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Proceedings : 18th symposium on anemometry
Chára, Zdeněk ; Klaboch, L.
18th Symposium on Anemometry was held in June 10-11, 2003 at Uvaly near Prague. On this meeting more than 40 scientists participated from Czech, Slovak and Germany. The program of the Conference was focused mainly on experimental methods in fluid mechanics like LDA, PDA, PIV, CTA.
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LDA measurements of two-velocity components in a pipe
Chára, Zdeněk
The paper deals with the LDA measurements of velocity field in a circular pipe when both pipe and flowing medium have different optical properties. The study is focused on the problem of different optical paths of laser beams when two-velocity components are measured. The possibility how to improve the problem is discussed.
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Effect of surfactants ageing on drag reduction
Mík, Václav ; Myška, Jiří
Four different surfactants were investigated in a closed hydraulic loop in order to find the influence of age of the solution on drag reducing effectiveness and on decrease of critical shear stress. It shows that ageing of a particular surfactant is dependent on its concentration. Different sensitivity of solutions to flow disturbances indicates an individualism of single surfactants with worm-like micelles.
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Rheology and texture of multiphase emulsion systems
Štern, Petr ; Pokorný, J.
Sensory and texture analyses are important tools to characterise the acceptance of food products by consumers. The aim was to correlate the results of rheological and sensory analysis because they can directly an more easily be applied in production and quality control. As an example were chossen Tartar souces - emulsion of edible oil in an aqueous phase consisting of water, salts, vinegar, modified starch and other flavoring. Functional relations between rheological parameters of tartar souces and sensory characteristics were determined.
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On the Diameter Efect in Surfactant Flow
Myška, Jiří
The lecture shows the influence of the diameter size of a tube on the flow of suspension of rigid particles with a drag reducing surfactant. The experimental variables were both concentrations of suspension and surfactant, and four different tube diameters.
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