Physical features of Leidenfrost effect on the surface of a graphene nanocomposite for the problems of thermal and nuclear energy

Open School-Conference of NIS Countries Ultrafine Grained and Nanostructured Materials

Babenko, D.D.^1 ; Dmitriev, A.S.^1 ; Mikhailov, V.V.^1 ; Mikhailova, I.A.^1

National Research University, Moscow Power Engineering Institute, 14 Krasnokazarmennaya st., Moscow

111250, Russia^1

关键词: Graphene nanocomposites;    Hybrid nanocomposites;    Leidenfrost point;    Leidenfrost temperature;    Longitudinal dimension;    Metal microspheres;    Physical features;    Smooth surface;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/447/1/012044/pdf
DOI  :  10.1088/1757-899X/447/1/012044

来源: IOP

【 摘 要 】

We investigate the possibility of overcoming the Leidenfrost point to achieve the stable boiling of a pool (not a film) at temperatures much higher than the Leidenfrost temperature for water on smooth surfaces. We have studied the Leidenfrost effect (droplets on a surface overheated above the film boiling temperature). Surfaces made of hybrid graphene nanocomposites are used as substrates. We investigated two types of nanocomposites based on graphene flakes (the size of the latter being about 3-5 nm in thickness, longitudinal dimensions of about 10-20 μm), sintered at a pressure of 200-300 bar, and hybrid nanocomposites consisting of graphene flakes, metal microspheres (a diameter of about 100-200 microns) and a small amount of polymer (epoxy resin).