Advanced search
Start date
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

A computational study of some rheological influences on the ``splashing experiment{''}

Full text
Tome, M. F. [1] ; McKee, S. [2] ; Walters, K. [3]
Total Authors: 3
[1] Univ Sao Paulo, Dept Appl Math & Stat, BR-13560 Sao Carlos - Brazil
[2] Univ Strathclyde, Dept Math & Stat, Glasgow G1 1HX, Lanark - Scotland
[3] Aberystwyth Univ, Inst Math & Phys Sci, Aberystwyth, Dyfed - Wales
Total Affiliations: 3
Document type: Journal article
Source: Journal of Non-Newtonian Fluid Mechanics; v. 165, n. 19-20, p. 1258-1264, OCT 2010.
Web of Science Citations: 1

In various attempts to relate the behaviour of highly-elastic liquids in complex flows to their rheometrical behaviour, obvious candidates for study have been the variation of shear viscosity with shear rate, the two normal stress differences N(1) and N(2), especially N(1), the extensional viscosity, and the dynamic moduli G' and G `'. In this paper, we shall confine attention to `constant-viscosity' Boger fluids, and, accordingly, we shall limit attention to N(1), eta(E), G' and G `'. We shall concentrate on the ``splashing{''} problem (particularly that which arises when a liquid drop falls onto the free surface of the same liquid). Modern numerical techniques are employed to provide the theoretical predictions. We show that high eta(E) can certainly reduce the height of the so-called Worthington jet, thus confirming earlier suggestions, but other rheometrical influences (steady and transient) can also have a role to play and the overall picture may not be as clear as it was once envisaged. We argue that this is due in the main to the fact that splashing is a manifestly unsteady flow. To confirm this proposition, we obtain numerical simulations for the linear Jeffreys model. (C) 2010 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 04/16064-9 - Mechanics of non-stationary fluids: applications in aeronautics and rheology
Grantee:José Alberto Cuminato
Support type: Research Projects - Thematic Grants