gPROMS v3.2: modelling, usability and solution power
Powerful custom modelling in a flowsheeting environment
We are pleased to announce the release of gPROMS version 3.2.

V3.2 builds on the new functionality in the previous v3.0 and v3.1 releases, refining and completing some of the many features introduced with the new gPROMS v3 architecture. This takes PSE's aim of providing the world's most powerful custom modelling within a flowsheeting environment a significant step forward.

Apart from the numerous productivity, speed and robustness enhancements, v3.2 contains significant enhancements to the ability to handle discrete logic within the equation-oriented modelling environment, as requested by a number of customers over the years.

Building on gPROMS' already strong capabilities for modelling and optimising both complex physics and discrete operating procedures, each physical model can now invoke discrete logic that is automatically triggered for every instance of the model included in a flowsheet. This allows, for example, gPROMS library models to include sophisticated supervisory controllers, whose execution is completely transparent to end-users.

There are a number of usability enhancements aimed at simplifying the creation and maintenance of complex flowsheets. These range from minor improvements such as the ability to align flowsheet elements to the ability to use text array indices consistently throughout gPROMS, including dialogue specifications.

v3.2 contains significantly-enhanced diagnostics that make information more easily accessible both for model developers and users. These include facilities for diagnosing over-and under specification and making intelligent suggestions for the choice of specification variables. There is improved analysis and assistance for numerical failures during execution, as well as improved information at the flowsheet level during model construction.

For results presentation, a new data export facility provides semi-automated selective export of variables to postprocessing facilities such as MS Excel for - for example - pivot table analysis. In addition to providing formatted output and addition calculations, this helps reduce model size and execution time.

Emphasizing the fact that PSE's development continues to focus on the underlying solution technology for which gPROMS is renowned, there have been some significant enhancements to solution power and efficiency.

Exact model reduction techniques to eliminate inessential equations and variables during solution mean that many classes of problem now run 20% faster than in previous versions and use less memory. Examples from testing to date are a parameter estimation problem that ran in half the time taken in v3.1.5, a typical 20% reduction in memory footprint and, in one case, a reduction in the number of variables by a factor of 40% and simulation time by a factor of 35%.

These improvements allow increases in the number of discretisation points used, in order to improve accuracy, or increases in complexity of flowsheets, while keeping simulation times and memory requirements within acceptable limits.

On the CFD front, an extended Hybrid Multizonal interface now supports FLUENT® multiphase models with or without energy conservation, FLUENT dynamic simulations in two-way mode, FLUENT 2-D models and FLUENT parallel processing in either one or two-way mode.

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