This folder tab is only visible when variable properties are being modeled. Variable property modeling is enabled in the Analysis Setup window.

For models with variable fluid properties, you can assign different fluid properties to each pipe in the model. This is convenient for modeling systems that are subject to temperature variations and systems that have multiple fluids. The pipe fluid properties are displayed in the Pipe Properties window, and can be modified by selecting the Fluid Properties button. Besides varying the fluid properties, the viscosity model can varied from pipe to pipe. Thus, some pipes in the model can be modeled as Newtonian, with others as non-Newtonian.