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Tools for the safe design of components, systems and environments

Simulation is a key part of understanding how safe and efficient water networks can be designed and operated. System simulation allows for utility network design, expansion and overhaul to be assessed before any work is done on the physical system, saving time and money.


Water distribution


As cities around the world grow and new developments spring up either on the outskirts or in more remote locales, it is essential that the utility networks that supply them are well considered: how are they positioned for future growth? Are they as efficient as they could be? Have adequate provisions been made for potential water hammer events?


Flowmaster’s renowned transient solver allows engineers to both identify and suggest solutions to undesirable pressure surges. Its comprehensive component library allows for accurate predictions of pressure drop to be achieved and components appropriately sized.

FloEFD complements this approach by allowing users to simulate individual components such as pumps and valves in three dimensions to obtain more true-to-life performance data; the results can then be easily imported into Flowmaster to further fine-tune the system analysis results.

Water Hammer


Pressure surge, or “water hammer”, occurs when rapid changes to fluid velocity occur in a pipeline system. We most commonly experience it in its most benign form as the ‘knocking’ sound sometimes heard when a domestic tap is quickly closed. However, on an industrial scale, it can be severe enough to cause catastrophic component failure. It is therefore essential that designers of pipeline systems understand the likely pressure response of their networks to planned (normal shut down and check valve operations) and unplanned events (pump/valve failures etc.). This knowledge can be used to select and choose appropriate surge mitigation strategies and devices.

Recommended Solutions

The computational engine that powers Flowmaster is specifically designed to track pressure waves and predict vapor cavity formation in systems. This capability is augmented by a comprehensive component database based upon the industry renowned work Internal Flow Systems. This ensures that accurate pressure predictions are assured at all operating conditions.

Flowmaster contains all the tools an engineer will need to analyze the transient response of a pipeline system: the empirical data that underpins the component library provides unprecedented accuracy, while the method of characteristics solver and cavity prediction tool allow for even the most severe surge events to be readily predicted.

The component library encompasses a range of common surge alleviation devices such as gas admission valves and surge tanks, which allows for the most effective method to be selected and sized from the earliest stages of the design process.

FloEFD offers engineers the opportunity to carry out accurate three-dimensional computer simulations of components without the overhead usually associated with 3D computational fluid dynamics. Embedded within a range of commonly used CAD tools, it uses a unique and well validated approach to solve for even the most complex of geometries in quick time.

The ability to export results from parametric studies in FloEFD affords designers the opportunity to augment the Flowmaster component library with bespoke performance data.



Fluid system CFD for engineers tasked with understanding pipeline fluid and heat flow problems in steady state and transient. Learn more

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