scholarly journals Numerical simulation of leaking hydrogen dispersion behavior in a partially open space

2008 ◽  
Author(s):  
K. Matsuura ◽  
H. Kanayama ◽  
H. Tsukikawa ◽  
M. Inoue
Keyword(s):  
Numerical Simulation ◽  
Open Space ◽  
Dispersion Behavior

Numerical simulation of leaking hydrogen dispersion behavior in a partially open space

2008 ◽  
Vol 33 (1) ◽  
pp. 240-247 ◽  
Author(s):  
K MATSUURA ◽  
H KANAYAMA ◽  
H TSUKIKAWA ◽  
M INOUE
Keyword(s):  
Numerical Simulation ◽  
Open Space ◽  
Dispersion Behavior

scholarly journals Numerical Simulation of the Hydrogen Dispersion Behavior by a Parallel Characteristic Curve Method

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Qinghe Yao ◽  
Xin Pan ◽  
Qingyong Zhu
Keyword(s):  
Numerical Simulation ◽  
Open Space ◽  
Stokes Equations ◽  
Characteristic Curve ◽  
Dilution Effect ◽  
Transient Behavior ◽  
Boussinesq Approximation ◽  
Dispersion Behavior ◽  
Parallel Characteristic ◽  
Curve Method

A parallel characteristic curve method is applied in domain decomposition system to simulate the dispersion behavior of hydrogen in this work. The characteristic curve method is employed to approximate the Navier-Stokes equations and the convection diffusion equation, and the feasibility of solving complex multicomponent flow problems is demonstrated by the numerical simulation of hydrogen dispersion in a partially open space. An analogy of the Boussinesq approximation is applied and numerical results are validated by comparing them with the experimental data. The dilution effect of ventilation is investigated. The transient behavior of hydrogen and the process of accumulation in the partially open space are discussed.

Applying Numerical Simulation for Emergency Evacuation in Architectural Engineering

2012 ◽  
Vol 174-177 ◽  
pp. 3420-3423
Author(s):  
Xiao Chun Zhang ◽  
Chun Ma ◽  
Wei Ping Chen ◽  
Shui Fen Zhan
Keyword(s):  
Numerical Simulation ◽  
Emergency Response ◽  
Open Space ◽  
Maximum Velocity ◽  
Vertical Gradient ◽  
Emergency Evacuation ◽  
Building Site ◽  
Architectural Engineering ◽  
Crowd Density ◽  
Vertical Evacuation

This study applies numerical simulation for emergency evacuation in architectural engineering. The study considered a series of models for simulating emergency evacuation in architectural engineering. The results showed that the time of emergency evacuation relates to maximum velocity and crowd density through horizontal open space, and relates to vertical gradient under vertical evacuation. It was concluded that the risk of emergency response for architectural engineering connected with evacuating capability of builders and circumstance of building site.

Numerical Simulation of Thermobaric Explosive Explosion in Free Field

2014 ◽  
Vol 687-691 ◽  
pp. 696-700
Author(s):  
Xi Li ◽  
Bo Liang Wang ◽  
Zao Han ◽  
Ning Ning Zhao
Keyword(s):  
Numerical Simulation ◽  
Open Space ◽  
Peak Pressure ◽  
Free Field ◽  
Field Performance ◽  
Simulation Method ◽  
Blast Waves ◽  
Detonation Waves ◽  
Experiment Data ◽  
Detonation Products

In order to analyze the explosion characteristics on the free field performance of thermobaric explosive, parameters of blast waves produced by the investigated charges in an open space were measured by the use of piezoelectric sensors and the results were compared to traditional TNT. Moreover, a numerical simulation of TBE explosion in free field was performed within the frame of AUTODYN. Comparison with TNT reveals that the values of peak pressure and impulse of TBE are higher than that of TNT due to the secondary reaction of Al and detonation products. It is found that the simulation results of TBE detonation blast wave parameters coincided very well with the experiment data. This demonstrates that the simulation method used is an effective way to depict the spreading of detonation waves in free field for TBE.

F13 Numerical Simulation of Unsteady Hydrogen Dispersion in a Partially Open Space

2006 ◽  
Vol 2006.19 (0) ◽  
pp. 17-18
Author(s):  
Kazuo MATSUURA ◽  
Hiroshi KANAYAMA ◽  
Masahiro INOUE
Keyword(s):  
Numerical Simulation ◽  
Open Space
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