Fluid containing more than one phases at certain pressure and temperature conditions.
Each phase of the Multiphase Fluid is represented either by a pure substance or by a Fluid Mixture (see Multiphase Fluid vs Fluid Mixture).
This means that some Multiphase Fluids may consist of one pure substance and as such are not Fluid Mixtures.
A typical example is water-steam equilibrium which is a pure substance fluid with two phases (liquid and gaseous).
The most popular multi-phase fluid are:
It is important to remember that multi-phase fluid may collapse to a single-phase state at certain pressure and temperature conditions.
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