Disjoining pressure nano particles pdf

We also differentiate between the disjoining pressure mechanism and diffusion of silica nanoparticles through the oil phase by testing the attachment of. This paper presents the results of imbibition tests using a reservoir crude oil and a reservoir brine solution with a high salinity and a suitable nanofluid that displaces crude oil from berea sandstone waterwet and singleglass capillaries. Pdf nanofluids composed of liquid suspensions of nanoparticles may soon permit. Effect of nanoparticles on spontaneous imbibition of water. Nanofluids comprising nanoparticle suspensions in liquids have significant industrial applications. Disjoining pressure and the energy of thin films softmatter. Wetting and spreading of nanofluids on solid surfaces driven by. Prior work performed in our laboratory on the spreading of a nanofluid on a solid substrate has revealed that the structural disjoining pressure gradient caused by the layering of the nanoparticles normal to the confining plane of the film with the wedge profile is a new mechanism for oily soil. This paper discusses the role of the structural disjoining pressure exerted by nanoparticles on the spreading of a liquid film containing these particles. Here, we present our experimental observations and the.

Request pdf spreading of nanoflulds driven by the structural disjoining. The wetting and spreading of nanofluids composed of liquid suspensions of nanoparticles have significant technological applications. Recent studies have revealed that, compared to the spreading of base liquids without nanoparticles, the spreading of wetting nanofluids on solid surfaces is enhanced by the structural disjoining pressure. The origin of the structural disjoining pressure in a confined geometry is due to the layering. Investigating the application of nano particles for. Toward a mechanistic understanding of wettability alteration in. This can be achieved by the structural disjoining pressure employed by nanoparticles on the spreading of a liquid film containing these particles on the rock surface 6. Disjoining pressure disjoining pressure is defined as the attractive and repulsive forces between two thin layer of fluid surfaces. Spreading of nanoflulds driven by the structural disjoining pressure. Spreading of nanofluids driven by the structural disjoining pressure gradient. The first part of this paper addresses studies about the major eor mechanisms of nanoparticles used in the forms of nanofluids, nanoemulsions and nanocatalysts, including disjoining pressure. One physical example of a disjoining pressure helps make this clearer is the case of a surface sandwiched between two parallel plates.

The disjoining pressure was defined at mechanical equilibrium by derjaguin and. However, nanofluid spreading or wetting is enhanced by the structural disjoining pressure because of the ordering of the nanoparticles. A positive disjoining pressure \pi corresponds to spreading of the liquid. Enhanced oil recovery eor using nanoparticle dispersions. Pdf enhanced oil recovery eor driven by nanofilm structural. The illinois institute of technology iit nanofluid is specially formulated to survive in a highsalinity environment and is found to result in an. Pdf spreading of nanofluids driven by the structural. For two flat and parallel surfaces, the value of the disjoining pressure i. This study provides new insights into the complex interactions between nanoparticles. Structural disjoining pressure induced solid particle.