Using the Flood & Drain model you can simulate two-phase flow conditions that occur when rapidly flooding (fire water) systems and when purging a system from a liquid with a gas. The model is unique in that it can handle large and complex piping systems without requiring very long calculation times.
In BOSfluids 8.0 the Flood & Drain model has been improved so that it accounts for significant friction losses in the gas phase. Previously, the pressure would be uniform throughout a single gas volume, even when that volume was passing through an inline restriction such as a (check) valve or orifice plate. With the latest improvements, however, a gas volume will be split into two separate volumes if it passes through such a flow restriction. The two volumes are then connected by a virtual gas nozzle that is used to calculate the friction losses in the gas phase, both for sub-critical and critical gas flow conditions.
The Flood & Drain model has been further extended with an explicit coupling between the opening state of a check valve, the gas flow through the valve, and the liquid flow conditions at the boundaries of a gas volume. This results in a much more accurate prediction of the pressure distribution when a gas volume passes through a check valve.
With the improved Flood & Drain model BOSfluids can simulate two-phase flow conditions with a higher degree of accuracy without a noticeable loss in efficiency. Indeed, the improved model has already proven itself in large-scale simulation of complex fire water systems.
Check out the rest of the release highlights:
- Unified application data model
- Support for NFPA analyses
- Support for modeling reciprocating equipment
- Addition of a PIPENET file import interface
- Extension of special flow elements
- Improved cavitation models
- Improved and more efficient user interface
- Other improvements
For more information:
- Learn more about BOSfluids
- Schedule a demo to see BOSfluids in action