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2D Solvers

Take advantage of one of the fastest GPU solvers available to accurately model fluvial, overland, estuarine and coastal flows

Flood Modeller provides four powerful CPU- and GPU-enabled 2D solvers to achieve quick, accurate and robust hydraulic simulations. They have been specifically designed to accurately undertake local and catchment scale modelling, surface water analysis, flood mapping, embankment and asset failure assessments, amongst a wide range of other applications.

2D ADI Solver

Calculates water depth and velocity where the flow is not rapidly changing

2D TVD Solver

Calculate complex hydraulics more accurately using our shock-capturing solver

Professional and Unlimited

editions only

2D GPU Solver

Run simulations up to 96% faster, enabling more accurate and detailed results

Professional and Unlimited editions only

2D FAST Solver

Rapidly estimate large scale (national) flood extents in minutes using simplified hydraulics

Flood Modeller’s 2D solvers calculate water depths, velocity and flow paths and can be used as a standalone solution to calculate flood risk. They can also be dynamically linked to the 1D river and 1D urban solvers to enable integrated catchment modelling for better understanding of flood risk in urban areas


You can explore 2D results in the core map interface, overlaid on the built-in background mapping alongside any other contextual layers. The built-in animation functions enable you to view and record a complete picture of your model results. Alternatively, export flood extents for inclusion within reports or third-party tools such as Google Earth.

Multiple Domains

Incorporate multiple 2D domains, with varying cell sizes and resolution.

Embedded Structures

Embed structures directly into your 2D domain, removing the need for a 1D model.

Link Line Generator

Automatically

link your

1D river network to your 2D model domains.

Flood
Cloud

Run your model simulations faster with our on-demand cloud computing service.

Background Mapping

Use background mapping or your preferred web mapping/feature service.

2D ADI Solver

Confidently model fluvial, overland and coastal flow


First developed in the 1980s, the 2D ADI solver allows you to confidently model fluvial, overland and coastal flow and is very efficient, both in terms of processor time and memory. It represents the 2D domain as a grid of square cells and calculates the discretised shallow water equations by sub-dividing the computation at each time step. 


Water levels are calculated at each cell centre, and the two components of velocity at cell edges. This allows the model to use the velocity components to calculate flow across cell edges and between cells.


The ADI solver includes special methods for modelling direct rainfall, allowing you to calculate rainfall distribution across your catchment.

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2D TVD Solver

Accurate and stable results for complex 2D hydraulics 


The 2D TVD solver provides an accurate representation of rapidly varying flow, where hydraulic jumps may occur. It is capable of modelling trans-critical flow in applications such dam breach, modelling very steep catchments or flow down spillways.


The solver discretises the shallow water equations in a slightly different way to the ADI solver, as flows are represented at the cell centres, rather than at the edges. It uses predictor and corrector steps to compute depth and flow at the new timestep. A TVD term is then applied to the predictor and corrector steps to remove numerical oscillations near sharp gradients – providing more stable results.

2D GPU Solver

Access detailed 2D modelling results fast


The 2D GPU solver has redefined the standard for speed and accuracy using the very latest in GPU acceleration techniques. It uses the same underlying mathematics as the original TVD solver, allowing the same outputs to be obtained, just significantly faster! 


The solver doesn’t require high-specification graphics cards and provides faster (up to 96%) runtimes using a standard laptop GPU. It allows you to enhance your outputs, by developing models with finer grid resolution and wider extents, enabling more accurate and detailed results.

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2D FAST Solver

Quick assessment of flooding using simplified hydraulics


The 2D FAST solver is designed to allow rapid assessment of flooding using simplified hydraulics. It provides results in seconds or minutes, as opposed to hours or days, and allows flood risk ‘hot spots’ to be quickly identified for more detailed and focused analysis to be undertaken.


The solver identifies depressions on the floodplain and routes water through them. Water depths in the depressions are determined by the volume of water flowing into each one and the water level in the neighbouring depressions. 

 
 
 
 

Upcoming courses

Manchester

22nd November 2022

Introduction to 2D modelling

£350

Enquire now

Online Course

25th & 26th January 2023

Introduction to 2D modelling

£350

Enquire now

Manchester

29th March 2023

Introduction to 2D modelling

£350

Enquire now
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