Updated Fluids Library

If the data in a shared fluid library is changed outside of the model you are opening, the following informational message will appear when opening the file:

The following fluid(s) used in the scenario have different property data than what is currently in the library:

There are a few reasons that the fluid data may have been changed:

1. The model was defined in a previous version of Arrow using a fluid from the AFT Standard fluid library. Saturation line data was added to the AFT Standard fluid library in AFT Arrow 9. It is recommended to use the "Change to Base Scenario and update..." option to update the fluid properties throughout the model with the saturation lines. If different scenarios use different fluid properties then it is recommended to load the parent scenario and use the "Update fluid(s) from library in the scenario" option, then load each child scenario that has a different fluid individually and update the fluid.

   The only change made to the fluids was to add saturation line data in order to identify if the gas may be condensing in the actual system. AFT Arrow cannot account for two-phase flow as would actually occur if the fluid properties dropped below the saturation line; however, AFT Arrow will warn the user if the saturation line is reached. Due to the fact that two-phase flow is not being calculated, the addition of the saturation lines will not change the numerical results in the model, but may result in new warnings being shown.

2. The model is defined with a custom fluid in the Fluid Library and the custom fluid was modified outside of this model. If the fluid was changed in error, then choose the "Keep using the fluids defined in the scenario" option or cancel loading the model and change the fluid. If the changes were intended then update the fluid data used in the model using the "Change to Base Scenario and update..." option.