Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 11, 2022 - September 14, 2022
This study investigates graphene oxide (GO) nanosheets with excellent thermal conductivity and water dispersibility as additives to achieve a trade-off between heat-transfer performance and drag reduction. We experimentally examine the pressure loss characteristics of GO nanosheet suspensions in ethylene glycol aqueous solution flowing through a recirculating pipeline system. The GO nanosheets have a size of 0.8 nm × 3 μm × 3 μm, and the test suspension concentration is 0.1%. When the base fluid is ethylene glycol, the results show that the suspension containing 0.1% graphene oxide nanosheet delays the transition to turbulence, and drag reduction occurs in this Reynolds number range.
This drag reduction rate is found to be lower than that when the base fluid is water.
