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Alternative TitleScaling principles of debris flow modeling using geotechnical centrifuge
宋东日1,2,3; 周公旦1,2; 白艺彤1,2; 胡洪森1,2
Source Publication岩土工程学报
Contribution Rank1
Other AbstractThe scale effect of debris flow hinders the in-depth understanding of debris flow dynamics.The geotechnical centrifuge can replicate the appropriate stress states of the prototype through an equivalent elevated centrifugal acceleration field.The geotechnical centrifuge provides a cost-effective solution for the scale effect of physical modelling of debris flows.Based on the existing dimensionless group of two-phase flows,a hierarchical scaling solution is proposed for the design of debris flow experiments in the centrifuge.It ensures that both the absolute values (i.e.,absolute stresses) and the relative values (characterized by the dimensionless group) in the model match those in the prototype,so that the fundamental physical processes in debris flows can be captured.Furthermore,the technical issues,the Coriolis effect and the influence of the real 1g gravitational acceleration,are quantitatively evaluated.To minimize these effects,a larger effective centrifuge radius and a lower angular velocity are recommended in the design of debris flow experiment using centrifuge.This study provides a significant theoretical and technical reference to the small-scale and large-scale physical modelling,and centrifuge modelling of debris flow problems.
Keyword泥石流 碎屑流 相似性准则 土工离心机 无量纲数 固-液耦合
Indexed ByEI ; CSCD
EI Accession NumberAccession number:20201108284092
Citation statistics
Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
Corresponding Author周公旦
Affiliation1.中国科学院、水利部成都山地灾害与环境研究所,四川 成都 610041;
2.中国科学院大学,北京 100049;
3.香港科技大学岩土工程离心机实验所,香港 999077
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
宋东日,周公旦,白艺彤,等. 土工离心机模拟泥石流问题的相似性考虑[J]. 岩土工程学报,2019,41(12):2262-2271.
APA 宋东日,周公旦,白艺彤,&胡洪森.(2019).土工离心机模拟泥石流问题的相似性考虑.岩土工程学报,41(12),2262-2271.
MLA 宋东日,et al."土工离心机模拟泥石流问题的相似性考虑".岩土工程学报 41.12(2019):2262-2271.
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