Calculating hydraulic transient forces is one of the powerful capabilities of PIPENET Transient Module. PIPENET generates a force-time history file which can be imported into CAESARII, where further related calculations can be performed. Our new application bulletin provides a detailed, step by step guide to using the PIPENET-CAESAR II interface, from generating a force-time history file in PIPENET to obtaining calculation results in CAESAR II. The document is divided into 4 parts.
- PIPENET model and the .frc file.
- Preparing for using the interface.
- CAESAR II procedure for importing the .frc file.
- CAESAR II dynamic analysis results.
The overall philosophy of PIPENET – CAESAR II Interface is the following.
During the basic design phase PIPENET Spray/Sprinkler and Standard modules are used for sizing of pipes, selection of pumps and balancing flows. Once the basic design is completed PIPENET Transient module is used for dynamic analysis of how the system would behave when various events take place. It is also used to generate a force-time history. The time history from PIPENET can be directly imported into CAESAR II. This interface gives the ability to predict the stresses and the movements which can arise due to the events, such as valve closure, which take place.
The interface has to overcome two problems and this is done elegantly in the PIPENET – CAESAR II concept.
- The models in PIPENET are essentially in 2D whereas the models in CAESAR II are in 3D.
- The models in PIPENET must include the complete network because in fluid flow a change in one part of the system will have an influence throughout the system. On the other hand, CAESAR II performs a local analysis.
The interface is both simple and elegant.