NUMERICAL SIMULATION RESEARCH ON THE TRANSONIC AEROELASTICITY OF A HIGH-ASPECT-RATIO WING

2015 ◽  
Vol 33 (4) ◽  
pp. 173-180
Author(s):  
Hongtao Guo ◽  
Guoshuai Li ◽  
Dehua Chen ◽  
Bo Lu
Keyword(s):  
Numerical Simulation ◽  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Simulation Research

Numerical Simulation of High-Aspect-Ratio Micro-Hole Electroforming with External Magnetic Field

2010 ◽  
Vol 42 ◽  
pp. 13-16
Author(s):  
Wei Li ◽  
Ping Mei Ming ◽  
Wu Ji Jiang ◽  
Yin Ding Lv
Keyword(s):  
Magnetic Field ◽  
Numerical Simulation ◽  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Flow State ◽  
Cathode Electrode ◽  
Micro Hole ◽  
Fluent Software ◽  
The Magnetic Field ◽  
Enhance Mass

In this paper, the influences of applied magnetic field on flow state during electroforming of the high-aspect-ratio (HAR) blind micro-hole were numerically analyzed using the Fluent software. The results showed that, when microelectroforming of nickel without external agitation, three vortexes could form due to the magnetohydrodynamic (MHD) effect within the HAR micro-hole with magnetic field in parallel to cathode-electrode surface, and the flow rate in the micro-hole increased with the increase of the magnetic field and current density. The MHD effect helped to enhance mass transfer during the microelectroforming of HAR microstructures.

Multi-scale hybrid numerical simulation of the growth of high-aspect-ratio nanostructures

2008 ◽  
Vol 44 (1) ◽  
pp. 9-15 ◽  
Author(s):  
E. Tam ◽  
K. Ostrikov ◽  
I. Levchenko ◽  
M. Keidar ◽  
S. Xu
Keyword(s):  
Numerical Simulation ◽  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Multi Scale

Numerical simulation of x-ray zone plates with high aspect ratio

1995 ◽  
Author(s):  
Yuri V. Kopylov ◽  
Alexei V. Popov ◽  
Alexander V. Vinogradov
Keyword(s):  
Numerical Simulation ◽  
Aspect Ratio ◽  
High Aspect Ratio ◽  
X Ray ◽  
Zone Plates

scholarly journals Longitudinal Aerodynamic and Stability Characteristics of High-Aspect-Ratio Unmanned Aerial Vehicles in Gust Response

2019 ◽  
Author(s):  
Junli Wang ◽  
Wensheng Zhang ◽  
Bolin Feng ◽  
Zhigui Ren ◽  
Qinghe Zhao
Keyword(s):  
Numerical Simulation ◽  
Aspect Ratio ◽  
Unmanned Aerial Vehicles ◽  
High Aspect Ratio ◽  
Stability Margin ◽  
Simulation Method ◽  
Static Stability ◽  
Aerial Vehicles ◽  
Numerical Simulation Method ◽  
Gust Response

The aim of this work is to propose an accurate and reliable numerical simulation method of gust response, so as to analyze longitudinal stability characteristics of high-aspect-ratio unmanned aerial vehicles (UAVs) under gust response. Based on the dual-time stepping method, the unsteady Navies-Stokes equation was solved. By introducing grid velocity to study the effects of gust, the numerical simulation of gust response was realized. Moreover, the numerical simulation method was verified to be accurate by using the theoretical value and reference value obtained in previous research. The calculation results of the high-aspect-ratio UAV under the 1-cos gust reveal that longitudinal aerodynamic forces of high-aspect-ratio UAVs changed. In the whole range of gust gradient length, the UAVs were always in the state of static stability. However, with the increase of gust velocity, static stability margin decreased. The numerical simulation method of gusts established in this study preferably overcomes the possible numerical oscillations and divergence problems caused by excessive gust velocity. The analysis on longitudinal static stability and stability margin of high-aspect-ratio UAVs under the effects of gusts can ensure flight quality and safety of UAVs under the effects of gusts.

Numerical simulation on nitrogen condensation in high aspect ratio mini-channels

2020 ◽  
Vol 117 ◽  
pp. 190-197
Author(s):  
Daming Sun ◽  
Shaocong Qin ◽  
Qie Shen ◽  
Shiyue Su ◽  
Shenghui Lei
Keyword(s):  
Numerical Simulation ◽  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Mini Channels

Numerical Simulation of Laser Beam Propagation in High Aspect Ratio Channel

2009 ◽  
Author(s):  
Benxin Wu ◽  
Sha Tao ◽  
Shuting Lei
Keyword(s):  
Numerical Simulation ◽  
Aspect Ratio ◽  
Laser Beam ◽  
Process Design ◽  
High Aspect Ratio ◽  
Beam Propagation ◽  
Laser Machining ◽  
Laser Beam Propagation ◽  
Polarization Direction ◽  
The Finite Element Method

Laser beam propagation in high aspect ratio channels has been simulated by solving two-dimensional Maxwell wave equation with the finite element method. It has been found that the optical polarization direction has a very important effect on laser beam propagation in the channel, and under certain polarization direction the laser beam profile may keep changing in a very complicated way as the beam propagates through the channel. The above important effects, revealed by the numerical simulation in this paper, need to be considered to realize an accurate modeling or a good process design for laser machining of high aspect ratio microstructures.

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