The gravity effects on the angle of repose of the sand were negligible. Two-dimensional discrete element method (DEM) was used to simulate the angle of repose. Results were compared to observations made during the low-gravity experiments. Effects of varying parameters such as the friction ...
Ghazavi M, Hosseini M, Mollanouri M (2008) A comparison between angle of repose and friction angle of sand. In: Proceedings of the 12th international conference of international association for computer methods and advances in geomechanics, Goa, India, pp 1272-1275Ghazavi, M., Hosseini, M.,...
Research on the angle of repose of natural sand DOI: 10.6040/j.issn.1671-9352.0.2014.360 周向玲, 麦麦提吐逊·阿布都热依木, 俞胜清, 李华振ZHOU Xiang-ling, muhammadtursun·ABUDUREYIM, YU Sheng-qing, LI Hua-zhen Keywords: 颗粒物质,崩塌角,沙粒,沙堆,静止角,sand,sand heap,static angle,...
Nevertheless, the slope angle in HS.6s is greater than the dry sand angle of repose (≈30°). This lets the sedimented sand to avalanche through the slot into the eroded gap, and the vane upper surface gets passively cleaned. The concise assessment of the SB behaviour is given in Fig. ...
Discrete element simulations of gravitational volcanic deformation: 2. Mechanical analysis Piles constructed above a strong, cohesive substrate that prevents basal slip develop outward dipping layers through particle avalanching down angle of repose ... JK Morgan,PJ Mcgovern - 《Journal of Geophysical Re...
The influence of granularity and composition of the dry-sand for EPC process on the Internal Friction Angle has been investigated, as well as ,the influence of the ratio of course area to pump area, granularity of the dry-sand, course length and their interaction on the permeability of sand...
This angle, which scientists call the angle of repose, is usually about 30 to 34 degrees. After enough sand builds up around an obstacle, the dune itself becomes the obstacle, and it continues to grow. Depending on the speed and direction of the wind and the weight of the local sand, ...
“Up until now, no one would have used these terms,” he says. “They didn’t exist. But to understand how these grains are flowing uphill, we calculated what the stresses are that cause them to move in that direction. If you have a negative angle of repose, then you must have...
We measure the dynamic angle of repose on Mars using HiRISE DTMs of active dune fields and find that decreased gravity does not have an effect on this angle. C Atwood-Stone,AS Mcewen 被引量: 9发表: 2013年 Numerical simulation of dynamic sand dunes The physics of granular materials is inte...
If the saltation driven by the main flow and the secondary flow, the surface creep due to gravity, and the slide occurring when the slope of sand surface is larger than the angle of repose are considered, the model can simulate the formation and development of sand dunes whose shape and ...