Thickness measurement in a horizontal liquid layer when heated from a localized hot-spot

All-Russian Conference with the School for Young Scientists “Thermophysics and Physical Hydrodynamics –2016”

Spesivtsev, S.E.^1,2 ; Lyulin, Yu V.^1,3 ; Marchuk, I.V.^1 ; Kabov, O.A.^1,3

Institute of Thermophysics, Lavrentiev Ave. 1, Novosibirsk

630090, Russia^1

Novosibirsk State University, Pirogov Ave. 2, Novosibirsk

630090, Russia^2

Tomsk Polytechnic University, Lenina Ave 30, Tomsk

634050, Russia^3

关键词: Breakdown dynamics;    Breakdown process;    Confocal sensors;    Critical thickness;    Horizontal layers;    Layer thickness;    Liquid layer;    Thermocapillary;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/754/3/032017/pdf
DOI  :  10.1088/1742-6596/754/3/032017

来源: IOP

【 摘 要 】

Thermocapillary breakdown of thin (0.3 - 0.7 mm) horizontal layers of liquid (ethanol) when heated from a localized hot spot was investigated experimentally. The effect of layer thickness on the breakdown dynamics was studied. Visualization and control of the liquid layer were carried out using schlieren and confocal techniques. Main steps of the breakdown process were determined with the help of both systems. Evolution of the layer thickness in the center of substrate was observed and the critical thickness of the layer was measured using confocal sensor.