Analysis and DEM simulation of granular material flow patterns in hopper models of different shapes

2011 ◽  
Vol 22 (2) ◽  
pp. 226-235 ◽  
Author(s):  
R. Balevičius ◽  
R. Kačianauskas ◽  
Z. Mróz ◽  
I. Sielamowicz
Keyword(s):  
Granular Material ◽  
Material Flow ◽  
Flow Patterns ◽  
Dem Simulation ◽  
Different Shapes

Elimination of Vibrations in an Ore Unloading Bin

1974 ◽  
Vol 96 (3) ◽  
pp. 761-764 ◽  
Author(s):  
M. L. Wei ◽  
J. R. Johanson
Keyword(s):  
Granular Material ◽  
Flow Control ◽  
Material Flow ◽  
Natural Frequencies ◽  
Flow Patterns ◽  
Corrective Measures

Problems of undesirable vibrations in an ore unloading structure are described. Earlier unsuccessful attempts to eliminate vibrations by changing allegedly exciting frequencies mechanically and by increasing natural frequencies structurally are cited. Scientific evaluations of granular material flow patterns in the bin are presented, which identify possible causes of and methods to alleviate the vibrations. Finally, the corrective measures in flow control taken to eliminate vibrations are illustrated.

scholarly journals Effectiveness of a Snowboarding Simulation Using the Distinct Element Method

Proceedings ◽  
2020 ◽  
Vol 49 (1) ◽  
pp. 101
Author(s):  
Tatsuya Yoshida ◽  
Shogo Nakamura ◽  
Fumiyasu Kuratani
Keyword(s):  
Granular Material ◽  
Distinct Element ◽  
Simulation Method ◽  
Distinct Element Method ◽  
Simulation Methods ◽  
Test Results ◽  
Dem Simulation ◽  
Simulation Based ◽  
Different Shapes ◽  
Element Method

Some snowboarding simulation methods have been developed. Although snow has unique properties such as granular material and continuum, few snowboard simulation methods can reproduce the discrete behavior of snow. Conventional simulations are unsuitable for reproducing the characteristics of snow when ski and snowboard turns carve through snow and create grooves in it with their edges. We developed a snowboarding simulation based on the distinct element method (DEM) to reproduce the characteristics of snow and compare the results of the developed method with those of a conventional simulation method. The developed simulation was validated by comparing with the results of an experiment involving a few miniature snowboards of different shapes and a pseudo-snow slope. The turn trajectory and board posture predicted by the DEM simulation were closer to the test results than those predicted by the conventional simulation.

scholarly journals Response of granular-material flow to abrupt change of surface-shear force

1996 ◽  
Vol 40 ◽  
pp. 1045-1050
Author(s):  
Hitoshi GOTOH ◽  
Tetsuo SAKAI ◽  
Yasuharu TOYOTA ◽  
Atsushi SAKAI
Keyword(s):  
Granular Material ◽  
Material Flow ◽  
Shear Force ◽  
Abrupt Change ◽  
Surface Shear

Material Flow Behavior during Friction Stir Welding of Copper and Steel

2011 ◽  
Vol 138-139 ◽  
pp. 842-847 ◽  
Author(s):  
Chun Ping Huang ◽  
Wen Liang Chen ◽  
Li Ming Ke ◽  
Huang Lu
Keyword(s):  
Friction Stir Welding ◽  
Material Flow ◽  
Flow Behavior ◽  
Dissimilar Metals ◽  
Screw Thread ◽  
Friction Stir ◽  
Different Shapes ◽  
Welding Joints ◽  
Flow Morphology ◽  
Main Factor

The joining of dissimilar metals, T2 copper and Q235 mild steel was carried out by friction stir welding. The material flow of different shapes of the probe and different forms of welding joints were studied, the material flow behavior on different locations from the probe was also analyzed. The experimental results showed that the screw thread in probe is the main factor in driving material flow along the thickness direction of the weld during FSW of copper and steel, the flow morphology of the weld is significantly different with vary forms of welding joints, and the material flow on different locations from the probe are quite different from each other. Instantaneous cavity will form at the upper of the weld with the use of left screw thread probe during FSW, and if not promptly and adequate padding, it is prone to appear hole-type defects.

Continuum Modeling and Simulation of Robotic Appendage Interaction With Granular Material

2020 ◽  
Vol 88 (2) ◽  
Author(s):  
Guanjin Wang ◽  
Amir Riaz ◽  
Balakumar Balachandran
Keyword(s):  
Granular Material ◽  
Legged Locomotion ◽  
Granular System ◽  
Sph Method ◽  
Dynamic Interactions ◽  
Computational Framework ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Different Shapes ◽  
Large Wheel

Abstract Legged locomotion has advantages when one is navigating a flowable ground or a terrain with obstacles that are common in nature. With traditional terra-mechanics, one can capture large wheel–terrain interactions. However, legged motion on a granular substrate is difficult to investigate by using classical terra-mechanics due to sharp edge contact. Recent studies have shown that a continuum simulation can serve as an accurate tool for simulating dynamic interactions with granular material at laboratory and field scales. Spurred by this, a computational framework based on the smoothed particle hydrodynamics (SPH) method has been developed for the investigation of single robot appendage interaction with a granular system. This framework has been validated by using experimental results and extended to study robot appendages with different shapes and stride frequencies. The mechanics’ results are expected to help robot navigation and exploration in unknown and complex terrains.

scholarly journals Deformation of granular material flow in converging channels

2018 ◽  
Vol 206 ◽  
pp. 012004
Author(s):  
A P Bobryakov ◽  
S V Klishin ◽  
V P Kosykh ◽  
S V Lavrikov ◽  
O A Mikenina ◽  
...  
Keyword(s):  
Granular Material ◽  
Material Flow

K-1420 Analysis on Granular Flow Patterns in Standpipe : Comparison between DEM Simulation and Experiment

2001 ◽  
Vol II.01.1 (0) ◽  
pp. 243-244
Author(s):  
Toshihiro KAWAGUCHI ◽  
Mitsuhide OHKUBO ◽  
Toshitsugu TANAKA ◽  
Yutaka TSUJI
Keyword(s):  
Granular Flow ◽  
Flow Patterns ◽  
Dem Simulation ◽  
Simulation And Experiment
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