Relation between pore size and the compressibility of a confined fluid
Abstract
When a fluid is confined to a nanopore, its thermodynamic properties differ from the properties of a bulk fluid, so measuring such properties of the confined fluid can provide information about the pore sizes. Here, we report a simple relation between the pore size and isothermal compressibility of argon confined in such pores. Compressibility is calculated from the fluctuations of the number of particles in the grand canonical ensemble using two different simulation techniques: conventional grand-canonical Monte Carlo and grand-canonical ensemble transition-matrix Monte Carlo. Our results provide a theoretical framework for extracting the information on the pore sizes of fluid-saturated samples by measuring the compressibility from ultrasonic experiments.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 18, 2015
- Source ID
- 10.1063/1.4935430
Entities
People
- Christopher J. Rasmussen
- Daniel W. Siderius
- Gennady Y Gor
- Noam Bernstein
- Vincent K. Shen
- William P. Krekelberg
Organizations
- DuPont
- National Institute of Standards and Technology
- Office of Naval Research
- United States Naval Research Laboratory