Unsteady open boundaries for SPH using semi-analytical conditions and Riemann solver in 2D
Due to the Lagrangian nature of SPH, treating inlet/outlet boundaries (that are intrinsically Eulerian) is a challenging issue. An extension to the Unified Semi-Analytical boundary conditions is presented to deal with unsteady open boundaries in confined and free-surface flows. The presented method...
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| Published in | Computer physics communications Vol. 210; pp. 29 - 44 |
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| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | English |
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Elsevier B.V
01.01.2017
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| Abstract | Due to the Lagrangian nature of SPH, treating inlet/outlet boundaries (that are intrinsically Eulerian) is a challenging issue. An extension to the Unified Semi-Analytical boundary conditions is presented to deal with unsteady open boundaries in confined and free-surface flows. The presented method uses Riemann invariants to calculate flow properties near the open boundaries, thus allowing the possibility to treat complex shapes. Furthermore, details are presented for a parallel implementation of this method, including particle creation and deletion, updating properties of vertices and segments, and additional constraints on the time step. Simple validation cases are then displayed to illustrate the performance of the proposed method as well as the ability to deal with complex problems such as generation of water waves and free outlets. |
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| AbstractList | Due to the Lagrangian nature of SPH, treating inlet/outlet boundaries (that are intrinsically Eulerian) is a challenging issue. An extension to the Unified Semi-Analytical boundary conditions is presented to deal with unsteady open boundaries in confined and free-surface flows. The presented method uses Riemann invariants to calculate flow properties near the open boundaries, thus allowing the possibility to treat complex shapes. Furthermore, details are presented for a parallel implementation of this method, including particle creation and deletion, updating properties of vertices and segments, and additional constraints on the time step. Simple validation cases are then displayed to illustrate the performance of the proposed method as well as the ability to deal with complex problems such as generation of water waves and free outlets. |
| Author | Joly, Antoine Leroy, Agnès Ferrand, Martin Rogers, Benedict D. Morel, François-Xavier Kassiotis, Christophe Violeau, Damien |
| Author_xml | – sequence: 1 givenname: Martin surname: Ferrand fullname: Ferrand, Martin email: martin.ferrand@edf.fr organization: Fluid Mechanics, Energy and Environment, EDF R&D, 78 400 Chatou, France – sequence: 2 givenname: Antoine surname: Joly fullname: Joly, Antoine email: antoine.joly@edf.fr organization: Saint-Venant Laboratory for Hydraulics, Université Paris-Est (ENPC, EDF R&D, CEREMA), 78 400 Chatou, France – sequence: 3 givenname: Christophe surname: Kassiotis fullname: Kassiotis, Christophe organization: Saint-Venant Laboratory for Hydraulics, Université Paris-Est (ENPC, EDF R&D, CEREMA), 78 400 Chatou, France – sequence: 4 givenname: Damien surname: Violeau fullname: Violeau, Damien organization: Saint-Venant Laboratory for Hydraulics, Université Paris-Est (ENPC, EDF R&D, CEREMA), 78 400 Chatou, France – sequence: 5 givenname: Agnès surname: Leroy fullname: Leroy, Agnès organization: Saint-Venant Laboratory for Hydraulics, Université Paris-Est (ENPC, EDF R&D, CEREMA), 78 400 Chatou, France – sequence: 6 givenname: François-Xavier surname: Morel fullname: Morel, François-Xavier – sequence: 7 givenname: Benedict D. surname: Rogers fullname: Rogers, Benedict D. organization: Modelling and Simulation Centre (MaSC), School of Mechanical, Aerospace and Civil Engineering, University of Manchester, Manchester M13 9PL, UK |
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| SubjectTerms | Boundaries Confined flows Deletion Free-surface flows Inlet/outlet Inlets Invariants Mathematical analysis Open boundaries Outlets Riemann invariants Segments Smoothed particle hydrodynamics Unsteady Unsteady flows |
| Title | Unsteady open boundaries for SPH using semi-analytical conditions and Riemann solver in 2D |
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