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Title: Application of CE/SE method to gas-particle two-phase detonations under an Eulerian-Lagrangian framework
Authors: Zhang, Z
Wen, C 
Liu, Y
Zhang, D
Jiang, Z
Issue Date: Oct-2019
Source: Journal of computational physics, 1 Oct. 2019, v. 394, p. 18-40
Abstract: This study aims to extend the original Eulerian space-time conservation element and solution element (CE/SE)method to the Eulerian-Lagrangian framework to solve the gas-particle two-phase detonation problems. The gas-aluminum particle two-phase detonations are numerically investigated by the developed Eulerian-Lagrangian code, in which the gas-phase compressible Euler equations are solved by our in-house CE/SE scheme based on quadrilateral meshes. Additionally, the particle-phase Lagrangian equations, together with the stiff source terms of interphase interactions and chemical reactions, are explicitly integrated via the operator-splitting technique. A dynamic data structure is introduced to store particle information to overcome the tremendous communication costs when applying message passing interface parallel to the Eulerian-Lagrangian framework. The code is shown to be of better parallel efficiency in moderate-scale computations than that uses static arrays. Comparisons with previous one-dimensional and two-dimensional simulation results and experimental observations are conducted to demonstrate the accuracy and reliability of the developed Eulerian-Lagrangian CE/SE code in gas-particle two-phase detonation simulations. Moreover, the code is also applied to simulate polydisperse gas-particle detonations which is close to a realistic scenario, and significant differences in detonation characteristics are found when compared with the monodisperse counterparts. The great demands of using the Eulerian-Lagrangian method to obtain more physics-consistent gas-particle detonation results are addressed, which the traditional Eulerian-Eulerian simulations fail to observe.
Keywords: Aluminum-air detonation
CE/SE
Eulerian-Lagrangian
MPI
Two-phase detonation
Publisher: Academic Press
Journal: Journal of computational physics 
ISSN: 0021-9991
DOI: 10.1016/j.jcp.2019.05.025
Rights: © 2019 Elsevier Inc. All rights reserved.
©2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
The following publication Zhang, Z., Wen, C., Liu, Y., Zhang, D., & Jiang, Z. (2019). Application of CE/SE method to gas-particle two-phase detonations under an Eulerian-Lagrangian framework. Journal of Computational Physics, 394, 18-40 is available at https://doi.org/10.1016/j.jcp.2019.05.025.
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