The Surge Analysis Tool of Choice

BOSfluids 6.2 Out Now

BOSfluids enables you to perform surge analyses in an interactive and visual way, giving you lots of opportunities for exploring your problem space fast and efficiently.
BOSfluids is actually more than a surge analysis tool as it can simulate general steady state and transient flow conditions in piping systems, and help you perform coupled fluid-structure analyses. 

Developed by engineers, for engineers


More than 30 years of experience with surge analyses has been incorporated in BOSfluids and and we are committed to continue doing so in every new version of the software.

Because BOSfluids works with 3-D piping models you can directly correlate your model with the actual piping system, helping you avoid making mistakes. What is more, 3-D models result in accurate predictions of the magnitude, direction and exact location of the unbalanced fluid forces. This makes BOSfluids an ideal tool for combined fluid-structure analyses.

BOSfluids is one of the most efficient surge analysis applications available on the market. It is at least 10-100x times faster than most other applications which gives you great benefits: significant time savings, analyses of much larger models, and the simulation of many scenarios at once.  

BOSfluids comes with advanced surge analysis technology that enables you to perform accurate transient analyses, combined fluid-structure analyses, two-phase flood and drain analyses, control system simulations, tube rupture analyses, pump failure simulations, automatic orifice sizing, and much more. BOSfluids can handle systems filled with liquids and gases, and comes with a flexible components database.

BOSfluids is designed to interact with other software packages. It can import and export piping models in common formats, including PCF and EPANET. It can also export unbalanced forces to various structural analysis programs, including CAESAR II, ANSYS and AutoPIPE. When exporting to CAESAR II, BOSfluids can set up everything that is needed to perform a dynamic structural analysis..


Quasi Steady State Solver

Quasi Steady State Solver

The quasi-steady state solver is based on a non-linear, implicit solution method that takes the compressibility of gases into account. The solver essentially calculates a series of steady state solutions and is aimed at the analysis of slowly evolving flow conditions over long time periods.

Transient Flow Solver

Transient Flow Solver

The transient solver is aimed at the analysis of fast-changing transient flow conditions. This solver uses the method of characteristics to solve the time-dependent and non-linear flow equations in a robust and very efficient way. It implements models for simulating the formation and collapse of vapor cavities in liquids so that it can accurately predict the resulting pressure waves in the piping system.

Coupled Fluid-Structure Analysis

Coupled Fluid-Structure Analysis

BOSfluids can accurately predict the dynamic, fluid-induced forces acting on the piping system. That is, BOSfluids can predict the time-dependent magnitude, location and direction in which the forces act. Not only that, with BOSfluids you can perform a coupled fluid-structure analysis with a supported structural solver.

Steady State Impact Analysis

Steady State Impact Analysis

The steady state solver enables you to assess the impact of system changes on the steady state process conditions. It can be used to determine the optimum size of orifice plates, pumps and other equipment. It can also be used for line sizing and layout optimization, and other types of parameter studies.


Two-Phase Flood & Drain Analyses

When an empty firewater system is filled during a fire situation, it can be subjected to significant loads resulting from the liquid interface moving through the system. Indeed, there have been multiple incidents involving firewater systems in which these forces caused significant damage to the piping system.
The two-phase Flood & Drain model implemented in BOSfluids can be used to simulate the rapid filling of empty, or gas-filled, piping systems. This makes BOSfluids a unique and effective tool for predicting and mitigating the forces that are exerted by the liquid on the piping system.

Pump Failure Simulations

Pump failure events, involving a sudden loss of power to one or more pumps, can lead to pressure surges and flow conditions exceeding the design specifications of a piping system.
A detailed pump failure model is available in BOSfluids that predicts how a pump spins down after its power has been cut.

Flow Control Systems

BOSfluids provides extensive support for simulating automatic control systems that adjust flow elements in response to changes in the flow conditions or to external events, such as timer switches.
This means that you can use BOSfluids to set up, tune and assess control systems in a virtual way so that you can save time and costs, and reduce the risk of affecting a operational system in a negative, or even damaging way.

Multiple Scenarios in One Model

A scenario can be viewed as a context or scope in which the model parameters are defined. Multiple scenarios can be defined in order to study different variations of the piping model. For instance, if you are interested in the effects of an orifice diameter on the flow and pressure distribution you could define multiple scenarios specifying different diameters and compare them together in a single graph.

Tube Rupture Simulations

Tube rupture in a tube-and-shell heat exchanger can lead to over pressure situations in the shell or the tubes. The tube rupture model implemented by BOSfluids can be used to simulate the discharge of a high-pressure gas or liquid from one or more ruptured tubes into a low-pressure shell. The model supports phase transitions due to flashing, and also accounts for pressure losses within the tubes and for pressure changes due to temperature changes.


Save time & money

Looking for
Pulsation Analysis?

Boost Your Knowledge

Learn all about the effects of pressure surges on piping systems and how to perform a Surge Analysis using BOSfluids.

License Options

You can choose between time-limited licenses (three months or one year) and perpetual licenses, and you can choose between cloud-based network licenses and hardware-based local licenses. A cloud-based license requires a working internet connection in order to use the software. A hardware-based license involves the use of an USB dongle that must be connected to the computer on which the software is used. Note that a perpetual license implies a hardware-based local license. Also note that BOSfluids will keep working in demo mode when your license has expired. This means that you can still open your models and view the results.