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ARTICLE
Numerical Study on Rock Breaking Mechanism of Supercritical CO2 Jet Based on Smoothed Particle Hydrodynamics
Xiaofeng Yang1, *, Yanhong Li1, Aiguo Nie1, Sheng Zhi2, Liyuan Liu3
1 School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing, 100083, China.
2 Department of Energy and Mineral Engineering, EMS Energy Institute and G3 Center, Pennsylvania State University, University Park, State College, PA 16802, USA.
3 School of Civil and Resource Engineering, University of Science & Technology Beijing, Beijing, China.
* Corresponding Author: Xiaofeng Yang. Email: .
(This article belongs to this Special Issue: Modeling and Simulation of Fluid flows in Fractured Porous Media: Current Trends and Prospects)
Computer Modeling in Engineering & Sciences 2020, 122(3), 1141-1157. https://doi.org/10.32604/cmes.2020.08538
Received 07 September 2019; Accepted 17 December 2019; Issue published 01 March 2020
Abstract
Supercritical carbon dioxide (Sc-CO
2) jet rock breaking is a nonlinear impact
dynamics problem involving many factors. Considering the complexity of the physical
properties of the Sc-CO
2 jet and the mesh distortion problem in dealing with large
deformation problems using the finite element method, the smoothed particle
hydrodynamics (SPH) method is used to simulate and analyze the rock breaking process
by Sc-CO
2 jet based on the derivation of the jet velocity-density evolution mathematical
model. The results indicate that there exisits an optimal rock breaking temperature by Sc-CO
2. The volume and length of the rock fracture increase with the rising of the jet
temperature but falls when the jet temperature exceeds 340 K. With more complicated
perforation shapes and larger fracture volumes, the Sc-CO
2 jet can yield a rock breaking
more effectively than water jet, The stress analysis shows that the Sc-CO
2 rock fracturing
process could be reasonably divided into three stages, namely the fracture accumulation
stage, the rapid failure stage, and the breaking stabilization stage. The high diffusivity of
Sc-CO
2 is identified as the primary cause of the stress fluctuation and W-shaped fracture
morphology. The simulated and calculated results are generally in conformity with the
published experimental data. This study provides theoretical guidance for further study
on Sc-CO
2 fracturing mechanism and rock breaking efficiency.
Keywords
Cite This Article
Yang, X., Li, Y., Nie, A., Zhi, S., Liu, L. (2020). Numerical Study on Rock Breaking Mechanism of Supercritical CO
2 Jet Based on Smoothed Particle Hydrodynamics.
CMES-Computer Modeling in Engineering & Sciences, 122(3), 1141–1157. https://doi.org/10.32604/cmes.2020.08538
Citations