TY - JOUR
T1 - Investigations of granular material behaviors using coupled Eulerian-Lagrangian technique
T2 - From granular collapse to fluid-structure interaction
AU - Lin, Cheng Han
AU - Hung, Ching
AU - Hsu, Tsai Yun
N1 - Funding Information:
The authors appreciate the Young Scholar Fellowship Program by the Ministry of Science and Technology, Taiwan: Grants 107-2636-E-006-003 and 108-2636-E-006-003. The research was, in part, supported by the Higher Education Sprout Project, Ministry of Education, Taiwan, Headquarters of University Advancement to the National Cheng Kung University, Taiwan. The authors would also like to express their gratitude to Professor Ronaldo I. Borja (Stanford University), who has provided valuable insights and thoughtful feedback that strengthened this work.
Funding Information:
The authors appreciate the Young Scholar Fellowship Program by the Ministry of Science and Technology , Taiwan: Grants 107-2636-E-006-003 and 108-2636-E-006-003 . The research was, in part, supported by the Higher Education Sprout Project, Ministry of Education, Taiwan, Headquarters of University Advancement to the National Cheng Kung University , Taiwan. The authors would also like to express their gratitude to Professor Ronaldo I. Borja (Stanford University), who has provided valuable insights and thoughtful feedback that strengthened this work.
PY - 2020/5
Y1 - 2020/5
N2 - In this study, a coupled Eulerian-Lagrangian (CEL) technique was used to investigate the dynamic behaviors of granular material, including the collapse of a granular column and the interaction between granular flow and a rigid barrier. The CEL technique, combining Eulerian and Lagrangian algorithms, is capable of overcoming mesh distortions of conventional finite element approaches. By validating well-established experiments, the development of progressive failure in the granular column can be accurately simulated using the equations of state (EOS) and Bingham plastic constitutive models, and the granular flow impact force on the rigid barrier based on the small-scale CEL model shows good agreement with the data measured in flume tests. The impact force simulated by the CEL technique was compared with the predictions of empirical hydrostatic and hydrodynamic models, which are the approaches generally used to estimate the granular flow impact force in engineering practice. In addition, a normalized parameter SVelocity was proposed to obtain a representative velocity and height of the granular flow from the CEL analysis to improve the accuracy of empirical approaches. The proposed parameter could benefit the in-situ monitoring of potential granular flow disasters and demonstrates the applicability of the CEL technique in practical engineering.
AB - In this study, a coupled Eulerian-Lagrangian (CEL) technique was used to investigate the dynamic behaviors of granular material, including the collapse of a granular column and the interaction between granular flow and a rigid barrier. The CEL technique, combining Eulerian and Lagrangian algorithms, is capable of overcoming mesh distortions of conventional finite element approaches. By validating well-established experiments, the development of progressive failure in the granular column can be accurately simulated using the equations of state (EOS) and Bingham plastic constitutive models, and the granular flow impact force on the rigid barrier based on the small-scale CEL model shows good agreement with the data measured in flume tests. The impact force simulated by the CEL technique was compared with the predictions of empirical hydrostatic and hydrodynamic models, which are the approaches generally used to estimate the granular flow impact force in engineering practice. In addition, a normalized parameter SVelocity was proposed to obtain a representative velocity and height of the granular flow from the CEL analysis to improve the accuracy of empirical approaches. The proposed parameter could benefit the in-situ monitoring of potential granular flow disasters and demonstrates the applicability of the CEL technique in practical engineering.
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U2 - 10.1016/j.compgeo.2020.103485
DO - 10.1016/j.compgeo.2020.103485
M3 - Article
AN - SCOPUS:85079876618
VL - 121
JO - Computers and Geotechnics
JF - Computers and Geotechnics
SN - 0266-352X
M1 - 103485
ER -