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Fig.A-9
Typical surface of equilibrium states: Solid, liquid, as well as gaseous phase exist only within a given range of state parameters. Values of two parameters (e.g. temperature and pressure) determine in a unique manner the third one. There is an additional degree of freedom in phase transition regions (melting, evaporation, sublimation). | |
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Fig.A-10 Division of fluid mechanics into particular branches according to the value of Mach numbers, en- countered in a given branch. Mach number expresses the relative influence of compressibility. |
v
(volume increases
by nearly 3 decimal orders during evaporation) but the slope of the surface is much lower.
Compressibility of gases is usually
v = konst
may solve many problems of gas flow, which is
otherwise a subject of interest in
aerodynamics (Greek "aeros" = air, "dynamikos" = force ) - it is evidently possible
as long as the changes of pressure
click
Vaclav TESAR : "BASIC FLUID MECHANICS"