期刊
JOURNAL OF COMPUTATIONAL PHYSICS
卷 336, 期 -, 页码 235-260出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcp.2017.01.046
关键词
Surrogate models; Metamodel; Dynamic kriging; Bayesian kriging; Multiscale; Particle-laden flows; Shocks; Drag
资金
- Air Force Office of Scientific Research [FA9550-12-1-0115]
- AFRL, Eglin AFB
Macro-scale computations of shocked particulate flows require closure laws that model the exchange of momentum energy between the fluid and particle phases. Closure laws are constructed in this work in the form of surrogate models derived from highly resolved mesoscale computations of shock-particle interactions. The mesoscale computations are performed to calculate the drag force on a cluster of particles for different values of Mach Number and particle volume fraction. Two Kriging-based methods, viz. the Dynamic Kriging Method (DKG) and the Modified Bayesian Kriging Method (MBKG) are evaluated for their ability to construct surrogate models with sparse data; i.e. using the least number of mesoscale simulations. It is shown that if the input data is noise-free, the DKG method converges monotonically; convergence is less robust in the presence of noise. The MBKG method converges monotonically even with noisy input data and is therefore more suitable for surrogate model construction from numerical experiments. This work is the first step towards a full multiscale modeling of interaction of shocked particle laden flows. (C) 2017 Elsevier Inc. All rights reserved.
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