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Two-Phase Fluid Models

Basic two-phase fluid blocks and modeling techniques

Two-Phase Fluid libraries contain blocks for the two-phase fluid 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 Two-Phase Fluid Properties (2P) block, which lets you specify the properties of the working fluid in the connected two-phase fluid loop. The working fluid is assumed to be part liquid and part gas. To model thermodynamic effects in systems where the working fluid is all liquid, use the blocks from the Thermal Liquid libraries. For a complete list of domains available for modeling fluid systems, see Fluid System Modeling.


  • Elements
    Two-phase fluid building blocks, such as chambers, reservoirs, local restrictions, energy converters
  • Sensors
    Two-phase fluid mass and volumetric flow rate, pressure, temperature sensor blocks
  • Sources
    Two-phase fluid mass flow rate, pressure, volumetric flow rate source blocks
  • Utilities
    Basic environment blocks that specify fluid properties
  • Two-Phase Fluid Systems
    Featured examples of two-phase fluid systems