2013 Fiscal Year Research-status Report
Development of an accurate and efficient particle method for practical simulations of multiphase fluid flows
| Project/Area Number |
25820224
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Research Institution | Kyoto University |
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Principal Investigator |
KHAYYER Abbas 京都大学, 工学(系)研究科(研究院), 准教授 (80534263)
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Keywords | Multiphase flows / particle method / accuracy and stability / computational efficiency |
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| Research Abstract |
The first aim of this research was to develop an accurate and reliable multiphase particle method for simulation of multiphase hydrodynamic flows. Up to now, an accurate multiphase particle method based on the Moving Particle Semi-implicit method is developed. The developed method benefits from a number of enhanced and carefully derived schemes, in particular, a novel scheme was developed for an accurate and consistent modeling of density at the phase interface.
The developed multiphase method was successfully verified by a number of verification tests including a few theoretical benchmark tests and some violent sloshing flows characterized by air entrapment/entrainment. The key feature of this developed code was its applicability for multiphase flows characterized by high density ratios (e.g. 1 to 1000). This success was achieved by applying meticulously derived numerical schemes without application of any artificial numerical stabilizers.
Detailed information and verification of this developed multiphase method was published in Journal of Computational Physics along with a number of international and domestic conference papers.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
The anticipated aim for 2013, development of an accurate, reliable multiphase particle method has already been achieved. The developed code is successfully verified and a number of publications/presentations have been conducted. The progress is evaluated to be rather smooth due to this achievement. The developed method has to be further enhanced by incorporating an accurate surface tension model. This issue is currently being considered simultaneous with the main aim of the second phase, i.e. parallelization and GPU-based implementation.
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| Strategy for Future Research Activity |
For the time being, and as it was previously planned, the major challenge for application of the developed method to practical engineering problems in full scale corresponds to the required computational load as well as memory. For this reason, the next considered step should be enhancement of computational efficiency by parallelization and GPU-based implementation.
In addition, several accurate sub-models (e.g. surface tension) have to be developed for a more reliable and precise simulation of multiphase hydrodynamic flows.
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[Presentation] An Enhanced Multiphase MPS Method for Simulation of Violent Sloshing Flows Characterized by Air Entrapment/Entrainment2013
Author(s)
Khayyer, A., Gotoh, H., Tsuruta, N., Kubota, H. and Yamamoto, K.
Organizer
International Sessions in Conference on Coastal Engineering, JSCE
Place of Presentation
Fukuoka, Japan
Year and Date
20131112-20131114
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