Maldistribution of fluids in extrudates

Research output: Contribution to journalArticle

Standard

Maldistribution of fluids in extrudates. / Patel, MJ; Wedderburn, John; Blackburn, Stuart; Wilson, DI.

In: Journal of the European Ceramic Society, Vol. 29, No. 5, 01.03.2009, p. 937-941.

Research output: Contribution to journalArticle

Harvard

APA

Vancouver

Author

Patel, MJ ; Wedderburn, John ; Blackburn, Stuart ; Wilson, DI. / Maldistribution of fluids in extrudates. In: Journal of the European Ceramic Society. 2009 ; Vol. 29, No. 5. pp. 937-941.

Bibtex

@article{822d8157350b40bfa6440d4ca57efbe1,
title = "Maldistribution of fluids in extrudates",
abstract = "Solid-liquid pastes featuring high volume fractions of particulates are frequently used in ceramic forming operations. When pastes are used it is important that the particulate distribution remains uniform throughout the body. The stresses imposed during extrusion processing can, however, promote differential flow between the solid and liquid phases giving rise to product and processing problems. Reliable models for predicting phase distribution changes in these multi-phase systems are in their infancy. This paper reports progress towards developing simulation techniques and practical systems to verify the numerical approaches. Pastes containing glass spheres suspended in a highly viscous Newtonian fluid have been extruded at various speeds and solids loadings. Load and liquid content data are presented which form the basis for model verification. Soil mechanics approaches are used here to encapsulate the inherently multi-phase nature of these systems. The modified Cam-Clay model has been implemented in a finite element analysis simulation of ram extrusion using the ABAQUS platform. The simulation requires regular and extensive remeshing and monitoring of the conservation of mass. Predictions of extrusion pressures and deformation behaviour are compared with the experimental data for a series of square-ended and conical dies. (c) 2008 Elsevier Ltd. All rights reserved.",
keywords = "Paste, Extrusion, Soil mechanics, Phase migration, Modelling",
author = "MJ Patel and John Wedderburn and Stuart Blackburn and DI Wilson",
year = "2009",
month = mar,
day = "1",
doi = "10.1016/j.jeurceramsoc.2008.07.037",
language = "English",
volume = "29",
pages = "937--941",
journal = "Journal of the European Ceramic Society",
issn = "0955-2219",
publisher = "Elsevier",
number = "5",

}

RIS

TY - JOUR

T1 - Maldistribution of fluids in extrudates

AU - Patel, MJ

AU - Wedderburn, John

AU - Blackburn, Stuart

AU - Wilson, DI

PY - 2009/3/1

Y1 - 2009/3/1

N2 - Solid-liquid pastes featuring high volume fractions of particulates are frequently used in ceramic forming operations. When pastes are used it is important that the particulate distribution remains uniform throughout the body. The stresses imposed during extrusion processing can, however, promote differential flow between the solid and liquid phases giving rise to product and processing problems. Reliable models for predicting phase distribution changes in these multi-phase systems are in their infancy. This paper reports progress towards developing simulation techniques and practical systems to verify the numerical approaches. Pastes containing glass spheres suspended in a highly viscous Newtonian fluid have been extruded at various speeds and solids loadings. Load and liquid content data are presented which form the basis for model verification. Soil mechanics approaches are used here to encapsulate the inherently multi-phase nature of these systems. The modified Cam-Clay model has been implemented in a finite element analysis simulation of ram extrusion using the ABAQUS platform. The simulation requires regular and extensive remeshing and monitoring of the conservation of mass. Predictions of extrusion pressures and deformation behaviour are compared with the experimental data for a series of square-ended and conical dies. (c) 2008 Elsevier Ltd. All rights reserved.

AB - Solid-liquid pastes featuring high volume fractions of particulates are frequently used in ceramic forming operations. When pastes are used it is important that the particulate distribution remains uniform throughout the body. The stresses imposed during extrusion processing can, however, promote differential flow between the solid and liquid phases giving rise to product and processing problems. Reliable models for predicting phase distribution changes in these multi-phase systems are in their infancy. This paper reports progress towards developing simulation techniques and practical systems to verify the numerical approaches. Pastes containing glass spheres suspended in a highly viscous Newtonian fluid have been extruded at various speeds and solids loadings. Load and liquid content data are presented which form the basis for model verification. Soil mechanics approaches are used here to encapsulate the inherently multi-phase nature of these systems. The modified Cam-Clay model has been implemented in a finite element analysis simulation of ram extrusion using the ABAQUS platform. The simulation requires regular and extensive remeshing and monitoring of the conservation of mass. Predictions of extrusion pressures and deformation behaviour are compared with the experimental data for a series of square-ended and conical dies. (c) 2008 Elsevier Ltd. All rights reserved.

KW - Paste

KW - Extrusion

KW - Soil mechanics

KW - Phase migration

KW - Modelling

U2 - 10.1016/j.jeurceramsoc.2008.07.037

DO - 10.1016/j.jeurceramsoc.2008.07.037

M3 - Article

VL - 29

SP - 937

EP - 941

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

SN - 0955-2219

IS - 5

ER -