Dhi Mike 21 Jun 2026

DHI MIKE 21 is the industry-standard software suite for modeling hydrodynamics, waves, sediment transport, and water quality in coastal and marine environments. Developed by DHI (formerly the Danish Hydraulic Institute), this advanced 2D surface flow modeling tool simulates physical processes in oceans, estuaries, bays, lakes, and coastal areas. Engineers, researchers, and environmental consultants worldwide rely on MIKE 21 to solve complex hydraulic challenges and design resilient coastal infrastructure. Core Engine and Grid Types

The classic Cartesian grid divides the modeling domain into equal square cells. It is highly efficient for simple geometries, open ocean modeling, or large-scale simulations where high resolution along complex shorelines is not critical. Flexible Mesh (FM)

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At its core, MIKE 21 is more than just a software suite; it is a numerical laboratory that solves the Reynolds-averaged Navier-Stokes equations dhi mike 21

This is the core module, simulating water levels and flows in response to wind, tide, and other forces. It is used to analyze tidal circulation, flood extent, and storm surges [5.4].

Simulates the growth, decay, and transformation of wind-generated waves and swells in both offshore and coastal regions. It accounts for wave breaking, refraction, shoaling, and reflection.

The core of the system, used for tidal circulation and current analysis in estuaries, bays, and lakes. DHI MIKE 21 is the industry-standard software suite

: Uses a structured, orthogonal rectangular grid suitable for straightforward bathymetries.

MIKE 21 simulations are computationally intensive, especially when running Flexible Mesh models with fine resolutions. DHI has optimized the software to utilize modern computing architectures:

Rising sea levels require robust coastal defenses. MIKE 21 simulates storm surges and wave overtopping. Engineers use this data to design breakwaters, seawalls, and revetments. It also models beach erosion to determine the longevity of beach nourishment projects. 2. Port and Harbor Design Core Engine and Grid Types The classic Cartesian

This module predicts the movement of non-cohesive sediments (sand) and cohesive sediments (mud/silt).

MIKE 21's enduring position as the world's leading modelling package for 2D free surface flow is no accident. Its power comes from the seamless integration of through GPU parallelisation and new releases like MIKE 2026.