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Special Topics & Reviews in Porous Media: An International Journal

ISSN Print: 2151-4798
ISSN Online: 2151-562X

Special Topics & Reviews in Porous Media: An International Journal

DOI: 10.1615/SpecialTopicsRevPorousMedia.2016017291
pages 149-160

NUMERICAL ANALYSIS OF HEAT CONDUCTION TREATED WITH HIGHLY CONDUCTIVE COPPER OXIDE NANOPARTICLES IN POROUS MEDIA

Mohammad-Reza Rokhforouz
Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
Arash Rabbani
Petroleum University of Technology, Tehran, Iran
Shahab Ayatollahi
Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
Vahid Taghikhani
Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran; Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas, USA

ABSTRACT

In this paper, the effect of highly conductive copper oxide nanoparticles on the effective thermal conductivity (ETC) of rock samples was mathematically investigated. To solve the governing conservation equations for the ETC a commercial finite element package (COMSOL Multiphysics) was used. It should be stressed that the single-phase approach was employed to mathematically model the effect of nanofluid on the heat transfer improvement. The computational geometry of the rock samples was obtained by analyzing the microscopic images of the limestone rock samples. The results obtained from the mathematical modeling of the rock samples showed that the conductive heat transfer through porous media was affected by copper oxide nanofluid, porosity, and nanoparticle concentration. Also, the results confirmed that injection of copper oxide nanofluid with concentration of 0.01 M could enhance the ETC by 11.7% compared with the ETC of an air-saturated medium. However, water injection improved the ETC by 3.8% compared with the ETC of the air-saturated medium. The effect of rock porosity on the ETC was studied and it was shown that decreasing the porosity could result in an increment of the ETC. Finally, the effect of copper oxide nanoparticle concentration on the ETC was analyzed. After increments of the concentration of copper oxide nanoparticles from 0.01 M to 0.05 M, the ETC improved by 0.06%. The results confirmed that of the nanoparticles, copper oxide can be used for the improvement of heat transfer in rock-fluid samples.