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Extension of the square-gradient theory to fourth order

✍ Scribed by R.F. Kayser; H.J. Raveché

Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
356 KB
Volume
120
Category
Article
ISSN
0378-4371

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✦ Synopsis

In the square-gradient theory, the Helmholtz free energy density of a nonuniform fluid is approximated by that of a uniform fluid plus a term proportional to the square of the density gradient. Presented here is the extension of this theory (and the corresponding theory of the chemical potential) to fourth order in the gradients. The new results can be applied to study the pair correlation function and interfacial density profile in a fluid near its critical point.

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