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| The finite element numerical investigation of dam-break flow with obstacle |
| Received:April 01, 2021 Revised:May 29, 2021 |
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| DOI：10.7511/jslx20210401001 |
| KeyWord:dam-break flow finite element Level Set non-Newtonian fluids |
| Author | Institution |
| 高普阳 |
长安大学 理学院, 西安 |
| 杨扬 |
西北工业大学 航空学院, 西安 |
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| Abstract: |
| In this paper,we study the dam-break flow with obstacles via the finite element computational framework.We simulate this problem based on a two-phase flow model.The Level Set method is used to capture the moving interface and a simple correction technique is introduced to guarantee the mass conservation property.The Level Set and its re-initialization equations are all hyperbolic equations.Thus,we solve them using the stable and efficient discontinuous Galerkin method.As for the unified Navier-Stokes equation,we first decouple it via splitting scheme,and then solve the sub-equations using Streamline Upwind Petrov-Galerkin method.We first simulate the Newtonian fluid (water) dam-break flow with obstacles in the downstream are.Our numerical results are all identical to other numerical and experimental results in the literature.In addition,we also consider the non-Newtonian fluids,which are described by the power-law model.The influences of different non-Newtonian fluids on the whole flow process and interface profiles are analyzed. |