Fluid which may develop containing more than one phases at certain pressure and temperature conditions.
The most npopular
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 collpase collapse to a single-phase state at certain state at certain pressure and temperature conditions.
For example, a 2-phase oil + gas fluid may degrade to single-phase state when pressure goes up above bubble point.
See also
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Natural Science / Physics / Thermodynamics / Thermodynamic system / Phase