The meniscus depression of a porous spherical particle at the three phase contact line

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F06%3A00017290" target="_blank" >RIV/60461373:22340/06:00017290 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

The meniscus depression of a porous spherical particle at the three phase contact line

Original language description

The description of the processes at the three phase contact line is very important for the study of elementary steps in flotation. When a hydrophobic particle is attached to a gas-liquid interface, it is influenced by a number of forces, including surface tension, capillary and buoyancy forces on one hand and the particle weight on other. In case of porous particles must be also considered capillary forces acting in the porous surface. The meniscus depression at the three phase contact line is then determined by the resultant force. The meniscus depression of the floating particle was studied using image analysis method. The depression was studied for spherical polystyrene particles of diameters from 0.1mm to 3mm. We compared the experimental values ofmeniscus depression with the data calculated using theoretical and semi-empirical models. Also the theoretical description of forces acting on the floating spherical porous particle is given. We found that the existence of pores and surf

Czech name

Plovající částice; snížení menisku; pórovitý povrch; kapilarita

Czech description

Cílem projektu bylo experimentální studium snížení menisku v oblasti třífázového kontaktu plovoucí částice pomocí obrazové analýzy. Snížení menisku bylo studováno pro částice různých průměrů (0.1 - 3 mm) a různé smáčivosti v roztocích flotačních činidel.Všechny experimenty byly realizovány v malé nádobce snímané vysokorychlostní CCD kamerou s makro-objektivem. Jako modelové částice byly použity polystyrenové kuličky. Získaná data byla zpracována obrazovou analýzou pomocí softwaru LUCIA.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CI - Industrial chemistry and chemical engineering

OECD FORD branch

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Project

<a href="/en/project/GA104%2F05%2F2566" target="_blank" >GA104/05/2566: Hydrodynamic interactions of bubbles and particles in flotation process</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2006

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Advances in Fluid Mechanics VI

ISSN

1746-4471

e-ISSN

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Volume of the periodical

6

Issue of the periodical within the volume

6

Country of publishing house

GB - UNITED KINGDOM

Number of pages

9

Pages from-to

643-652

UT code for WoS article

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EID of the result in the Scopus database

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