Unified wall boundary treatment for fluid-rigid body strong coupling in a particle method
Computational fluid dynamics has been widely used in the design and analysis of various fluid systems. The proper treatment of boundary conditions is crucial for the accurate simulation of fluid flow. However, in particle methods, such as smoothed particle hydrodynamics method and moving particle se...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
The Japan Society of Mechanical Engineers
2023-09-01
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| Series: | Mechanical Engineering Journal |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/mej/10/5/10_23-00127/_pdf/-char/en |
| _version_ | 1797659766471786496 |
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| author | Shugo MIYAMOTO Seiichi KOSHIZUKA |
| author_facet | Shugo MIYAMOTO Seiichi KOSHIZUKA |
| author_sort | Shugo MIYAMOTO |
| collection | DOAJ |
| description | Computational fluid dynamics has been widely used in the design and analysis of various fluid systems. The proper treatment of boundary conditions is crucial for the accurate simulation of fluid flow. However, in particle methods, such as smoothed particle hydrodynamics method and moving particle semi-implicit method, the treatment of boundary conditions has been a challenging problem. In this paper, starting from the incompressibility condition, we present a new theory for the unified treatment of both rigid bodies and wall boundaries, which allows the strong coupling of rigid bodies and incompressible fluids. Because the boundary models are based on signed distance functions and do not use particles, these models can avoid several problems, such as resolution dependence of particle representations, and unavoidable unevenness of surfaces. We also provide a way to efficiently handle rigid-body boundaries and wall boundaries without particles by finding the fundamental boundary weight function that does not change with time. Several numerical examples are presented to demonstrate the capability of our models and to compare them with theoretical and experimental results. |
| first_indexed | 2024-03-11T18:18:54Z |
| format | Article |
| id | doaj.art-36bf32680bcf474e8e5f5fe40fac8a4b |
| institution | Directory Open Access Journal |
| issn | 2187-9745 |
| language | English |
| last_indexed | 2024-03-11T18:18:54Z |
| publishDate | 2023-09-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Mechanical Engineering Journal |
| spelling | doaj.art-36bf32680bcf474e8e5f5fe40fac8a4b2023-10-16T02:43:37ZengThe Japan Society of Mechanical EngineersMechanical Engineering Journal2187-97452023-09-0110523-0012723-0012710.1299/mej.23-00127mejUnified wall boundary treatment for fluid-rigid body strong coupling in a particle methodShugo MIYAMOTO0Seiichi KOSHIZUKA1Department of Systems Innovation, School of Engineering, The University of TokyoDepartment of Systems Innovation, School of Engineering, The University of TokyoComputational fluid dynamics has been widely used in the design and analysis of various fluid systems. The proper treatment of boundary conditions is crucial for the accurate simulation of fluid flow. However, in particle methods, such as smoothed particle hydrodynamics method and moving particle semi-implicit method, the treatment of boundary conditions has been a challenging problem. In this paper, starting from the incompressibility condition, we present a new theory for the unified treatment of both rigid bodies and wall boundaries, which allows the strong coupling of rigid bodies and incompressible fluids. Because the boundary models are based on signed distance functions and do not use particles, these models can avoid several problems, such as resolution dependence of particle representations, and unavoidable unevenness of surfaces. We also provide a way to efficiently handle rigid-body boundaries and wall boundaries without particles by finding the fundamental boundary weight function that does not change with time. Several numerical examples are presented to demonstrate the capability of our models and to compare them with theoretical and experimental results.https://www.jstage.jst.go.jp/article/mej/10/5/10_23-00127/_pdf/-char/enmeshfree methodstrong couplingrigid bodyincompressible fluidwall boundarysigned distance field |
| spellingShingle | Shugo MIYAMOTO Seiichi KOSHIZUKA Unified wall boundary treatment for fluid-rigid body strong coupling in a particle method Mechanical Engineering Journal meshfree method strong coupling rigid body incompressible fluid wall boundary signed distance field |
| title | Unified wall boundary treatment for fluid-rigid body strong coupling in a particle method |
| title_full | Unified wall boundary treatment for fluid-rigid body strong coupling in a particle method |
| title_fullStr | Unified wall boundary treatment for fluid-rigid body strong coupling in a particle method |
| title_full_unstemmed | Unified wall boundary treatment for fluid-rigid body strong coupling in a particle method |
| title_short | Unified wall boundary treatment for fluid-rigid body strong coupling in a particle method |
| title_sort | unified wall boundary treatment for fluid rigid body strong coupling in a particle method |
| topic | meshfree method strong coupling rigid body incompressible fluid wall boundary signed distance field |
| url | https://www.jstage.jst.go.jp/article/mej/10/5/10_23-00127/_pdf/-char/en |
| work_keys_str_mv | AT shugomiyamoto unifiedwallboundarytreatmentforfluidrigidbodystrongcouplinginaparticlemethod AT seiichikoshizuka unifiedwallboundarytreatmentforfluidrigidbodystrongcouplinginaparticlemethod |