Browsing by Author "Fialová Simona"
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- ItemA liquid interaction with ultrahydrophobic surfaces(EDP Sciences, 2016-01-01) Jašíková Darina; Kotek Michal; Fialová Simona; Kopecký Václav
- ItemCoandã effect with the influence of hydrophobic surface(American Institute of Physics Inc., 2016-01-01) Pochylý František; Fialová Simona; Kotek Michal; Jašíková Darina; Machu Tomáš
- ItemEffect of Hydrophobic Surface on Velocity Profile of Pipe Flow(2017-01-01) Jašíková Darina; Kotek Michal; Fialová Simona; Kopecký Václav
- ItemFlow of Newtonian and non-Newtonian fluid through pipe with flexible wall(American Institute of Physics Inc., 2018-01-01) Šedivý Dominik; Fialová Simona; Jašíková Darina
- ItemStudy of the influence of adhesion coefficient on the cavitation formation and the cavitation zone width(2015-01-01) Jašíková Darina; Kotek Michal; Kopecký Václav; Fialová Simona; Pochylý František; Klíma Miloš
- ItemThe design of the experimental device for the measurement of slip velocity near the wall depending on Coand effect ; Study of the influence of adhesion coefficient on the formation of vortex structures depending on the Coand effect(2015-01-01) Jašíková Darina; Kotek Michal; Kopecký Václav; Fialová Simona; Pochylý František; Klíma Miloš
- ItemThe interaction between fluid flow and ultra-hydrophobic surface in mini channel(TUL Liberec, 2016-01-01) Jašíková Darina; Gasič Maja; Fialová Simona; Kotek Michal; Kopecký Václav
- ItemThe interaction between fluid flow and ultra-hydrophobic surface in mini channel(EDP Sciences, 2017-01-01) Jašíková Darina; Gasič Maja; Fialová Simona; Kotek Michal; Kopecký VáclavInteraction of liquid with ultra-hydrophobic surface is accompanied by creation of layer of air. The effect of the air film has a potential of use in industry in many applications. The quality of the surface is influenced by matrix roughness, the character of physical or chemical cover. There was developed a method for analysis of the liquid flow and the air film using the lighting in volume, visualization with CCD camera and long distance microscope, and optical filters. There were prepared four stainless steel samples of inner channel of dimensions (80 x 8 x 8) mm and initial surface roughness Ra 0.33, Ra 1.0, Ra 2.0, and Ra 2.2. The inner channel was treated with plasma and commercial hydrophobic coating Greblon (WEILBURGER Coatings GmbH). There was realized study focused on the liquid flow velocity profile close to the air film. There are present results for laminar, transient and turbulent flows. The study also estimated the air film thickness depending on the Re number. The knowledge of the air film behaviour helps applied suitable degree of processing and cover for the target application.
- ItemVelocity profiles of fluid flow close to a hydrophobic surface(2017-01-01) Fialová Simona; Pochylý František; Jašíková Darina; Kotek MichalThe results of research on viscous liquid flow upon a superhydrophobic surface are presented in the paper. In the introduction, the degrees of surface hydrophobicity in correlation with an adhesion coefficient are defined. The usage of the adhesion coefficient for the definition of a new boundary condition is employed for expressing the slip of the liquid over the superhydrophobic surface. The slip of the liquid was identified on a special experimental device. The essence of the device consists of a tunnel of rectangular cross section whose one wall is treated with a superhydrophobic layer. The other walls are made of transparent organic glass whose surface is hydrophilic. Velocity profiles are measured by PIV. The methodology is drawn so that it allows the speed determination at the closest point to the wall. The measurements were performed for different Reynolds numbers for both laminar and turbulent flow. Based on the measured velocity profiles, marginal terms of use have been verified, expressing slippage of the liquid on the wall. New forms of velocity profiles considering superhydrophobic surfaces are shown within the work.
- ItemVelocity profiles of fluid flow close to a hydrophobic surface(TUL Liberec, 2016-01-01) Fialová Simona; Pochylý František; Kotek Michal; Jašíková Darina