A model must have a number of key components to successfully run a simulation.
Some simple rules for constructing a model are:
- All pipes in a model must be connected at both ends to another pipe, unless connected to the surface or to a tank or a to spray or ‘blanked’ off as a closed end.
- Any fixed flow not restrict another fixed flow elsewhere in a model, or be overly restricted by an impassible high resistance.
Errors contributing to the above conditions account for around 90% of simulation errors and problems noted in Pumpsim™ (from Chasm Consulting observations)
Overview
There are many different ways to build a computer model. Pumpsim™ utilises a visual approach to creating models, and the fundamental structure (shape) of models can be built either by hand with the mouse or imported from a CAD program.
While a model can be built schematically in Pumpsim™, it is highly recommended building a true-to-scale 3D model if possible to allow Pumpsim™ to automatically use parameters such as size, length and depth for simulation. For compressible flow models, this allows for automatic density adjustment and natural ventilation pressure application, resulting in more accurate and realistic results.
The information in this chapter explains only the basic techniques to establishing working models. To create a truly representative model, pipe sizes and resistance must be accurately established and many other important factors such as junctions considered.
For further information:
- Check the Pumpsim™ website (www.pumpsim.com) for newsletters and tutorials.
- Seek a suitable Pumpsim™ training course to undertake advanced training in the product.