Wall Effects induced by Ceramic in Quiescent Liquids

2nd International Conference on Rheology and Modeling of Materials

Noirez, L.^1 ; Baroni, P.^1

Laboratoire Léon Brillouin (CEA-CNRS), Ce-Saclay, Gif-sur-Yvette Cédex, France^1

关键词: Capillary effects;    Interfacial effects;    Liquid-solid interfaces;    Localized effects;    Metal oxide surfaces;    Temperature drops;    Temperature increase;    Thermal measurements;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/790/1/012024/pdf
DOI  :  10.1088/1742-6596/790/1/012024

来源: IOP

【 摘 要 】

At the liquid-solid interface, the energy of the liquid is different from the bulk resulting from surface tension due to the balance between the attraction between molecules to each other (cohesion) and the attraction to the surface (wetting). While capillary effects are well known and described at the air/liquid/solid interfaces, much less is known on the effects induced in the bulk close to the wall. The present experimental study reveals that non-negligible interfacial effects can be revealed in the bulk of the liquid using the high wetting power of ceramics. Close to the wall, thermal measurements reveal a progressive temperature drop in the liquid (about 0.15°C). This zone extends up to several millimeters, creates a non-equilibrium/equilibrium interface within the liquid and is balanced at larger distances by a temperature increase. This localized effect is highlighted with strong wetting metal oxide surfaces as ceramics.