期刊
JOURNAL OF COMPUTATIONAL PHYSICS
卷 330, 期 -, 页码 221-244出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcp.2016.10.068
关键词
Non-intrusive; ROM; Compressible fluid solid coupling; Fracturing; Blasting
资金
- Janet Watson scholarship at Department of Earth Science and Engineering
- UK's Natural Environment Research Council [NER/A/S/2003/00595, NE/C52101X/1, NE/C51829X/1]
- Engineering and Physical Sciences Research Council [GR/R60898, EP/I00405X/1, EP/J002011/1]
- Imperial College High Performance Computing Service
- NSF/CMG [ATM-0931198]
- NSFC [11502241, 51479146]
- China Scholarship Council [201406290056]
- BP Exploration
- EPSRC MEMPHIS multi-phase flow programme grant [EP/K003976/1]
- EPSRC grant: Managing Air for Green Inner Cities (MAGIC) [EP/N010221/1]
- Engineering and Physical Sciences Research Council [EP/M012794/1, EP/R005761/1, EP/P013198/1, EP/N010221/1, EP/K003976/1, EP/I00405X/1, EP/J002011/1] Funding Source: researchfish
- Natural Environment Research Council [NER/A/S/2003/00595, NE/C51829X/1, NE/C52101X/1] Funding Source: researchfish
- EPSRC [EP/R005761/1, EP/J002011/1, EP/I00405X/1, EP/M012794/1, EP/P013198/1, EP/N010221/1, EP/K003976/1] Funding Source: UKRI
This work presents the first application of a non-intrusive reduced order method to model solid interacting with compressible fluid flows to simulate crack initiation and propagation. In the high fidelity model, the coupling process is achieved by introducing a source term into the momentum equation, which represents the effects of forces of the solid on the fluid. A combined single and smeared crack model with the Mohr Coulomb failure criterion is used to simulate crack initiation and propagation. The non-intrusive reduced order method is then applied to compressible fluid and fractured solid coupled modelling where the computational cost involved in the full high fidelity simulation is high. The non-intrusive reduced order model (NIROM) developed here is constructed through proper orthogonal decomposition (POD) and a radial basis function (RBF) multidimensional interpolation method. The performance of the NIROM for solid interacting with compressible fluid flows, in the presence of fracture models, is illustrated by two complex test cases: an immersed wall in a fluid and a blasting test case. The numerical simulation results show that the NIROM is capable of capturing the details of compressible fluids and fractured solids while the CPU time is reduced by several orders of magnitude. In addition, the issue of whether or not to subtract the mean from the snapshots before applying POD is discussed in this paper. It is shown that solutions of the NIROM, without mean subtracted before constructing the POD basis, captured more details than the NIROM with mean subtracted from snapshots. (C) 2016 Elsevier Inc. All rights reserved.
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