Numerical Simulation Analysis of Smoke Control and Flow for Large Building Fire

2014 ◽  
Vol 608-609 ◽  
pp. 61-65
Author(s):  
Da You ◽  
Xiao Zhi Wang ◽  
Wen Jiang Chen ◽  
Gui Xiang Wu
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Simulation Software ◽  
Double Precision ◽  
Actual Situation ◽  
Smoke Control ◽  
Fire Temperature ◽  
Building Fire ◽  
Engineering Software ◽  
Large Building

In fluid numerical simulation calculation, FLUENT is one of the most commonly used engineering software. By the way of pressure velocity coupling, FLUENT can solve the flow field, and use the finite volume method to speed up the convergence. In order to improve the calculation accuracy, FLUENT is divided into single precision and double precision to meet the need of practical engineering. In this paper, by using FLUENT numerical simulation software, combined with UDF programming, we analyze the temperature and smoke distribution when large building fire occurs. The GAMBIT software is used for the numerical modeling, and we use Tecplot software to carry out the post processing of results. Through numerical simulation, the fire temperature value reaches 1050K without wind, while with wind the temperature is 1030K, , which is consistent with the actual situation. In the absence of ventilation condition, concentration is 0.0112; under the condition of ventilation concentration is 0.0052, which is consistent with the actual situation. Therefore in the building fire safety, the first thing to consider is ventilation, which can reduce the fire temperature and concentration and security personnel safe evacuation.

Numerical Simulation Analysis on Cold Closed-Die Forging of Differential Satellite Gear in Car

2008 ◽  
Vol 575-578 ◽  
pp. 517-524 ◽  
Author(s):  
Yao Zong Zhang ◽  
Jian Bo Huang ◽  
Xue Lin ◽  
Quan Shui Fang
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Simulation Software ◽  
Bevel Gear ◽  
Cold Forging ◽  
Forging Process ◽  
Die Forging ◽  
Closed Die Forging ◽  
Forming Defects ◽  
Deform 3D

The cold closed-die forging process of the gear is a kind of new technique of the precise forming of gear in recent years. In this paper, the cold closed-die forging process of differential satellite gear in car was analyzed through numerical simulation method. Forming mold was designed with Pro/E Wildfire2.0 which included four components : upper punch, lower punch, tooth shape upper die and lower die for Normal Cone. The three-dimensional models of satellite bevel gear mould were built and imported into numerical simulation software DEFORM-3D. Because the gear has the uniform circumferential features, in order to save time and improve the accuracy, only one tooth was simulated, and the full simulation outcome of 10 teeth was mirrored from this one. Through the numerical simulation analysis of DEFORM-3D, the instantaneous deformation and stress filed were gained. Forming defects were forecasted and the cold closed-die forging rule for satellite gear used in car was obtained which can provide effective references for no-flash cold forging process of planet bevel gear and the mold design.

Smoke Control Models in Building Fire: A Literature Review

2012 ◽  
Vol 193-194 ◽  
pp. 1134-1137
Author(s):  
Xu Tao Zhang ◽  
Song Ling Wang
Keyword(s):  
Numerical Simulation ◽  
Field Model ◽  
Simulation Models ◽  
Analytical Models ◽  
Zone Model ◽  
Smoke Control ◽  
Smoke Movement ◽  
Building Fire ◽  
Fire Scenarios ◽  
Weak Points

The smoke control is of great importance for the life safety of the occupants in the building fire. Many analytical models have been studied for the design of smoke control. The objective of the article is to bring several numerical simulation models about building fire and smoke movement. There are generally three kinds of different models, which are net model, zone model and field model. The characteristics and weak points of each category are discussed, indicating that each model might be applicable to different building fire scenarios.

Fluid-Solid Coupling Numerical Simulation Analysis of Impermeable Rock Mining Seam Floor Failure

2014 ◽  
Vol 1010-1012 ◽  
pp. 1527-1530
Author(s):  
Chun Jie Song ◽  
Cheng Fan
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Water Inrush ◽  
Three Dimensional ◽  
Deep Understanding ◽  
Simulation Method ◽  
Relevant Information ◽  
Simulation Software ◽  
Pressurized Water ◽  
Floor Failure

Based on a deep understanding of FLAC 3D numerical simulation software and the solid-liquid coupling theory and calculation method, this paper established a mining three-dimensional mechanical model under the pressurized water .Using the numerical simulation method, this paper systematically analysis deformation Laws of stress distribution of mining floor, bottom stress, its plastic zone and floor failure depth. By analyzing water inrush flow-solid coupling seepage problem under the conditions of coal mining, and compares with relevant information, verify the rationality of the existing theories and engineering measures, provide a theoretical basis for seeking security and economic exploitation of technical measures.

Numerical Simulation of Cathodic Protection Potential Distribution of Coastal Power Plant Condenser Based on Physical Scale Model

2014 ◽  
Vol 644-650 ◽  
pp. 3734-3738
Author(s):  
Peng Zhang ◽  
Juan Zhao ◽  
Gui Wang
Keyword(s):  
Numerical Simulation ◽  
Power Plant ◽  
Cathodic Protection ◽  
Potential Distribution ◽  
Simulation Analysis ◽  
Simulation Software ◽  
Scale Model ◽  
Physical Scale ◽  
Finite Element Numerical Simulation ◽  
Protection Potential

Finite element numerical simulation software was used for numerical simulation analysis of cathodic protection of coastal power plant condenser based on physical scale model. The effects of location, size and number of auxiliary anode on the cathodic protection potential distribution of the condenser were studied, which would predict cathodic protection result of the condenser and provide reasonable design for cathodic protection of the condenser.

Numerical Simulation Analysis of Ink Temperature Field in the Printing Process

2015 ◽  
Vol 775 ◽  
pp. 125-129
Author(s):  
Wei Huang ◽  
Hong Yan Chu ◽  
Li Gang Cai
Keyword(s):  
Numerical Simulation ◽  
Temperature Field ◽  
Simulation Analysis ◽  
Simulation Software ◽  
Fluid Simulation ◽  
Printing Press ◽  
Printing Process ◽  
Printing Quality ◽  
Main Factor

Ink is one of the important material in printing process, its features, to a great extent, decide the printing quality, and ink viscosity is one of the main parameters, the value of the ink viscosity directly affects the quality of printing. In the case of other conditions are determined, the main factor of influencing the ink viscosity is temperature. In this paper, by using the Workbench CFX fluid simulation software, the ink temperature field of two extrusion ink rollers in printing press is analyzed by numerical simulation , the influence of the ink roller speed on ink temperature and the influence of ink roller thermal conductivity on the ink temperature are analyzed,.

Numerical Simulation Analysis of the Nanyangpo Coal Mine Anchor Support Method

2012 ◽  
Vol 619 ◽  
pp. 231-238
Author(s):  
Mei Chang Zhang ◽  
Peng Cheng Fei ◽  
De Long Zou
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Simulation Software ◽  
Surrounding Rock ◽  
Nursing Program ◽  
Load Carrying ◽  
Deformation Law ◽  
The Stability ◽  
Surrounding Rock Deformation ◽  
Bolt Support

The bolt support is important to ensure the stability of surrounding rock. Of Nan Yangpo mines as the research background. The application of numerical simulation software FLAC3D mine deep Bolt bolt support after the surrounding rock deformation law of the numerical simulation, Comparison and analysis of rock displacement and plastic zone under the support program changes. The results show that, The third bolt support nursing program, Significantly improve the strength and load carrying capacity of the surrounding rock, Effectively control the damage of the deep tunnel deformation that can control the roof of 4101 the return airway and two to help the stability.

Numerical Simulation Analysis of Heat and Mass Transfer during Drying of Jujubes

2012 ◽  
Vol 468-471 ◽  
pp. 2323-2327
Author(s):  
Xiao Kang Yi ◽  
Wen Fu Wu ◽  
He Lei Cui ◽  
Jun Xing Li
Keyword(s):  
Numerical Simulation ◽  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Simulation Analysis ◽  
Internal Heat ◽  
Simulation Software ◽  
Drying Process ◽  
Finite Volume Discretization ◽  
Transfer Equations ◽  
Labview Program

A finite volume discretization method for solving the heat and mass transfer equations of drying jujubes was developed in this paper. Combined with the Labview program, development of a numerical simulation software for internal heat and mass transfer during drying of jujubes, and simulation of the drying process on the jujubes using the software. The results showed that the simulation results and experimental data were consistent.

Study on Fire Smoke Movement of Urban Traffic Link Tunnel

2014 ◽  
Vol 580-583 ◽  
pp. 1037-1041 ◽  
Author(s):  
Xiao Lin Yao ◽  
Zhi Gang Zhang
Keyword(s):  
Numerical Simulation ◽  
Theoretical Analysis ◽  
Simulation Software ◽  
Urban Traffic ◽  
Control Measures ◽  
Smoke Control ◽  
Smoke Movement ◽  
Exhaust Port ◽  
Fire Smoke ◽  
Fire Scenarios

Fire simulation software (FDS) was employed to simulate the fire smoke movement of urban traffic link tunnel (UTLT) under the semi-transverse ventilation. Numerical simulation and theoretical analysis were used to analyze the fire smoke movement in three fire scenarios. The analytical results show that: semi-transverse ventilation can effectively control the spread of fire smoke. When the exhaust air rate is certain, the exhaust port interval of 20 m and 50 m has little effect on function of smoke control. The research results provide references for the design of smoke control measures in UTLT.

3D Numerical Simulation Analysis and Pre-Estimation New Technology of Ground Collapse Caused by Subway Shield Construction

2013 ◽  
Vol 405-408 ◽  
pp. 1239-1246
Author(s):  
Yuan Liang Liu
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
New Technology ◽  
Technical Problem ◽  
Ground Surface ◽  
Simulation Software ◽  
Surface Settlement ◽  
3D Numerical Simulation ◽  
Ground Collapse ◽  
Ground Surface Settlement

The prediction of ground collapse caused by subway shield construction has been an important technical problem in urban subway shield construction, if the ground collapse could be pre-estimated, it could be able to take appropriate precautionary measures in advance to avoid the occurrence of ground surface settlement before the project construction, but it’s difficult to predict and calculate the settlement accurately. This paper analyzed main causes of ground collapse caused by shield construction, summarized the influence of several important parameters to surface settlement and then Midas GTS 3D numerical simulation software was used to simulate shield construction process and calculate ground surface settlement, to calculate stress, strain and displacement of overlying strata above the shield driving machine, obtained calculated values of surface settlement to predict ground collapse. Practice has proved that this pre-estimation new technology is in accordance with fact, it provides a useful reference for subway shield construction project.

The Numerical Simulation Analysis on Safety Stability in Underground Space of Urban Track Transportation System

2011 ◽  
Vol 90-93 ◽  
pp. 1812-1818
Author(s):  
Hong Ye Chen ◽  
Jing Fei Zhang ◽  
Hui Zhong Ma ◽  
Jin Ying Ma
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Transportation System ◽  
Simulation Software ◽  
Safety Measures ◽  
Engineering Construction ◽  
Whole Process ◽  
Risk Characteristics ◽  
Key Points ◽  
Engineering Projects

In order to study and demonstrate the safety condition of urban track transportation system in mechanics area, and to determine the key points and difficulties of this system, it uses FLAC3D numerical simulation software, combines the applied examples of engineering projects, carries on simulation analysis on aspects of surrounding soil’s deformation rule during construction stages, the mechanics analysis during main structure’s construction, and the system surrounding soil’s stress-strain rules during operation stages, etc.. Feasible safety measures and suggestions were proposed accordingly. The applied research indicates that the numerical simulation analysis can express the risk characteristics and rules well during engineering construction and after construction, and further avoid potential hazards or accidents’ occurrence, which has important meanings for ensuring the safety of engineering projects during the whole process.

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