Determination of rheological data from mixing experiments

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F14%3A00221280" target="_blank" >RIV/68407700:21220/14:00221280 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Determination of rheological data from mixing experiments

Popis výsledku v původním jazyce

Sludge suspensions and highly concentrated fine-grained suspensions behave mostly like non-Newtonian power law liquids. When designing mixing equipment for suspensions of this kind, the Metzner - Otto concept is often used for calculating the power consumption required for mixing. In this paper, the concept is used for describing the flow behaviour of several types of sludge. Rheological experiments were carried out in a vessel mixed using a curved blade turbine or alternatively an anchor agitator. Thesludge exhibited strongly non-Newtonian behaviour corresponding to the power-law model with the flow index in the range from 0.07 to 0.22 and the coefficient of consistency in the range from 2 to 84 Pa.s^m. The Metzner - Otto constant of the anchor agitator obtained from the literature has been validated for suspensions having such a low flow index. Our work has also proved that sludges can be substituted by model sawdust suspensions, thus facilitating experimental work.

Název v anglickém jazyce

Determination of rheological data from mixing experiments

Popis výsledku anglicky

Sludge suspensions and highly concentrated fine-grained suspensions behave mostly like non-Newtonian power law liquids. When designing mixing equipment for suspensions of this kind, the Metzner - Otto concept is often used for calculating the power consumption required for mixing. In this paper, the concept is used for describing the flow behaviour of several types of sludge. Rheological experiments were carried out in a vessel mixed using a curved blade turbine or alternatively an anchor agitator. Thesludge exhibited strongly non-Newtonian behaviour corresponding to the power-law model with the flow index in the range from 0.07 to 0.22 and the coefficient of consistency in the range from 2 to 84 Pa.s^m. The Metzner - Otto constant of the anchor agitator obtained from the literature has been validated for suspensions having such a low flow index. Our work has also proved that sludges can be substituted by model sawdust suspensions, thus facilitating experimental work.

Druh

D - Stať ve sborníku

CEP obor

JP - Průmyslové procesy a zpracování

OECD FORD obor

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Projekt

<a href="/cs/project/TA02010243" target="_blank" >TA02010243: Míchací zařízení pro zpracování kalových suspenzí</a><br>

Návaznosti

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

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název statě ve sborníku

20th International Conference of Process Engineering and Chemical Plant Design - Conference Proceedings

ISBN

978-3-00-047364-7

ISSN

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e-ISSN

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Počet stran výsledku

12

Strana od-do

211-222

Název nakladatele

Technische Universität

Místo vydání

Berlin

Místo konání akce

Berlín

Datum konání akce

15. 10. 2014

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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