The Surge Analysis Tool of Choice

Surge Analysis Made Easy

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.


Water Hammer Analysis

In case of an emergency, one or more ESD (Emergency Shutdown) valves may need to close immediately. The rapid closure of these valves can cause significant fluid induced forces on the attached piping system, a phenomenon known as water hammer.
With BOSfluids you can analyze the maximum surge pressure, find the dynamic forces working on the piping system and use these forces to perform a structural analysis using the structural interface with a third-party structural stress solver.

Line Sizing for Process Industry

Line sizing is an important first step for any piping system. BOSfluids offers an excellent steady state flow solver with the optimalization features a process engineer needs.
Since BOSfluids includes both a 2-D network viewer and 3-D piping viewer, any BOSfluids model file is ready to perform a pressure surge analysis and even pipe stress analysis in later engineering stages.
Ask us for more information on the BOSfluids Steady State license for an economical engineering solution.

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.

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 the valve closure time on the maximum surge pressure peak, you would only need to change this single parameter in the scenarios and you can compare the impact of this in the output processor.

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.

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.

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.

Licence Options

The Steady State license gives access to  the robust, fast and accurate steady state compressible flow solver that can handle systems filled with liquids or gases.
The full BOSfluids user interface is available, including the ability to build and view a piping model both as a 2-D network and as a 3-D model and the option to perform optimalisation runs using symbolic parameters.
The full transient license continues to support all features of BOSfluids like pressure surge analyses, flood & drain and fluid-structure interaction including the 2-D network viewer and the additional steady state features.
Perform transient analysis with the fast transient flow solver and use the structural interface to analyze fluid-structure interaction using a third-party structural solver.

Feature Overview

Steady Licence
Transient Licence
Model builder (number of items not limited)
Model importer (CII, Epanet, PCF, etc)
Scenario builder
2-D network viewer and modeler
3-D piping models and interface
Model properties viewer
Valves including valve operations
Water/gas hammer events
Pumps including operations
Pump Failure
Fluid and material database
Compressible fluids (gasses)
Incompressible fluids (liquids)
Run analyses on multiple cores
Control systems
Bill of Quantity report
Definition of custom data sets
Parametric analysis
Pressure and (quasi) steady flow analysis
Pressure surge analysis
Formation and collapse of vapor cavities
Cavitation Index prediction
Two phase flood and drain analysis
Combined fluid-structure analysis
Tube rupture analysis
Liquid flashing and choked flow
Hydrodynamic force calculation
[*] Implies the presence of a third-party structural solver