Visualization and measurement of the air film close ultra-hydrophobic surfaces

D. Jasikova; M. Gasic; M. Kotek; Václav Kopecky

doi:10.1117/12.2260997

11 November 2016 Visualization and measurement of the air film close ultra-hydrophobic surfaces

D. Jasikova, M. Gasic, M. Kotek, Václav Kopecky

Proceedings Volume 10151, Optics and Measurement International Conference 2016; 101510A (2016) https://doi.org/10.1117/12.2260997
Event: Optics and Measurement 2016 International Conference, 2016, Liberec, Czech Republic

Abstract

The ultra-hydrophobic surfaces have the prospect of great importance in industry, both in applications demanding easy cleaning, and they are presumed to reduce loss when the active parts of hydraulic machines are treated. Interaction of fluids with ultra-hydrophobic surface is accompanied by creation of layer of air, so called air film, which depends on the quality of the surface. The quality of the surface is influenced by the matrix roughness, the character of physical or chemical cover. This properties lead to monolithic air layer presented as air film, or lead to plurality of bubbles of various sizes seated upon the surface. The air film can be observed visually at sufficient magnification and the dynamic interaction between fluid flow and air film can be studied with Global Imaging methods, particularly Particle Image Velocimetry (PIV). There is the velocity profile in the vicinity of the air film in the main interest of the research. Here we present the visualization of air film depending on Reynolds number of flowing liquid.

Citation Download Citation

D. Jasikova, M. Gasic, M. Kotek, and Václav Kopecky "Visualization and measurement of the air film close ultra-hydrophobic surfaces", Proc. SPIE 10151, Optics and Measurement International Conference 2016, 101510A (11 November 2016); https://doi.org/10.1117/12.2260997

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