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Modeling and verification Simulation process.Research based on GT-power and Fluent co-simulation to analyze uniformity of EGR gas distribution.
The simulation flow as following in figure 2.
(3) Co-simulation of 1-D simulation software GT-power and 3-D CFD software Fluent could obtain engine perfoemance parameters and intake flow related parameters precisely,it provided a reference for engine emission control teconology research.
[2] Ramanathan, Subramanian ; Hudson, Anthony; Styron, Joshua; Baldwin, Brian; Ives, David; Ducu, Dan.EGR and swirl distribution analysis using coupled 1D-3D CFD simulation for a turbocharged heavy duty diesel engine.SAE Technical Papers, 2011
Structural analyses for the vehicle exhaust system based on CFD simulation[J].

CFD Research Methods CFD is a computational fluid dynamics for short, with the development of computer technology, all the issues involved fluid flow, heat exchange, molecular transport and other phenomena, can now be solved by means of CFD [2].
Three-dimensional digital modeling The CFD model study starting in the induced draft fan outlet and ends at GGH entrance.
Meshing and boundary conditions The grid is geometric forms of expression CFD models also support simulation and analysis.
Mesh quality has an important impact on the CFD computational accuracy and efficiency [5].
For complex CFD problems, mesh generation is extremely time-consuming and error-prone, time mesh generation is often greater than the time required for CFD calculations.

Keywords: Vertical-Axis Water Turbine, hydrokinetic technology, CFD, NACA 0025.
In this paper, two-dimensional, time-accurate, parallel CFD simulations of the flow field around a small Darrieus-type VAWaterT operating in an open flow-field are presented, as a part of a research work involving both the University of Padua (Italy) and Vortex Energy S.r.l.
An unstructured mesh was chosen for the Wind Tunnel sub-grid, in order to reduce engineering time to prepare the CFD simulations.
Temporal Discretization and Convergence Criteria The commercial CFD package adopted for the proposed numerical simulations was ANSYS FLUENT 12.1 ®, that implements 2-D Reynolds-averaged Navier-Stokes equations using a finite volume-finite element based solver.
An improved temporal-discretization simulation did not show any significant variation.

The Optimization Design of the Planing Vessel’s Channel Parameters Based on the CFD Technology Hai-long SHEN1, a, Wei Lu2, b and Yu-min SU3, c 1,2,3 National Key Laboratory of Science and Technology on Autonomous Underwater Vehicle, Harbin Engineering University, Harbin 150001, China ashenhailong@hrbeu.edu.cn, bluwei@hrbeu.edu.cn, csuyumin@hrbeu.edu.cn Keywords: catamaran planning vessel;channel parameters;hydrodynamic performance;CFD Abstract:Due to the special hull shape of the catamaran planing vessel, the shiplines optimization design and the hydrodynamic performance prediction of the catamaran planing vessel are mainly carried out by model tank tests and the empirical formula at present.
In this paper, the influence of the key channel design parameters on the catamaran planing vessel hydrodynamic performance is studied based on the CFD technology.
In recent years, with the rapid development of computer calculation ability, some mature CFD methods began to play an important role in the ship hydrodynamic performance prediction, which became a kind of auxiliary means at the hydrodynamic performance test research [1, 2, 3, 4].In this paper, channel parameters’ influence on the resistance performance of the catamaran planing vessel is discussed based on the CFD technology.
Fig. 7 Resistance curves of different Fig. 11 Resistance curves of different channel relative widths channel relative heights Fig. 15 Resistance curves of different channel top deadrise angles Summary Restrictions in simulation and data probing,expenses and scale effects of experimental analysis are good reasons to employ a numerical tool as a part of ship design procedure.In this paper, the single degree of freedom movement method based on the dynamic grid technology is adopted to analyze the influence of channel parameters on the catamaran planing vessel hydrodynamic performance, which includes the channel relative width /B, the channel relative height and the channel top deadrise angle.
The numerical results show that suitable channel parameters could be getting by the numerical simulation within the suggestion scope of channel parameters.

Analysis of Heat Island Intensity in Urban Blocks Using Coupled Simulation Jing Liu1, a, Fei Ma1,b and Fan Li1,c 1School of Mechanical Engineering, University of Science & Technology Beijing, China a Jingliu1998@yahoo.com.cn, b yeke@ustb.edu.cn, c jeckr@126.com Keywords: Heat Island, Urban Blocks, CFD, Urban Canopy Model Abstract.
In this paper, a building canopy model is coupled with CFD for the analysis of microclimates within urban blocks under different urban and architectural planning.
The simulation results show that heat released from the air conditioning systems is one of the most important factors affecting outdoor thermal environment.
In order to estimate the likely effects of such modifications it is necessary to develop effective simulation methods for urban thermal environment.
CFD Model.

Introduction CFD analysis is widely used to determine lift and drag coefficients of airfoils.
However, modelling drag coefficients through CFD analysis has remained a key challenge over the years.
Results from the CFD analysis has also been compared with experimental and XFOIL [5] results.
Cokljat, “A Three-Equation Eddy-Viscosity Model for Reynolds-Averaged Navier–Stokes Simulations of Transitional Flow,” Journal of Fluids Engineering, vol. 130. p. 121401, 2008
Fürst, “Numerical simulation of transitional flows with laminar kinetic energy,” in Engineering MECHANICS, 2012, vol. 20, no. 5, pp. 309–315

The flow-force on poppet valve in the case of the converging flow is simulated and studied by CFD.
Simulation results represent that the traditional formula for computing the flow-force can be used only in the certain range, so the formula is modified based on the simulation result.
Geometry of Poppet Valve Through the CFD flow simulation result, the relationship of the valve port structure and flow pattern is studied from a flow field microscopic perspective.
Fig6 is the simulation result of the flow-force for the different pressure difference and the different opening position.
Figure 7 is simulation result and value computed by the modified formula of the flow-force.

Currently, one dimensional simulation (1D), three dimensional simulation (3D) and hybrid simulation are commonly used in CFD simulation of the intake and exhaust systems.
Hybrid simulation means coupling of one and three dimensional simulation.
In this paper, CFD technology was used to optimize exhaust runner of GW15 gasoline engine.
Finally, verified simulation results though experiment. 1D Simulation 1D Modeling.
(3) In the design of exhaust runner, the performances of engine could be predicted precisely using CFD technology.

In this paper, the passing ability of the detector in the vertical segment of a pipe was studied using CFD simulations.
In this paper, CFD (Computational Fluid Dynamics) methode is used to calculate the force to the detector by the pipeflow.
Numerical model and simulation results Problem statement.
Simulation results and analysis.
Polidori, Turbulence Model Choice for the Calculation of Drag Forces When Using the CFD Method, Journal of Biomechanics. 43 (2010) 405-11 [7] B.

CFD Simulation of a Supercritical Carbon Dioxide Radial-Inflow Turbine, Comparing the Results of Using Real Gas Equation of Estate and Real Gas Property File Mostafa Odabaee1, a *, Emilie Sauret1,b and Kamel Hooman3,c 1School of Mechanical and Mining Engineering, The University of Queensland, Brisbane, Queensland, 4072, Australia 2Queensland University of Technology, 2 George Street, Brisbane, QLD, 4000, Australia am.odabaee@uq.edu.au, bemilie.sauret@qut.edu.au, ck.hooman@uq.edu.au Keywords: CO2 Brayton cycle, CFD, simulation, real gas, radial-inflow turbine, equation of estate, supercritical CO2 Abstract.
The present study explores CFD analysis of a supercritical carbon dioxide (SCO2) radial-inflow turbine generating 100kW from a concentrated solar resource of 560ºC with a pressure ratio of 2.2.
It is interesting to note that using RGP table with 100x100 size takes merely 28 seconds more to complete the simulation compared to timing of PREoS method.
The turbine performance comparison between the meanline analysis and 3D CFD is an interesting field of research and out of scope of this study; it will be investigated in another paper.
[11] Louda, P., et al., Numerical simulation of turbine cascade flow with blade-fluid heat exchange.