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Extrusion of power-law shear thinning fluids with small exponent.

Extrusion of power-law shear thinning fluids with small exponent.
Extrusion of power-law shear thinning fluids with small exponent.
The slow flow of power-law shear-thinning fluids during extrusion is considered for materials where the exponent is asymptotically close to zero. Such flows arise in a number of practical industrial problems and give rise to some unexpected effects. Three different regions of extrusion flow are examined. First, some simple results for unidirectional flow in a one-dimensional channel are considered. Secondly, the region near to the die exit is then considered, and it is noted that an exponential asymptotic approach may be used to completely solve the problem of slow flow in a wedge with a sink at the vertex. Finally, the ram region of the extruder is considered and a detailed analysis is given of flow in a corner driven by the movement of one of the walls.
power-law fluids, shear thinning
0020-7462
187-199
Chapman, S.J.
2fb8f0b2-56ab-4ac7-8518-35abf1047cf9
Fitt, A.D.
51b348d7-b553-43ac-83f2-3adbea3d69ab
Please, C.P.
118dffe7-4b38-4787-a972-9feec535839e
Chapman, S.J.
2fb8f0b2-56ab-4ac7-8518-35abf1047cf9
Fitt, A.D.
51b348d7-b553-43ac-83f2-3adbea3d69ab
Please, C.P.
118dffe7-4b38-4787-a972-9feec535839e

Chapman, S.J., Fitt, A.D. and Please, C.P. (1997) Extrusion of power-law shear thinning fluids with small exponent. International Journal of Non-Linear Mechanics, 32 (1), 187-199. (doi:10.1016/S0020-7462(96)00042-X).

Record type: Article

Abstract

The slow flow of power-law shear-thinning fluids during extrusion is considered for materials where the exponent is asymptotically close to zero. Such flows arise in a number of practical industrial problems and give rise to some unexpected effects. Three different regions of extrusion flow are examined. First, some simple results for unidirectional flow in a one-dimensional channel are considered. Secondly, the region near to the die exit is then considered, and it is noted that an exponential asymptotic approach may be used to completely solve the problem of slow flow in a wedge with a sink at the vertex. Finally, the ram region of the extruder is considered and a detailed analysis is given of flow in a corner driven by the movement of one of the walls.

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Published date: 1997
Keywords: power-law fluids, shear thinning

Identifiers

Local EPrints ID: 29114
URI: https://eprints.soton.ac.uk/id/eprint/29114
ISSN: 0020-7462
PURE UUID: 52e55c2f-3178-44ec-9b8c-546ad8447fce

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Date deposited: 09 Jan 2007
Last modified: 15 Jul 2019 19:09

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