In:
Revista de Engenharia Térmica, Universidade Federal do Parana, Vol. 17, No. 1 ( 2018-06-30), p. 73-
Abstract:
This article addresses finite element approximations for elasto-viscoplastic flows. Numerical simulations aiming at investigating the role of elasticity for inertialess flows of viscoplastic materials within lid-driven cavity.The mechanical model is made up of the usual governing equations for incompressible fluids coupled with a Oldroyd-B type equation (de Souza Mendes, 2011) modified to incorporate the dependency both of relaxation and retardation time as the viscoplastic viscosity on the strain rate. These parameters depend on the material microstructure, which level is described by an structure parameter . This model is approximated by a multi-field Galerkin least-squares formulation (Behr et al., 1993) in terms of extra-stress tensor, the pressure field and the velocity vector. Results, focused on the determination of yield surface topology, investigate the influence of elastic and viscous governing parameters on the flow pattern.
Type of Medium:
Online Resource
ISSN:
1676-1790
DOI:
10.5380/reterm.v17i1
DOI:
10.5380/reterm.v17i1.62262
Language:
Unknown
Publisher:
Universidade Federal do Parana
Publication Date:
2018
detail.hit.zdb_id:
2236541-2
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