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Fluid Flow Visualization through Fluidized Bed of Solid Spherical Particles
Authors: Šiška Bedřich | Simon Miloslav | Machač Ivan
Year: 2006
Type of publication: článek ve sborníku
Name of source: Proceedings of the 33rd International Conference of Slovak Society of Chemical Engineering
Publisher name: Slovak Society of Chemical Engineering
Place: Bratislava, Slovakia
Page from-to: 066/1-066/10
Titles:
Language Name Abstract Keywords
cze Vizualizace toku tekutiny fluidní vrstvou kulových částic Práce prezentuje výsledky studia vlivu reologických vlastností kapalin na průběh expanze a vývoje struktury fluidní vrstvy a toku kapaliny fluidní vrstvou. Pro vizualizaci toku kapaliny fluidní vrstvou byla využita metoda přidávání obarvené modelové kapaliny. Jako modelové částice byly použity skleněné kulové částice a kapaliny vykazující newtonské a nenewtonské chování. Reologické vlastnosti modelových kapalin byly stanoveny na reometru RS150. K vlastním expanzním experimetům byla použita fluidační kolona obdélníkového průřezu. Vizualizace toku kapaliny fluidní vrstvou částic a vývoj její struktury byly zaznamenány pomocí videokamery. Struktura fluidní vrstvy a průběh vizualizace toku kapaliny touto vrstvou byly vyhodnoceny na základě zpracování časové série zaznamenaných snímků metodami analýzy obrazu. Fluidace;Vizualizace toku;Nenewtonské kapaliny
eng Fluid Flow Visualization through Fluidized Bed of Solid Spherical Particles Flow visualization is an important topic in scientific visualization and has been the subject of research to gain an understanding of the flow. In this contribution, we present results of study of effects of rheological behaviour of the fluid on the fluidized bed expansion course, the development of the bed structure and flow of fluid through fluidized bed. Flow visualization was carried out using dye advection method. In our experiments, aqueous solutions of Newtonian fluid and different polymers (viscoelastic fluids) were used at fluidization of spherical particles. Glass spheres were used for preparing the beds. The rheological properties of test liquids were measured using rotational rheometer RS 150. As the test column was used a rectangular (?two-dimensional?) column. The flow pattern and the development of the fluidized bed structure were recorded by the camera miniDV. The expansion curve courses were compared for fluidization with Newtonian, pseudoplastic and viscoelastic fluids. The bed structures and flow pattern were evaluated by means of time-sequences of images. Methods of image analysis were using for processing obtained images. The obtained quantities characterizing the fluidized bed flow were used for description of the bed structure and flow pattern through fluidized bed. Fluidization;Flow visualization;Non-Newtonian liquid

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