Hydraulic libraries contain blocks for the hydraulic domain, organized into elements, sources, and sensors. Connect these blocks together just as you would assemble a physical system. Use these blocks, along with the blocks from other Foundation libraries and the add-on products, to model multidomain physical systems.
The Utilities library contains the Custom Hydraulic Fluid block, which lets you specify the fluid properties in the connected hydraulic loop. These fluid properties are assumed to be constant during simulation time. To model thermodynamic effects, use the blocks from the Thermal Liquid and Two-Phase Fluid libraries.