Improving the Numerical Stability of Steady-State Differential Viscoelastic Flow Solvers in OpenFOAM (R)

• Type: Article in International Conference Proceedings Book
• Date: 2019

Authors

Fernandes, C (Author) Other; Araujo, MSB (Author) Other; Ferras, LL (Author) FEUP; Nobrega, JM (Author) Other

Conference proceedings International

Title: OPENFOAM(R)

Pages: 269-280

11th Workshop on Open Source Field Operation And Manipulation (OpenFOAM)

Guimaraes, PORTUGAL, JUN 26-30, 2016

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Other information

Authenticus ID: P-00S-1DY

DOI: 10.1007/978-3-319-60846-4_20

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12