Absolute Equilibrium EntropyBy
نویسنده
چکیده
The entropy associated with absolute equilibriumensemble theories of ideal, homogeneous, uid and magneto-uid turbulence is discussed and the three-dimensional uid case is examined in detail. A-function is de-ned, whose minimum value with respect to global parameters is the entropy. A comparison is made between the use of global functions and phase functions H (associated with the development of various H-theorems of ideal turbulence). It is shown that the two approaches are complimentary though conceptually diierent: H-theorems show that an isolated system tends to equilibrium while-functions allow the demonstration that entropy never decreases when two previously isolated systems are combined. This provides a more complete picture of entropy in the statistical mechanics of ideal uids.
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