Numerical Analysis on Physical Property Change around Flame in Fire Whirl Generation

2018 ◽  
Vol 2018 (0) ◽  
pp. 0028
Author(s):  
Shoma Shimizu ◽  
Miyuki Hayashi ◽  
Yusaku Nishimura ◽  
Genichiro Kushida
Keyword(s):  
Numerical Analysis ◽  
Physical Property ◽  
Property Change ◽  
Fire Whirl ◽  
In Fire

Numerical Analysis of Fire Behavior of a Large Space Pre-Stressed Steel Structure under Fire

2011 ◽  
Vol 71-78 ◽  
pp. 3729-3732
Author(s):  
Ming Zhou ◽  
Zhi Guo Xie ◽  
Xin Tang Wang
Keyword(s):  
Numerical Analysis ◽  
Fire Behavior ◽  
Thermal Response ◽  
Structural Response ◽  
Steel Structure ◽  
Large Space ◽  
Fire Source ◽  
Lattice Shell ◽  
In Fire ◽  
Influence Degree

The computational model of numerical analysis of a suspended pre-stressed steel reticulated shell subjected to fire load is established with using the software Marc. Based on the model presented here, numerical analysis of thermal response and structural response of the pre-stressed steel structure are computed. The different space height and different rise-span ratio are considered for analysis of response temperature, displacements and stresses of the pre-stressed lattice shell under fire for one fire source. It is also shown that displacement of the node right above the inner cable is the maximum among the four nodes presented here as the fire source is located at the position right below the second-ring cable of the structure. It is concluded that the influence degree of space height of the structure on the fire response of the structure is not great, but rise-span ratio has obvious and great effect on displacements and stresses of the pre-stressed steel structure with large span in fire.

Physical property change of heavily neutron-irradiated Si3N4 and SiC by thermal annealing

2001 ◽  
Vol 289 (1-2) ◽  
pp. 102-109 ◽  
Author(s):  
Toyohiko Yano ◽  
Masafumi Akiyoshi ◽  
Kohki Ichikawa ◽  
Yoshiaki Tachi ◽  
Takayoshi Iseki
Keyword(s):  
Thermal Annealing ◽  
Physical Property ◽  
Property Change

Simulation of Vorticity-Buoyancy Interactions in Fire-Whirl-Like Phenomena

2003 ◽  
Author(s):  
J. M. McDonough ◽  
Andrew Loh
Keyword(s):  
Laboratory Experiment ◽  
Fire Whirl ◽  
In Fire

In this study the commercial flow code STAR-CD has been used to simulate a laboratory experiment involving a so-called fire whirl. Such phenomena are typically characterized as exhibiting significantly enhanced mixing and consequently higher combustion rates due to an interaction of buoyancy and vorticity, but the details of this are only beginning to be understood. The present study focuses attention on this interaction in the absence of combustion, thus removing significant complications and allowing a clearer view of the vorticity-buoyancy interaction itself.

scholarly journals Experimental and Numerical Analysis of Gypsum Plasterboards in Fire

2009 ◽  
Vol 46 (1) ◽  
pp. 149-167 ◽  
Author(s):  
Andrea Frangi ◽  
Vanessa Schleifer ◽  
Mario Fontana ◽  
Erich Hugi
Keyword(s):  
Numerical Analysis ◽  
In Fire

scholarly journals Numerical analysis of composite steel and concrete beams subjected to fire under different support conditions

2020 ◽  
Vol 13 (5) ◽  
Author(s):  
Lucas Coscia Romagnoli ◽  
Valdir Pignatta e Silva
Keyword(s):  
Thermal Expansion ◽  
Numerical Analysis ◽  
Concrete Beams ◽  
Numerical Models ◽  
Composite Beams ◽  
Design Code ◽  
Simply Supported ◽  
Support Conditions ◽  
In Fire ◽  
Abaqus Software

abstract: To evaluate the behavior of semi-continuous composite beams in fire, six finite elements numerical models with several steel profiles and slab dimensions were developed in ABAQUS software. The models took into account several behaviors usually suppressed in simplified analyzes such as: geometric and materials non-linearity properties and thermal expansion effects, including indirect stresses. Three support conditions were analyzed: simply supported (axial released), axial restrained and semi-continuous, totaling 18 analyzes. The different support conditions results were compared to each other and to the fire resistance time designed by simplified methods, which followed design code recommendations.

Numerical Analysis of Fire Performance of a Spacial Pre-Stressed Steel Structure in Fire

2013 ◽  
Vol 790 ◽  
pp. 189-192
Author(s):  
Tian Hong Wang ◽  
Jin Can Xu ◽  
Hai Lun Tong ◽  
Xin Tang Wang
Keyword(s):  
Thermal Expansion ◽  
Numerical Analysis ◽  
Numerical Model ◽  
Stress Relaxation ◽  
Thermal Response ◽  
Structural Response ◽  
Steel Structure ◽  
Fire Performance ◽  
Maximum Value ◽  
In Fire

The numerical model of analysis of fire performance of a spatial pre-stressed steel structure with large span was established based on the software Marc. The thermal response and structural response of the pre-stressed steel structure was computed for some nodes of the structure in fire. The different fire scenes were considered for analysis of response temperature, displacements and stresses of the nodes of the pre-stressed steel structure.It is concluded that the temperature rise of the nodes of the structure is far behind that of air near the nodes, however they are quite close as the fire lasted for 3600s and almost the same after 7200s.The results show that the displacement of the node right above the inner cable is the maximum and the node above the outer cable has the smallest value of displacement and the maximum value is about two and half times as large as the minimum.The results show that the reason why the cables are out of work is that the equilibrium between the cables and the rods of the structure is lost, but not that the stress relaxation caused by thermal expansion make the cables out of work.

scholarly journals A microfluidic-based bubble generation platform enables analysis of physical property change in phospholipid surfactant layers by interfacial ozone reaction

Lab on a Chip ◽  
2012 ◽  
Vol 12 (24) ◽  
pp. 5243 ◽  
Author(s):  
Young Shik Shin ◽  
Tae Su Choi ◽  
Hyungjun Kim ◽  
J. L. Beauchamp ◽  
James R. Heath ◽  
...  
Keyword(s):  
Physical Property ◽  
Bubble Generation ◽  
Property Change
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