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TitleImproving the numerical stability of steady-state differential viscoelastic flow solvers in OpenFOAM (R)
Author(s)Fernandes, C.
Araujo, Manoel S. B.
Ferrás, Luís Jorge Lima
Nóbrega, J. M.
Issue date2019
PublisherSpringer International Publishing AG
Abstract(s)This work reports the developments made in improving the numerical stability of the viscoelastic solvers available in the open-source finite volume computational library OpenFOAM (R). For this purpose, we modify the usual both-side diffusion (BSD) technique, using a new approach to discretize the explicit diffusion operator. Calculations performed with the new solver, for two benchmark 2D case studies of an upper-convected Maxwell (UCM) fluid, are presented and compared with literature results, namely the 4:1 planar contraction flow and the flow around a confined cylinder. In the 4:1 planar contraction flow, the corner vortex size predictions agree well with the literature, and a relative error below 5.3% is obtained for De <= 5. In the flow around a confined cylinder, the predictions of the drag coefficient on the cylinder are similar to reference data, with a relative error below 0.16% for De <= 0.9.
TypeConference paper
AccessRestricted access (UMinho)
Appears in Collections:IPC - Textos completos em actas de encontros científicos internacionais com arbitragem

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