The entropy of fluids confined within nano pores by Density Functional Theory

Kamalvand, Mohammad and Keshavarzi, Ezat (2008) The entropy of fluids confined within nano pores by Density Functional Theory. In: 11th Iranian Physical Chemistry Seminar-July 2008, July 2008, Ardabil, Iran.

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Abstract

The behavior of a fluid in a solid porous medium differs markedly from the behavior of the same fluid in the bulk. The confined fluid is constrained to a pore space, generally of complicated shape, is affected by the external force field due to the solid matrix. The equilibrium spatial distribution of fluid and consequently the thermodynamic properties of the confined fluid, result from a balance of external forces on fluid molecules and internal forces among fluid molecules themselves. Therefore, the introduction of wall forces, and the competition between fluid–wall and fluid–fluid forces, can lead to interesting phase changes, include new kinds of phase transitions not found in the bulk phase, e.g. layering and wetting transitions, as well as shifts in regular bulk transitions (e.g. freezing, gas–liquid, and liquid–liquid). The same as real fluids, the structure and thermodynamic properties of a hard sphere fluid, confined in a porous media, is different from its bulk fluid properties. For a hard sphere fluid, there are not any long range forces and these differences may not due to energetic effects. The only reason to cause this difference is tendency of the system to maximize the entropy. In this research work we show that the entropy of a confined hard sphere fluid is differed dramatically from the bulk fluid entropy.

Item Type: Conference or Workshop Item (Paper)
Persian Title: The entropy of fluids confined within nano pores by Density Functional Theory
Persian Abstract: -
Subjects: Divisions > Conferences > 11th Iranian Physical Chemistry Seminar- July 2008
Conferences > 11th Iranian Physical Chemistry Seminar- July 2008
Divisions: Conferences > 11th Iranian Physical Chemistry Seminar- July 2008
Subjects > Conferences > 11th Iranian Physical Chemistry Seminar- July 2008
Date Deposited: 17 Jun 2019 05:40
Last Modified: 17 Jun 2019 05:40
URI: http://repository.uma.ac.ir/id/eprint/6830

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