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Modified MPS method for the 2D Fluid structure interaction problem with free surface

Modified MPS method for the 2D Fluid structure interaction problem with free surface
Modified MPS method for the 2D Fluid structure interaction problem with free surface
As a Lagrangian mesh-free method, the Moving Particle Semi-implicit (MPS) method is very suitable for simulating violent flows, such as breaking waves on free surface. However, despite its wide range of applicability, the original MPS algorithm suffers from some inherent difficulties in obtaining an accurate fluid pressure in both spatial and time domain. Different modifications to improve the method have been proposed in the literature. In this paper, we propose the following modifications to improve the accuracy of pressure calculations and the stability of the method: i) A mixed source term in the pressure Poisson equation with no artificial term in the formulation, ii) New solid and free surface boundary handling methods, iii) Particle position shifting and collision handling, and iv) A new version of “cell-link” neighbour particle searching strategy, which reduces about 6.5/9 (?72%) of the searching area compared with traditional “cell-linked” algorithm.

The proposed modifications are verified and validated by some model free-surface flow problems, such as a two-dimensional dam break (with rigid and flexible structures on the impacting end - FSI model), liquid sloshing and ship cross section dropping problems. The numerical results obtained are found to be in good agreement with the available numerical or experimental results. With the proposed modifications, the stability and accuracy of the pressure field are improved in spatial and time domains.
moving particle semi-implicit (MPS) method, free surface flow, fluid structure interaction, slamming, sloshing, dam-break simulation
0045-7930
1-64
Sun, Zhe
59e9a029-3204-41bc-8543-faa8b25f4a4b
Djidjeli, K.
94ac4002-4170-495b-a443-74fde3b92998
Xing, Jing
d4fe7ae0-2668-422a-8d89-9e66527835ce
Cheng, Fai
4976692e-a800-4947-bfea-a93032eed29e
Sun, Zhe
59e9a029-3204-41bc-8543-faa8b25f4a4b
Djidjeli, K.
94ac4002-4170-495b-a443-74fde3b92998
Xing, Jing
d4fe7ae0-2668-422a-8d89-9e66527835ce
Cheng, Fai
4976692e-a800-4947-bfea-a93032eed29e

Sun, Zhe, Djidjeli, K., Xing, Jing and Cheng, Fai (2015) Modified MPS method for the 2D Fluid structure interaction problem with free surface. Computers & Fluids, 1-64. (doi:10.1016/j.compfluid.2015.08.017).

Record type: Article

Abstract

As a Lagrangian mesh-free method, the Moving Particle Semi-implicit (MPS) method is very suitable for simulating violent flows, such as breaking waves on free surface. However, despite its wide range of applicability, the original MPS algorithm suffers from some inherent difficulties in obtaining an accurate fluid pressure in both spatial and time domain. Different modifications to improve the method have been proposed in the literature. In this paper, we propose the following modifications to improve the accuracy of pressure calculations and the stability of the method: i) A mixed source term in the pressure Poisson equation with no artificial term in the formulation, ii) New solid and free surface boundary handling methods, iii) Particle position shifting and collision handling, and iv) A new version of “cell-link” neighbour particle searching strategy, which reduces about 6.5/9 (?72%) of the searching area compared with traditional “cell-linked” algorithm.

The proposed modifications are verified and validated by some model free-surface flow problems, such as a two-dimensional dam break (with rigid and flexible structures on the impacting end - FSI model), liquid sloshing and ship cross section dropping problems. The numerical results obtained are found to be in good agreement with the available numerical or experimental results. With the proposed modifications, the stability and accuracy of the pressure field are improved in spatial and time domains.

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More information

Accepted/In Press date: 14 August 2015
e-pub ahead of print date: 1 September 2015
Published date: 2015
Keywords: moving particle semi-implicit (MPS) method, free surface flow, fluid structure interaction, slamming, sloshing, dam-break simulation
Organisations: Faculty of Engineering and the Environment

Identifiers

Local EPrints ID: 381238
URI: http://eprints.soton.ac.uk/id/eprint/381238
ISSN: 0045-7930
PURE UUID: 3b50776f-0e1b-46eb-b292-9f80357bfcfa

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Date deposited: 09 Sep 2015 11:59
Last modified: 25 Nov 2019 20:31

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Contributors

Author: Zhe Sun
Author: K. Djidjeli
Author: Jing Xing
Author: Fai Cheng

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