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Investigation Using Simulations for the Development of Low Cost Catalytic Converter from Non-Precious Metals A.K.M.
Simulations using FLUENT and COMSOL have shown the actual characteristics of the catalytic converter performance.
Hence CFD analysis is used to design efficient catalytic converters.
The simulation result of backpressure in catalytic converter is shown in Fig. 2 and Fig. 3.
Backpressure vs speed from simulation Figure 3.

According to the simulation results, the power unit is optimized.
Structure of the high-speed filling valve Flow Field Simulation.
Before the simulation, some basic parameters should be set according to the actual valve.
The simulation covers the entire flow range.
Based on the simulation of the pressure distribution and the analysis of the impact stress, the valve is optimized.

Effect of the compressible flow characteristics inside a high-speed electromagnetic valve on the operation of the valve is investigated using a numerical simulation.
The numerical simulation solves Navier-Stokes equations and heat transfer equations by coupling, and the compressible flow phenomena inside the valves are studied focusing on the shock structures. .
Most of the studies in the published literatures are 1) on the modeling of the dynamic characteristics of solenoid valves for using control methods[2,3,4], 2)numerical simulations on the pseudo-static and transient performance of the electromagnetic valve using finite elements and other computational methods [5,6].
Summary In the present study, three-dimensional unsteady compressible flow characteristics inside a solenoid on/off switching valve are investigated using a numerical simulation.
Spalding:Computer Methods for Applied Mechanics and Engineering Vol.3(1974), p.269 [9] D.Wilcox:Turbulence Modeling for CFD(DCW Industries, La Canada, CA, USA 1992) [10] R.L.Meakin: Handbook of Grid Generation, CRC Press.

With the advance of reaction science and computer performance, mathematical modeling is working for comprehensive simulation of CO formation to provide a valuable tool to study the insight and understanding of the CO reaction of combustion systems.
With the development of high speed computer and chemical kinetics, it is possible to conduct numerical simulations of flames considering the detailed kinetics schemes.
Fig. 1 Geometry of the fire hole board of burner Table 1 Geometries of fire hole board (mm) H L1 L2 L3 L4 L5 L6 L7 0.5 5 3 6 5 1 1 1 CFD modeling of the combustor The Model Combustors.
The simulation provides the detailed insight of the CO concentration formation and its relation between the maximum flame temperature, flame average temperature and burner exit temperature.

For the solution of this problem the numerical simulations of a thermal condition of implantable part of artificial heart mechatronic unit was carried out and based on results of the solution of a stationary task of heat conductivity.
The carried-out simulation of the established thermal state at various power of thermal losses showed lack of an overheat of a surface of the mechatronic unit housing above critical temperature during the continuous work for a long time and principle possibility of application of the developed design as implantable system.
For the solution of this problem the numerical simulations of a thermal condition of implantable part of artificial heart mechatronic unit was carried out and based on results of the solution of a stationary task of heat conductivity by finite element method.
Results and discussion The simulation results are presented in Figs. 2 - 4.
Zhdanov, CFD research of hydrodynamic parameters of artificial ventricles for pulsating LVAD, Proc. 2nd Technical Congress on Resources, Environment and Engineering (CREE 2015), (2015), pp. 9-14

This book covers these topics: Acoustics and Noise Control, Aerodynamics, Applied Mechanics, Automation, Mechatronics and Robotics, Automobiles, Automotive Engineering, Ballistics, Biomechanics, Biomedical Engineering, CAD/CAM/CIM, CFD, Composite and Smart Materials, Compressible Flows, Computational Mechanics, Computational Techniques, Dynamics and Vibration, Energy Engineering and Management, Engineering Materials, Fatigue and Fracture, Fluid Dynamics, Fluid Mechanics and Machinery, Fracture, Fuels and Combustion, General mechanics, Geomechanics, Health and Safety, Heat and Mass Transfer, HVAC, Instrumentation and Control, Internal Combustion Engines, Machinery and Machine Design, Manufacturing and Production Processes, Marine System Design, Material Engineering, Material Science and Processing, Mechanical Design, Mechanical Power Engineering, Mechatronics, MEMS and Nano Technology Multibody Dynamics, Nanomaterial Engineering, New and Renewable Energy, Noise and
Vibration, Noise Control, Non-destructive Evaluation, Nonlinear Dynamics, Oil and Gas Exploration, Operations Management, PC guided design and manufacture Plasticity Mechanics, Pollution and Environmental Engineering, Precision mechanics, Mechatronics, Production Technology, Quality assurance and environment protection, Resistance and Propulsion, Robotic Automation and Control, Solid Mechanics, Structural Dynamics, System Dynamics and Simulation, Textile and Leather Technology, Transport Phenomena, Tribology, Turbulence and Vibrations.

In hydraulic transient calculation, the surge tank impedance coefficient can be calculated by Gardel formula, model test or CFD[8-10].
As shown in figure 5 and 6, simulation results are in good agreement with the measured curve.
Fig.7 Active power curve of Unit 1 Tunnel and surge tank model considering structure coefficient which approximatively described by piecewise function was used in the simulation, and the simulation results and record curve are shown in figure 7.
We can see that the simulation model has high precision.
This method can improve accuracy of simulation model obviously

Simulation Analysis on Smoke Characteristics of Tunnel Fire with Different Cross Passage Interval Xin Hana, Beihua Congb and Xiaoming Wuc Shanghai Institute of Disaster Prevention and Relief, Tongji University, Shanghai 200092, China Tongji Antai R&D Center of Engineering Disaster Prevention, Shanghai 200032, China ahanxin@tongji.edu.cn, bbhcong@tongji.edu.cn, cWuxm@tongji.edu.cn Keywords: road tunnel fire, cross passage interval, counter-flow smoke, CFD simulation Abstract.
In this paper, the FDS simulation model is constructed according to the mentioned tunnel geometry.
The tunnel length adopted for simulation analysis is 800m long and the ventilation mode is central smoke extraction system.
Table 1: Summary of simulation calculation cases Simulation scenario Case a Case b Case c Case d Cross passage interval L[m] 200 300 400 500 FDS simulation result and analysis Counter-flow smoke characteristics.
T Through the simulation calculation of above four cases, the simulation results display that all the four cross passage intervals could produce definite influence on tunnel smoke characteristics.

The flow field of liquid column scrubber with different inlet structure was respectively simulated by a commercial CFD code, Fluent.
Numerical simulation would be carried out, aiming at obtaining the optimal inlet structure, which is significant to the promotion and application of multi-stage liquid column desulphurization technology.
Numerical Simulations Model Establishment.
The discrete scheme used in this simulation was second-order upwind.
Simulation of SO2 Absorption in a Venturi Scrubber．Chemical Engineering Communications, 2010, 197(7): 934-952

Fig. 1 Extrusion system The newest approach to study the flow and mixing in these extruders was computational fluid dynamics (CFD) numerical simulation.
Numerical Simulation Geometry of Discs.
The number of marker particles had to be large enough for the simulation.
[5] L.Zhu, K.A.Narh, K.S.Hyun, “Valuation of numerical simulation methods in reactive extrusion,” Adv.
[6] A.Li, B.Jiang, S.H.Xu, “3D flow field simulation in series disc-screw extruder,” Polym.