1976
DOI: 10.1063/1.433545
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A variational approach to the theory of ionic solutions

Abstract: In this paper we discuss a known variational principle for the Percus–Yevick integral equation and then generalize the procedure to obtain a variational principle for any integral equation associated with the Ornstein–Zernike equation. In particular we rederive a variational principle for the mean spherical model and then derive a variational principle for the hypernetted chain equation and compare these to the exact numerical results of Rasaiah and Friedman and to the Monte Carlo data of Rasaiah, Card, and Va… Show more

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Cited by 35 publications
(17 citation statements)
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“…Taking the problem from the other side, one can first search for the functionals of h(r) that yields the OZ equation with a chosen closure relation, here: the HNC closure. Such a systematic approach is exposed in [4]. Once these are found, one can then pick among them a functional that fulfills the charging relation.…”
Section: Key Steps Of Lado's Calculationmentioning
confidence: 99%
See 2 more Smart Citations
“…Taking the problem from the other side, one can first search for the functionals of h(r) that yields the OZ equation with a chosen closure relation, here: the HNC closure. Such a systematic approach is exposed in [4]. Once these are found, one can then pick among them a functional that fulfills the charging relation.…”
Section: Key Steps Of Lado's Calculationmentioning
confidence: 99%
“…In Ref. [4], the mean spherical model, which is closely related to the DH model, is addressed in order to find a generating functional of the direct correlation function. However, one can use the results of [4] in order to obtain the functional of Eq.…”
Section: Alternative Debye-hückel Free-energy Functionalmentioning
confidence: 99%
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“…We found useful to recast the ORPA equations in the framework of the generating functionals for the integral equations of the theory of liquids [17]. We show that the two different first-order expansions of the free energy functional corresponding to the well known Gibbs-Bogolioubov and Weeks-Chandler and Andersen approximations for the free energy [18] can be transformed into two closely related forms of the ORPA by addition of the same functional.…”
Section: Introductionmentioning
confidence: 97%
“…then the functional can be written18 where F 0 is a constant. In this case, B[h i (x)] is found by rearranging eq 1:Written in this manner, B[h i (x)] ) δF[h(x)]/δh(x) ) 0,and eq 5 can be used to obtain the functional F[h(x)].…”
mentioning
confidence: 99%