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A New Skeletal Chemical Kinetic Mechanism of Ethanol Combustion for HCCI Engine Simulation Dai Qian, Guan Hua-ye School of Energy and Safety Engineering, Tianjin Institute of Urban Construction, Tianjin, China daiqian1238@163.com, ghyxyz@sina.com Keywords: Ethanol, Skeletal model, Numerical simulation, HCCI Abstract.
The versatility of the detailed mechanism is better, but it include so many reactions, so it is too large to be adopted by a 3-D CFD simulation model.
The simulation environment was set as 0-D, homogenous, constant volume and adiabatic.
In order to check the skeletal model in the HCCI engine condition, so single-zone HCCI engine model was used in the simulation.
The simulation results show that simplified model and detailed model have good consistency.

Software CFD is capable of flow visualisation which is then used as the base for the ventilation efficiency assessment.
The simulation can detect places of possible accumulation of condensate – see Fig. 2.
Based on numerical simulation displayed using velocity contours (in accordance with the legend in [m/s]) it is evident that two whirls are formed in the floor; the wind stops flowing in their centres v = 0 [m/s] (dark blue ovals – see the legend).
Often the only alternative is to carry out a CFD (computational fluid dynamics) method, for example using ANSYS computational programme.

In order to ascertain the design direction and shorten research cycle, in addition to the rapid development of computer technology, it is convenient to use CFD technology to simulate the defrosting process.
In order to simplify the compute process, the simulation was divided into two parts, the one was the steady simulation of air flow field and the other was the transient analysis of the defrosting process.
Analysis and Simulation of Defrosting.
Experimental Measurement and Numerical Simulation on Defrost Performance of Bus Windshield in Chinese[J].
System Simulation Technology, 2011,07(3):190-195 [6] GENG Tie, LI Dequn, ZHOU Huamin, SHAO Yujie, WANG Weijun.  

Two dimensional CFD analysis of micro patterned surfaces in hydrodynamic lubrication.
Debaets, Experimental study and numerical simulation of the large-scale testing of polymeric composite journal bearings: twodimensional modeling and validation, Tribol.
CFD model for turbocharger journal bearing performances.
CFD simulation of magnetorheological fluid journal bearings.
Simulation Modelling Practice and Theory 19 (2011) 1035–1060

The accuracy of numerical simulations of heat transfer in supercritical fluid may depend on turbulence models.
Previous CFD study [3] using the Fluent code revealed the RNG turbulence model gives reasonable results in predicting heat transfer of supercritical water, therefore the RNG turbulence model was used in this study. u is the velocityvector, while is velocity component in special direction .
Numerical computations were carried out using the popular CFD package Fluent 6.3.26 [5].
Fig. 4 Variation trends of surface HTCs with the inlet LNG mass flow rate Conclusions Three-dimensional computational fluid dynamics (CFD) based modeling and simulation have been conducted to investigate the influence of inlet mass flow rate on heat transfer of supercritical LNG in horizontal tubes.
Bao, Numerical modeling and simulation of condensation heat transfer of a flue gas in a bundle of transport membrane tubes, International Journal of Heat and Mass Transfer. 60 (2013) 41-50

Simulation Analysis on Interior Flow Field of Recoil Brake Based on Dynamic Mesh Yezun Sun1,a, Junqi Qin1, Changchun Di1, Kaibo Cui1, Yan Wang2 1Mechanical Engineering College, Shijiazhuang, China 2Unit 66064 of PLA, Fanzhi 034306, China ayzsun_2012@163.com Keywords: CFD; recoil brake; dynamic mesh; numerical simulation Abstract.
Simulation of the flow field of recoil brake accurately was achieved.
Pressure, speed and other data were got by simulation.
Numerical Simulation of Flow Field in A Gun Recoil Mechanism[J].
Numerical simulation of flow field in gun recoil brake based on dynamic mesh[J].

The corresponding regularities are obtained from simulation results, which provide a method for design optimization of mufflers.
Geometric models of mufflers are built with Pro/E software in this paper, then velocity field, pressure field and vector field are numerical simulated by mains of CFD.
�umerical Simulation Mesh Generation.
Velocity field and pressure field are obtained using CFD method to analyze the airflow influences on muffler performances.
Transactions of Csice", Vol. 21,2003, p.337-340 [3] MA Da-you, "Fundamental Theory of Modern Acoustics", Science Press, 2004 [4] HAN Zhan-zhong, WANG Jing and LAN Xiao-ping, "Example and Appliance of Fluid Engineering Simulation with Fluent", Beijing Institute of Technology Press, 2004

Numerical simulation of the thermal NOx emission under three different loads in the furnace of a supercharged boiler is conducted with FLUENT software.
The supercharged boiler is studied in this paper by CFD methods.
Geometric model of numerical simulation The geometric model of numerical simulation is shown in Fig.1.
As the geometric model of numerical simulation is complex, we split the volume into several ones and then mesh one by one.
[6] ZHAO Jian xing, Numerical Simulation of Combustion, Science Press, Beijing, 2002.

We will seek the answer using a computerised fire simulation.
Computer Simulation of the Fire Computer simulation of a fire means: (i) simulation of the progressive ignition of combustible objects located within the fire compartment and the release of heat and gaseous products during their combustion; and (ii) simulation of the transport of released heat and smoke across the compartment and the rest of the building.
The basis for the latter analyses (i.e. the analysis of the transport of heat and gases) are transport equations, also better known as numerical models of fluid dynamics (CFD models - "Computational Fluid Dynamics") and thermal radiation.
That model was prepared in FDS [2] which was further used for fire-related CFD and heat radiation analyses.
Fig. 2 Simple scheme of the models engaged in an advanced fire simulation.

Then the large eddy simulation of gas-second order moment of solid model (LES-SOM model) is established for the simulation of dense gas-solid flows.
(4) (5) (6) Computed results and anlysis The simulations are carried out with the CFD code M-FIX which previously is used to model the flow in fluidized beds.
There is a reasonable agreement between the experiment and the simulation results. .
The numerical simulations predicted the core-annular flow structure in the riser.
Large eddy simulation of a pulverized coal jet flame ignited by a preheated gas flow[J].