Journal ArticleDOI
Suspension of solids by mechanical agitation
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In this paper, an expression for the minimum pick up velocity of the fluid, i.e., the minimum velocity required to initiate the suspension of solids in a mechanically agitated system has been obtained based on the flow pattern, system geometry and physical properties of the two phases involved.About:
This article is published in Chemical Engineering Science.The article was published on 1969-02-01. It has received 46 citations till now. The article focuses on the topics: Suspension (vehicle).read more
Citations
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Complete suspension of particles in mechanically agitated vessels
TL;DR: In this paper, a new model is proposed to explain the mechanism of complete suspension of solid particles in cylindrical flat-bottomed stirred tanks, which is mainly due to turbulent eddies of a scale of the order of the particles size.
Journal ArticleDOI
Mechanically agitated gas-liquid reactors
TL;DR: In this paper, the hydrodynamic, heat and mass transfer characteristics of mechanically agitated contactors have been critically reviewed and the mixing time (θmix) can be correlated well by a model based on circulation path and average circulation velocity.
Journal ArticleDOI
Effect of low off-bottom impeller clearance on the minimum agitation speed for complete suspension of solids in stirred tanks
TL;DR: In this paper, the effect of the impeller off-bottom clearance on the minimum agitation speed and power dissipation required to completely suspend solid particles in tanks provided with impellers having small clearances off the tank bottom was investigated.
Journal ArticleDOI
Development of an unresolved CFD-DEM model for the flow of viscous suspensions and its application to solid-liquid mixing
TL;DR: The unresolved CFD-DEM method is extended to viscous solid-liquid flows and it is shown that an additional sub-grid viscosity model is necessary to ensure the correct rheology of the suspensions.
Journal ArticleDOI
Review on Mixing Characteristics in Solid‐Liquid and Solid‐Liquid‐Gas Reactor Vessels
TL;DR: In this article, the authors review the experimental work reported in the literature along with different techniques used for the measurement of the specific quantities such as minimum or critical impeller speed for solid suspension.
References
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Journal ArticleDOI
Suspending of solid particles in liquid by agitators
TL;DR: In this paper, an investigation of the required stirrer speed and stirrer dimensions for the suspending of solid particles in a low viscosity liquid has been carried out and the results are given in dimensionless form.
Journal ArticleDOI
A comparative study on the rate of mixing in stirred tanks
H. Kramers,G.M. Baars,W.H. Knoll +2 more
TL;DR: In this article, measurements have been carried on the rapidity of distribution of a small amount of liquid added to the contents of an agitated vessel and their mixing speeds under different conditions can be compared.