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Statements

Subject Item
n2:RIV%2F68407700%3A21220%2F14%3A00221158%21RIV15-TA0-21220___
rdf:type
skos:Concept n11:Vysledek
dcterms:description
In the paper, the effect of particle concentration on critical impeller speed necessary for mixing of fine suspensions is presented. A single down pumping folded blade turbine with vessel to impeller diameter ratio D/d = 3 was used for mixing of a chalk suspensions. Measurements were carried out in cylindrical baffled vessel with diameter 300 mm. The mean volumetric diameter of particles was 4.6 μm and their mean volumetric concentration was changed in the range from 2.5 % to 40 %. The Bingham model was used for rheological behaviour description of chalk suspensions. A specific dimensionless criterion was used for calculation of critical speed. The criterion is proportional to the ratio of dynamic pressure to yield stress. The value of this criterion obtained for folded blade turbine was compared with corresponding values reported earlier for standard pitched blade turbine and also for three types of impellers produced by TECHMIX. There are also compared the different types of impellers according to their power consumption necessary for mixing of fine suspensions. For the comparison, a specific dimensionless criterion was proposed in the paper. In the paper, the effect of particle concentration on critical impeller speed necessary for mixing of fine suspensions is presented. A single down pumping folded blade turbine with vessel to impeller diameter ratio D/d = 3 was used for mixing of a chalk suspensions. Measurements were carried out in cylindrical baffled vessel with diameter 300 mm. The mean volumetric diameter of particles was 4.6 μm and their mean volumetric concentration was changed in the range from 2.5 % to 40 %. The Bingham model was used for rheological behaviour description of chalk suspensions. A specific dimensionless criterion was used for calculation of critical speed. The criterion is proportional to the ratio of dynamic pressure to yield stress. The value of this criterion obtained for folded blade turbine was compared with corresponding values reported earlier for standard pitched blade turbine and also for three types of impellers produced by TECHMIX. There are also compared the different types of impellers according to their power consumption necessary for mixing of fine suspensions. For the comparison, a specific dimensionless criterion was proposed in the paper.
dcterms:title
Mixing of fine concentrated suspensions Mixing of fine concentrated suspensions
skos:prefLabel
Mixing of fine concentrated suspensions Mixing of fine concentrated suspensions
skos:notation
RIV/68407700:21220/14:00221158!RIV15-TA0-21220___
n4:aktivita
n14:P
n4:aktivity
P(TA02010243)
n4:dodaniDat
n5:2015
n4:domaciTvurceVysledku
n7:9668861 n7:2201488
n4:druhVysledku
n16:O
n4:duvernostUdaju
n6:S
n4:entitaPredkladatele
n13:predkladatel
n4:idSjednocenehoVysledku
29572
n4:idVysledku
RIV/68407700:21220/14:00221158
n4:jazykVysledku
n17:eng
n4:klicovaSlova
mixing; suspension; bingham; impeller speed; folded blade
n4:klicoveSlovo
n8:bingham n8:impeller%20speed n8:mixing n8:folded%20blade n8:suspension
n4:kontrolniKodProRIV
[11C082E93484]
n4:obor
n12:JP
n4:pocetDomacichTvurcuVysledku
2
n4:pocetTvurcuVysledku
3
n4:projekt
n15:TA02010243
n4:rokUplatneniVysledku
n5:2014
n4:tvurceVysledku
Rieger, František Moravec, Jiří Ceres, Dorin
n9:organizacniJednotka
21220