The Oldroyd-B constitutive equation is used for the numerical simulation of unsteady incompressible viscoelastic flows. A novelty treatment is presented for the incompressibility constraint of the incompressible viscoelastic flow by using the modified continuity equation which allows using equal-order interpolation polynomials for all variables. The proposed technique circumvents the so-called LBB compatibility condition without pressure checkerboard and the solution instabilities with less computational costs compared with the traditional techniques. The discrete elastic-viscous stress-splitting method (DEVSS) is used to treat the instabilities resulting from the numerical simulation of viscoelastic flows. Two benchmark problems are simulated, namely, the flow through a channel with a bump and the flow inside a square cavity. Solutions are obtained for different Weissenberg number values and the results are compared with the published works.
Published in | Mathematical Modelling and Applications (Volume 1, Issue 2) |
DOI | 10.11648/j.mma.20160102.11 |
Page(s) | 26-35 |
Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
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Copyright © The Author(s), 2016. Published by Science Publishing Group |
Unsteady Incompressible Viscoelastic Flow, Oldroyd-B Model, Pressure Stabilization Technique, The DEVSS Method, Galerkin Least Squares
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APA Style
Ahmed Elhanafy, Amr Guaily, Ahmed Elsaid. (2016). A Hybrid Stabilized Finite Element/Finite Difference Method for Unsteady Viscoelastic Flows. Mathematical Modelling and Applications, 1(2), 26-35. https://doi.org/10.11648/j.mma.20160102.11
ACS Style
Ahmed Elhanafy; Amr Guaily; Ahmed Elsaid. A Hybrid Stabilized Finite Element/Finite Difference Method for Unsteady Viscoelastic Flows. Math. Model. Appl. 2016, 1(2), 26-35. doi: 10.11648/j.mma.20160102.11
@article{10.11648/j.mma.20160102.11, author = {Ahmed Elhanafy and Amr Guaily and Ahmed Elsaid}, title = {A Hybrid Stabilized Finite Element/Finite Difference Method for Unsteady Viscoelastic Flows}, journal = {Mathematical Modelling and Applications}, volume = {1}, number = {2}, pages = {26-35}, doi = {10.11648/j.mma.20160102.11}, url = {https://doi.org/10.11648/j.mma.20160102.11}, eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.mma.20160102.11}, abstract = {The Oldroyd-B constitutive equation is used for the numerical simulation of unsteady incompressible viscoelastic flows. A novelty treatment is presented for the incompressibility constraint of the incompressible viscoelastic flow by using the modified continuity equation which allows using equal-order interpolation polynomials for all variables. The proposed technique circumvents the so-called LBB compatibility condition without pressure checkerboard and the solution instabilities with less computational costs compared with the traditional techniques. The discrete elastic-viscous stress-splitting method (DEVSS) is used to treat the instabilities resulting from the numerical simulation of viscoelastic flows. Two benchmark problems are simulated, namely, the flow through a channel with a bump and the flow inside a square cavity. Solutions are obtained for different Weissenberg number values and the results are compared with the published works.}, year = {2016} }
TY - JOUR T1 - A Hybrid Stabilized Finite Element/Finite Difference Method for Unsteady Viscoelastic Flows AU - Ahmed Elhanafy AU - Amr Guaily AU - Ahmed Elsaid Y1 - 2016/10/21 PY - 2016 N1 - https://doi.org/10.11648/j.mma.20160102.11 DO - 10.11648/j.mma.20160102.11 T2 - Mathematical Modelling and Applications JF - Mathematical Modelling and Applications JO - Mathematical Modelling and Applications SP - 26 EP - 35 PB - Science Publishing Group SN - 2575-1794 UR - https://doi.org/10.11648/j.mma.20160102.11 AB - The Oldroyd-B constitutive equation is used for the numerical simulation of unsteady incompressible viscoelastic flows. A novelty treatment is presented for the incompressibility constraint of the incompressible viscoelastic flow by using the modified continuity equation which allows using equal-order interpolation polynomials for all variables. The proposed technique circumvents the so-called LBB compatibility condition without pressure checkerboard and the solution instabilities with less computational costs compared with the traditional techniques. The discrete elastic-viscous stress-splitting method (DEVSS) is used to treat the instabilities resulting from the numerical simulation of viscoelastic flows. Two benchmark problems are simulated, namely, the flow through a channel with a bump and the flow inside a square cavity. Solutions are obtained for different Weissenberg number values and the results are compared with the published works. VL - 1 IS - 2 ER -