scholarly journals Multi-scale two-domain numerical modeling of stationary positive DC corona discharge/drift-region coupling

2021 ◽  
pp. 110517
Author(s):  
Nicolas Monrolin ◽  
Franck Plouraboué
Keyword(s):  
Numerical Modeling ◽  
Corona Discharge ◽  
Drift Region ◽  
Multi Scale

Passive Multi-Scale Alignment

2011 ◽  
Author(s):  
David O. Kazmer ◽  
Stephen P. Johnston ◽  
Mary E. Moriarty ◽  
Christopher Santeufemio
Keyword(s):  
Numerical Modeling ◽  
Ion Beam ◽  
Systematic Errors ◽  
Imprint Lithography ◽  
Physical Realization ◽  
Length Scales ◽  
Ion Beam Etching ◽  
Multi Scale ◽  
Kinematic Coupling ◽  
Multiple Length Scales

Methods are presented for self-alignment and assembly of objects with micron and nanometer-level features. The approach is a combination of kinematic coupling and elastic averaging in which mating alignment features spanning multiple length scales are successively brought into contact. When the objects are pressed together, the larger alignment features cause necessary deformation to ensure adequate alignment at the smaller length scales. Analytical and numerical modeling indicate that the largest alignment features can be designed to generally resolve global systematic errors while the smaller alignment features can correct local errors to achieve sub-micron alignment. Physical realization with ion beam etching, deposition, and thermal imprint lithography are also discussed.

scholarly journals Numerical modeling of residual stresses during vibratory peening of a 3-stage Blisk – a multi-scale discrete element and finite element approach

2022 ◽  
Vol 299 ◽  
pp. 117383
Author(s):  
Joselito Yam Alcaraz ◽  
Jing Zhang ◽  
Arun Prasanth Nagalingam ◽  
Sharan Kumar Gopasetty ◽  
Boon Loong Toh ◽  
...  
Keyword(s):  
Finite Element ◽  
Numerical Modeling ◽  
Residual Stresses ◽  
Discrete Element ◽  
Finite Element Approach ◽  
Multi Scale ◽  
Element Approach

Multi-scale Numerical Modeling of Radial Heat Transfer in Grooved Heat Pipe Evaporators

2008 ◽  
Vol 20 (3-4) ◽  
pp. 293-297 ◽  
Author(s):  
Séverine Rossomme ◽  
Cécile Goffaux ◽  
Koen Hillewaert ◽  
Pierre Colinet
Keyword(s):  
Heat Transfer ◽  
Numerical Modeling ◽  
Heat Pipe ◽  
Multi Scale ◽  
Radial Heat

Multi-Scale Simulations of Rearrangement Effects and Anisotropic Behaviour during Sintering

2006 ◽  
Vol 45 ◽  
pp. 530-538 ◽  
Author(s):  
Andreas Wonisch ◽  
Torsten Kraft ◽  
Hermann Riedel
Keyword(s):  
Numerical Modeling ◽  
Discrete Element Method ◽  
Crack Formation ◽  
Industrial Applications ◽  
Sintering Process ◽  
Densification Rate ◽  
Mesoscopic Scale ◽  
Multi Scale ◽  
Open Questions ◽  
Mechanical Models

Numerical modeling of sintering by continuum mechanical simulations is successfully applied today to predict e.g. the distortions developing during sintering. Several examples that demonstrate the possibilities of such simulations especially for industrial applications have been published recently. However, there are still open questions regarding the influence of grain rearrangement, crack formation and anisotropic starting configurations (e.g. due to prior compaction). By using the Discrete Element Method the sintering process can be investigated on a more fundamental mesoscopic scale. This method also considers effects due to particle rearrangement or anisotropic configurations as well as crack developments automatically. Their influence on various macroscopic properties like densification rate and viscosities is studied. Suggestions how to use these insights to improve existing continuum mechanical models are given.

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