibility to utilise High Performance Computing (HPC) systems. For the FM engines, the use of graphical processing units (GPU) is also supported and gives easy access to spectacular increases in simulation speed.

In addition to its variety of modules, MIKE 21/3 also includes a number of tools to optimise your work.
• Global tide data and tools for tidal analysis and prediction
• MIKE’s Climate Change Editor
• Cyclone wind generation and wind generation from pressure maps
• Advanced mesh and grid generators and editors
• Advanced tools for generation of graphical output
• An interface (API) for reading and modifying files in MIKE 21 or MIKE 3’s internal, binary format

MIKE C-Map offers model bathymetries generated fast and easy from an electronic chart database. MIKE ANIMATOR PLUS turns model results into amazing 3D video presentations.

MIKE 21 and 3 offer a choice of rectangular grid, nested grids or flexible meshes. This provides an optimal degree of flexibility in the representation of complex geometries and enables smooth representations of boundaries.

Well-functioning parallelisation techniques makes multicore execution efficient. Speed is further enhanced through the integrated use of GPU’s, engines that can execute under Linux and the possibility for execution under Microsoft Azure.

The FM series include a powerful, integrated system which, in a surprisingly easy manner, combines wave, flow and sediment transport models into a fully dynamic morphological model.

Create high quality boundary conditions automatically in a matter of minutes. This advanced online tool is a free premium feature for our SMA customers – Try it out today: https://boundary-generator.dhigroup.com

The MIKE3 flexible mesh hydrodynamics (HD) module includes both a non-hydrostatic (Navier Stokes equation) and hydrostatic (shallow water equation) solver. For modeling of internal wave generation due to density variation for example, the non-hydrostatic version is essential for capturing the correct behavior of the flow.

Model culverts, weirs and dikes to improve the accuracy and efficiency of morphodynamic simulations.

The simulation of outfall jets/plumes in a 3D environment is based on dynamic coupling of nearfield integrated jet solution and the farfield hydrodynamic flow model. This enables a user to accurately calculate the jet trajectory and rate of dilution in the nearfield region and incorporate the jet discharge into a Farfield flow model.

Both the full 3D Navier-Stokes equations (non-hydrostatic) and the 3D shallow water equations (hydrostatic) can be applied. Thus, the model consists of continuity, momentum, temperature, salinity and density equations and is closed by a turbulent closure scheme. The spatial discretisation of the governing equations is performed using a cell-centred finite volume method on triangular , quadrangular or mixed element domains, employing a shock-capturing Riemann solver to ensure robust and stable simulation of flows.

Accomplish this by making integrated near field-far field calculations with the Jet source.

Couple your coastal model with river channel and urban drainage networks to gain a more comprehensive understanding of the potential impact of coastal flooding on a community.

Integrated salinity and heat balance modules are included for coastal inundation simulations.

This capability makes MIKE 21 and 3 particularly applicable for global and regional sea scale applications.

If you are not yet an expert in 3D modelling, you do not have to go far for assistance. Expert support is available from any of our more than 30 offices around the world. It also gives access to other benefits of MIKE software products, including unparalleled technical support, training courses and access to DHI’s expertise and know-how regardless of where you are in the world.

Ready to get started?

Request a free trial of MIKE 21 or MIKE 3 or ask us for more details on how your project can benefit from this complete coast and sea modelling software package.