Influence of viscosity and density differences on mixing times in stirred vessels

I. Bouwmans; H. E.A. van den Akker

Influence of viscosity and density differences on mixing times in stirred vessels

Delft University of Technology

Research output: Contribution to journal › Conference article › peer-review

Abstract

Mixing time measurements have been carried out in a 0.29 m diameter vessel mounted with an inclined blade impeller. The viscosity ratio between the added liquid and the bulk liquid has been varied between 0.009 and 11. The density difference has been varied between -100 and +50 kg/m³. The data show that for certain flow conditions the viscosity ratio and the density difference have a significant effect on the mixing time. For high stirrer speeds the mixing time can be predicted using the correlation N·t_m = constant. For low stirrer speeds the mixing can be described by the theory of surface renewal.

Original language	English
Pages (from-to)	1-12
Number of pages	12
Journal	Institution of Chemical Engineers Symposium Series
Issue number	121
Publication status	Published - 1990
Externally published	Yes
Event	Fluid Mixing IV - Bradford, Engl Duration: 11 Sep 1990 → 13 Sep 1990

Cite this

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abstract = "Mixing time measurements have been carried out in a 0.29 m diameter vessel mounted with an inclined blade impeller. The viscosity ratio between the added liquid and the bulk liquid has been varied between 0.009 and 11. The density difference has been varied between -100 and +50 kg/m3. The data show that for certain flow conditions the viscosity ratio and the density difference have a significant effect on the mixing time. For high stirrer speeds the mixing time can be predicted using the correlation N·tm = constant. For low stirrer speeds the mixing can be described by the theory of surface renewal.",

author = "I. Bouwmans and {van den Akker}, {H. E.A.}",

year = "1990",

language = "English",

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journal = "Institution of Chemical Engineers Symposium Series",

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T1 - Influence of viscosity and density differences on mixing times in stirred vessels

AU - Bouwmans, I.

AU - van den Akker, H. E.A.

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N2 - Mixing time measurements have been carried out in a 0.29 m diameter vessel mounted with an inclined blade impeller. The viscosity ratio between the added liquid and the bulk liquid has been varied between 0.009 and 11. The density difference has been varied between -100 and +50 kg/m3. The data show that for certain flow conditions the viscosity ratio and the density difference have a significant effect on the mixing time. For high stirrer speeds the mixing time can be predicted using the correlation N·tm = constant. For low stirrer speeds the mixing can be described by the theory of surface renewal.

AB - Mixing time measurements have been carried out in a 0.29 m diameter vessel mounted with an inclined blade impeller. The viscosity ratio between the added liquid and the bulk liquid has been varied between 0.009 and 11. The density difference has been varied between -100 and +50 kg/m3. The data show that for certain flow conditions the viscosity ratio and the density difference have a significant effect on the mixing time. For high stirrer speeds the mixing time can be predicted using the correlation N·tm = constant. For low stirrer speeds the mixing can be described by the theory of surface renewal.

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M3 - Conference article

AN - SCOPUS:0025541520

SN - 0307-0492

SP - 1

EP - 12

JO - Institution of Chemical Engineers Symposium Series

JF - Institution of Chemical Engineers Symposium Series

IS - 121

T2 - Fluid Mixing IV

Y2 - 11 September 1990 through 13 September 1990

ER -

Influence of viscosity and density differences on mixing times in stirred vessels

Abstract

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