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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

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

Texto completo
Autor(es):
Tome, M. F. [1] ; McKee, S. [2] ; Walters, K. [3]
Número total de Autores: 3
Afiliação do(s) autor(es):
[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
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Journal of Non-Newtonian Fluid Mechanics; v. 165, n. 19-20, p. 1258-1264, OCT 2010.
Citações Web of Science: 1
Resumo

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)

Processo FAPESP: 04/16064-9 - Mecânica dos fluídos não estacionária: aplicações em aeronáutica e em reologia
Beneficiário:José Alberto Cuminato
Linha de fomento: Auxílio à Pesquisa - Temático