Liquid-solid suspension theory with reference to possible applications in geology

Renzo Di Felice

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The first part of this paper provides an overview of the state of the art of the hydrodynamics of liquid suspensions of solid particles. It is shown that knowledge of the suspension Archimedes number is sufficient to estimate the voidage-velocity parameters for suspensions of solids possessing homogenous characteristics, thereby completely defining the system from a fluid dynamic point of view. A general relation is presented which will indicate if a solid-fluid system will be in the fixed or in the suspended state depending on the relative velocity between the two phases. Modifications of the previous approach when the solid particles are not spherical have been also indicated. The basic features of the pseudo-fluid approach are then presented. This approach is useful when the solids making up the suspension have different sizes: by the introduction of the pseudo-fluid apparent characteristics (density and viscosity) it is possible to make basic estimations of the suspension behaviour. The second part of the paper outlines possible application of suspension theory to geological phenomena, such as the vertical transport of water-sand suspensions. Aspects of interest are the minimum pressure required for the transport of the suspension, the estimation of suspension flow rate through an overall pressure balance, the vertical transport of large 'breccia' blocks and the behaviour of the solid particles present in the rising conduit once the overpressure falls below the minimum value needed to sustain the flow. Finally, a warning is given on the limitations of the presented relationships (e.g. the assumption of homogeneous solid dispersion in the suspension) and on situations such as inclined conduits which require a different approach.

Original languageEnglish
Pages (from-to)591-602
Number of pages12
JournalBasin Research
Volume22
Issue number4
DOIs
Publication statusPublished - Aug 2010
Externally publishedYes

Fingerprint

geology
liquid
fluid
geological phenomena
overpressure
fluid dynamics
breccia
viscosity
hydrodynamics
sand
solid particle
water

ASJC Scopus subject areas

  • Geology

Cite this

Liquid-solid suspension theory with reference to possible applications in geology. / Di Felice, Renzo.

In: Basin Research, Vol. 22, No. 4, 08.2010, p. 591-602.

Research output: Contribution to journalArticle

@article{7f2f5b60837349c0ac88e2d8c19cd51a,
title = "Liquid-solid suspension theory with reference to possible applications in geology",
abstract = "The first part of this paper provides an overview of the state of the art of the hydrodynamics of liquid suspensions of solid particles. It is shown that knowledge of the suspension Archimedes number is sufficient to estimate the voidage-velocity parameters for suspensions of solids possessing homogenous characteristics, thereby completely defining the system from a fluid dynamic point of view. A general relation is presented which will indicate if a solid-fluid system will be in the fixed or in the suspended state depending on the relative velocity between the two phases. Modifications of the previous approach when the solid particles are not spherical have been also indicated. The basic features of the pseudo-fluid approach are then presented. This approach is useful when the solids making up the suspension have different sizes: by the introduction of the pseudo-fluid apparent characteristics (density and viscosity) it is possible to make basic estimations of the suspension behaviour. The second part of the paper outlines possible application of suspension theory to geological phenomena, such as the vertical transport of water-sand suspensions. Aspects of interest are the minimum pressure required for the transport of the suspension, the estimation of suspension flow rate through an overall pressure balance, the vertical transport of large 'breccia' blocks and the behaviour of the solid particles present in the rising conduit once the overpressure falls below the minimum value needed to sustain the flow. Finally, a warning is given on the limitations of the presented relationships (e.g. the assumption of homogeneous solid dispersion in the suspension) and on situations such as inclined conduits which require a different approach.",
author = "{Di Felice}, Renzo",
year = "2010",
month = "8",
doi = "10.1111/j.1365-2117.2010.00460.x",
language = "English",
volume = "22",
pages = "591--602",
journal = "Basin Research",
issn = "0950-091X",
publisher = "Wiley Blackwell",
number = "4",

}

TY - JOUR

T1 - Liquid-solid suspension theory with reference to possible applications in geology

AU - Di Felice, Renzo

PY - 2010/8

Y1 - 2010/8

N2 - The first part of this paper provides an overview of the state of the art of the hydrodynamics of liquid suspensions of solid particles. It is shown that knowledge of the suspension Archimedes number is sufficient to estimate the voidage-velocity parameters for suspensions of solids possessing homogenous characteristics, thereby completely defining the system from a fluid dynamic point of view. A general relation is presented which will indicate if a solid-fluid system will be in the fixed or in the suspended state depending on the relative velocity between the two phases. Modifications of the previous approach when the solid particles are not spherical have been also indicated. The basic features of the pseudo-fluid approach are then presented. This approach is useful when the solids making up the suspension have different sizes: by the introduction of the pseudo-fluid apparent characteristics (density and viscosity) it is possible to make basic estimations of the suspension behaviour. The second part of the paper outlines possible application of suspension theory to geological phenomena, such as the vertical transport of water-sand suspensions. Aspects of interest are the minimum pressure required for the transport of the suspension, the estimation of suspension flow rate through an overall pressure balance, the vertical transport of large 'breccia' blocks and the behaviour of the solid particles present in the rising conduit once the overpressure falls below the minimum value needed to sustain the flow. Finally, a warning is given on the limitations of the presented relationships (e.g. the assumption of homogeneous solid dispersion in the suspension) and on situations such as inclined conduits which require a different approach.

AB - The first part of this paper provides an overview of the state of the art of the hydrodynamics of liquid suspensions of solid particles. It is shown that knowledge of the suspension Archimedes number is sufficient to estimate the voidage-velocity parameters for suspensions of solids possessing homogenous characteristics, thereby completely defining the system from a fluid dynamic point of view. A general relation is presented which will indicate if a solid-fluid system will be in the fixed or in the suspended state depending on the relative velocity between the two phases. Modifications of the previous approach when the solid particles are not spherical have been also indicated. The basic features of the pseudo-fluid approach are then presented. This approach is useful when the solids making up the suspension have different sizes: by the introduction of the pseudo-fluid apparent characteristics (density and viscosity) it is possible to make basic estimations of the suspension behaviour. The second part of the paper outlines possible application of suspension theory to geological phenomena, such as the vertical transport of water-sand suspensions. Aspects of interest are the minimum pressure required for the transport of the suspension, the estimation of suspension flow rate through an overall pressure balance, the vertical transport of large 'breccia' blocks and the behaviour of the solid particles present in the rising conduit once the overpressure falls below the minimum value needed to sustain the flow. Finally, a warning is given on the limitations of the presented relationships (e.g. the assumption of homogeneous solid dispersion in the suspension) and on situations such as inclined conduits which require a different approach.

UR - http://www.scopus.com/inward/record.url?scp=77955160221&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77955160221&partnerID=8YFLogxK

U2 - 10.1111/j.1365-2117.2010.00460.x

DO - 10.1111/j.1365-2117.2010.00460.x

M3 - Article

AN - SCOPUS:77955160221

VL - 22

SP - 591

EP - 602

JO - Basin Research

JF - Basin Research

SN - 0950-091X

IS - 4

ER -