文献类型：期刊文献

英文题名：Three dimensional gas dispersion modeling using cellular automata and artificial neural network in urban environment

作者：Wang, Bing[1];Qian, Feng[1]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Control & Optimizat Chem Proc, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2018

卷号：120

起止页码：286

外文期刊名：PROCESS SAFETY AND ENVIRONMENTAL PROTECTION

收录：;EI(收录号：20184005890660);WOS:【SCI-EXPANDED(收录号:WOS:000462955600029)】；

基金：The author gratefully acknowledge the constructive discussion with Prof. Yang Tang in the development of the model. We would also like to acknowledge the primary financial support provided by National Science Foundation of China (Grant No. 21706069) and the Fundamental Research Funds for the Central Universities (Grant No. 222201814039).

语种：英文

外文关键词：Cellular automata; Artificial neural network; Consequence modeling; Fire dynamic simulators

摘要：The gas dispersion simulation in complex urban environment posts challenges on consequence analysis. Though computational fluid dynamics (CFD) are general approaches to provide building-resolving estimates, the time consuming calculation and complex process of modeling limit their application for emergency response. In this paper, a cellular automata dispersion model is prompted to simulate continuous point release of propane in 3-D domain with ground obstructions. An artificial neural network is employed to calculate the temporal state transition of cellular automata. To provide data for the neural network to train, fire dynamic simulator (FDS) code is adopted to simulate 100 scenarios of propane release from a fixed position in pre-specific domain with different combinations of meteorological conditions and source parameters. A proportion of the simulation results is selected to train the artificial neural network with different transition rules derived from the advection-diffusion equation. The dispersion processes are eventually replicated with the proposed approach on the remaining scenarios that the artificial neural network has never encountered. Provided with detailed meteorological field data, the cellular automata model could calculate the gas dispersion process about 1.5 times faster than FDS. As to the model performance, in the long term evolution, decreases in model accuracy are observed due to the nature of cellular automata in explicit evolution and the unavailability of error compensation methods. The transition rule that takes source terms into consideration outperforms in estimating the concentration distributions. (C) 2018 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.