scholarly journals Probing nanocrystalline grain dynamics in nanodevices

2017 ◽  
Vol 3 (6) ◽  
pp. e1700135 ◽  
Author(s):  
Sheng-Shiuan Yeh ◽  
Wen-Yao Chang ◽  
Juhn-Jong Lin
Keyword(s):  
Grain Dynamics

scholarly journals The grain dynamics and structures of debris discs

2011 ◽  
Vol 16 ◽  
pp. 05006
Author(s):  
L.-C. Yeh ◽  
I.-G. Jiang
Keyword(s):  
Grain Dynamics

Recent Progress on Planetary Dust Grain Dynamics

2007 ◽  
Author(s):  
J. E. Howard ◽  
Michail D. Todorov
Keyword(s):  
Recent Progress ◽  
Dust Grain ◽  
Grain Dynamics

A FAST STOCKPILE SIMULATION ENGINE AND ITS APPLICATION IN MINERAL ORE HANDLING

2013 ◽  
Vol 04 (02) ◽  
pp. 1250031
Author(s):  
TIEN-FU LU ◽  
SHIHONG XU
Keyword(s):  
Cellular Automata ◽  
Real Time ◽  
Quality Information ◽  
Digital Information ◽  
Fast Simulation ◽  
Simulation Engine ◽  
Time Simulation ◽  
Material Process ◽  
Operation Cost ◽  
Grain Dynamics

This paper presents structures and principles of a fast stockpile simulation engine that enhances automatic material process by providing accurate digital information of material quality distribution within stockpiles. Compared with traditional measurement-based approaches, our simulation technology reduces operation cost by eliminating frequent physical measuring; improves operation accuracy through all-time whole-area contour simulation (instead of measuring a few positions of material layers now and then); and speeds the process through fast simulation and instant response to quality information query. Based on simplified grain dynamics and cellular automata models, the technology can achieve real-time/super-real-time simulation, which is critical to be adopted by the industry. Application of the technology in analyzing mineral ores handling is also discussed.

scholarly journals Small dust grain dynamics on adaptive mesh refinement grids

2019 ◽  
Vol 626 ◽  
pp. A96 ◽  
Author(s):  
U. Lebreuilly ◽  
B. Commerçon ◽  
G. Laibe
Keyword(s):  
Finite Volume ◽  
Adaptive Mesh Refinement ◽  
Mesh Refinement ◽  
Adaptive Mesh ◽  
Uniform Grids ◽  
Dust Dynamics ◽  
Protostellar Collapse ◽  
Dust Grain ◽  
Grain Dynamics ◽  
Small Dust

Context. Small dust grains are essential ingredients of star, disk and planet formation. Aims. We present an Eulerian numerical approach to study small dust grain dynamics in the context of star and protoplanetary disk formation. It is designed for finite volume codes. We use it to investigate dust dynamics during the protostellar collapse. Methods. We present a method to solve the monofluid equations of gas and dust mixtures with several dust species in the diffusion approximation implemented in the adaptive-mesh-refinement code RAMSES. It uses a finite volume second-order Godunov method with a predictor-corrector MUSCL scheme to estimate the fluxes between the grid cells. Results. We benchmark our method against six distinct tests, DUSTYADVECT, DUSTYDIFFUSE, DUSTYSHOCK, DUSTYWAVE, SETTLING, and DUSTYCOLLAPSE. We show that the scheme is second-order accurate in space on uniform grids and intermediate between second- and first-order on non-uniform grids. We apply our method on various DUSTYCOLLAPSE simulations of 1 M⊙ cores composed of gas and dust. Conclusions. We developed an efficient approach to treat gas and dust dynamics in the diffusion regime on grid-based codes. The canonical tests were successfully passed. In the context of protostellar collapse, we show that dust is less coupled to the gas in the outer regions of the collapse where grains larger than ≃100 μm fall significantly faster than the gas.

Kinetic Description of Dusty Plasmas and Problems of Grain Dynamics

2001 ◽  
Vol 41 (2-3) ◽  
pp. 211-214 ◽  
Author(s):  
P.P.J.M. Schram ◽  
A.G. Sitenko ◽  
S.A. Trigger ◽  
A.G. Zagorodny
Keyword(s):  
Dusty Plasmas ◽  
Kinetic Description ◽  
Grain Dynamics

The 3-dimensional X-ray diffraction microscope: 3D maps of grains and grain dynamics in polycrystalline materials

2003 ◽  
Vol 104 ◽  
pp. 495-498 ◽  
Author(s):  
E. M. Lauridsen ◽  
S. F. Nielsen ◽  
L. Margulies ◽  
S. Schmidt ◽  
H. F. Poulsen ◽  
...  
Keyword(s):  
Polycrystalline Materials ◽  
X Ray Diffraction ◽  
X Ray ◽  
3 Dimensional ◽  
Grain Dynamics
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