Simulation Engine

"The leading software solution integrating asset and business planning with urban drainage network modeling"

The InfoWorks CS simulation engine is world renowned for its speed, and for the unparalleled control it gives the user throughout the simulation process. We detail below the reasons why it is the industry-leading solution.

Purpose built for Wastewater Networks

Developed specifically for the analysis of Wastewater Networks, it is equally applicable to the associated disciplines of Wastewater Treatment Works and simple River Channels, and is the subject of continuous enhancement.

Benchmarks show it's the fastest

Benchmark speed testing against other simulation engines shows InfoWorks to be significantly faster than any other wastewater engine (up to twice as fast as its closest competitor). The performance level is due to the unique way in which the simulation proceeds:

• Integration of Hydrological and Hydraulic simulation (i.e. one process).



• Automatic selection of the optimum simulation time-step, based on convergence tolerances for flow and depth at previous time-step (i.e. always uses the optimum time step).



• Automatic switching to a much larger simulation time-step for 'Dry Weather' conditions, giving very fast processing of these conditions without loss of accuracy.



• Option to switch between 'pressurised flow' and 'full solution' algorithms for manifolded pipes, rising mains, and any other pipes that are known to always be in a fully surcharged condition. This has the effect of dramatically increasing the simulation speed for the model as a whole.

Accurate "real world" modeling

Real world conditions are modeled right from the start of the simulation process. The initial conditions, both on the ground and in the pipes, are automatically re-set at the start of each simulation. The simulation then proceeds, maintaining the stability of the flows, depths and velocities throughout the system at each time step. This process is achieved by:

• Proper, initialisation of all hydraulic parameters before the start of the actual simulation (i.e. stable initial Flows, Depths and Velocities).



• Mathematical solution using the Priessmann 4-point scheme to approximate the Saint Venant equations.



• The stability of the calculations, particularly in the transition between pressurised and free surface flow, is ensured using the non-linear Newton-Raphson iteration and adaptive time-stepping algorithm.

Proven in thousands of projects

The engine has proved itself on thousands of network analysis projects world wide since its original development and is being continuously improved as new releases of InfoWorks CS are made. An increasing number of users are realising the productivity benefits of InfoWorks CS compared to 'standard' modeling engines.

In Summary

• InfoWorks CS engine comes from a long pedigree of development and improvement and is the leading edge simulation engine for wastewater and stormwater modeling.



• The engine is a unique bespoke application for wastewater modeling, and does not suffer the inherent restrictions of modeling based on 'shareware'.



• Benchmark testing has shown the InfoWorks CS engine to be up to twice as fast as its closest competitor.



• Real world behaviour is modeled throughout the package rather than relying on simplified representations of hydraulic behaviour defined in terms of a head/discharge relationship.



• The modeler has far greater control of the Simulation's progress in terms of simulation tolerance, diagnostic feedback and general 'health' of the simulation.



• The engine is continuously being improved and developed in line with the InfoWorks CS release programme.