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Hard-sphere fluid-mediated interaction: a novel pressure expression with application of the weighted correlation approach
KTH, Kemisk apparatteknik.
KTH, Kemisk apparatteknik.ORCID-id: 0000-0001-6801-9208
(engelsk)Manuskript (preprint) (Annet vitenskapelig)
HSV kategori
Identifikatorer
URN: urn:nbn:se:hig:diva-26146OAI: oai:DiVA.org:hig-26146DiVA, id: diva2:1182537
Tilgjengelig fra: 2013-04-09 Laget: 2018-02-13 Sist oppdatert: 2022-06-13bibliografisk kontrollert
Inngår i avhandling
1. A weighted correlation approach of the density functional theory for an inhomogeneous fluid at an interface
Åpne denne publikasjonen i ny fane eller vindu >>A weighted correlation approach of the density functional theory for an inhomogeneous fluid at an interface
2013 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

This doctoral thesis presents a newly developed density functional theory (DFT), i.e., the weighted correlation approach (WCA), to study the structural and thermodynamic properties of an inhomogeneous fluid at an interface. The WCA approach provides a generic formulation to evaluate the change of the single-particle direct correlation function in terms of a series of pair direct correlation functions weighted by different correlation-weight functions with adjustable correlation-weight factors. When applied practically, however, an approximation of the pair direct correlation function has to be made, together with appropriate definitions of the weighted densities and the choices of the correlation-weight functions. Despite this seeming complexity, it is shown that the WCA approach can be regarded as a generalization of the classic density functional approaches and this enables us to develop and apply DFT methods in different ways. For demonstration purposes, several implementations of the WCA approach are proposed and applied to predict the density distribution of an inhomogeneous fluid at an interface. The WCA approach is also employed with a novel pressure expression to investigate the inhomogeneous fluid-mediated interaction pressure for different cases. The WCA calculations from the above applications suggest that it is a successful approach for describing the structural and thermodynamic properties of an inhomogeneous fluid at an interface, as compared to the published results of the Monte Carlo simulations, density functional methods and experimental data.

sted, utgiver, år, opplag, sider
Stockholm: KTH Royal Institute of Technology, 2013. s. viii, 62
Serie
TRITA-CHE Report, ISSN 1654-1081 ; 2013:9
Emneord
inhomogeneous fluid, interface, density functional theory
HSV kategori
Identifikatorer
urn:nbn:se:hig:diva-26145 (URN)978-91-7501-668-9 (ISBN)
Disputas
2013-05-16, Sal D3, Lindstedtsvägen 5, Stockholm, 10:00 (engelsk)
Opponent
Veileder
Prosjekter
Bentonite Erosion project, Svensk kärnbränslehantering AB (SKB)EC project BELBaR (Bentonite Erosion: effects on the Long term performance of the engineered Barrier and Radionuclide Transport)
Tilgjengelig fra: 2018-02-14 Laget: 2018-02-13 Sist oppdatert: 2018-03-13bibliografisk kontrollert

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