Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 12, 2016 - November 13, 2016
In recent years, graphene oxide suspension has been attracting attention, because of its high thermal conductivity and high lubricity characteristics. The purpose of this study is to determine the characteristics of the pipe flow of graphene oxide suspensions experimentally. Experiments were carried out using a stainless steel pipe with an inner diameter of 2 mm. Graphene oxide in the form of monolayer sheets of 0.8 nm thickness was used in this study. Sheets of two sizes were used: 3 μm and 300 nm. The concentration of suspension is 0.1 wt%. The results of the study showed that the viscosity of graphene oxide suspensions can be regarded as equivalent to that of Newtonian fluids, and the viscosity of graphene oxide suspensions increases with increasing particle size. The friction coefficient of graphene oxide suspensions is the same as that of distilled water in the laminar flow range. In the turbulent flow region, the friction coefficient of graphene oxide suspensions decreases slightly compared to that of distilled water.
