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Based on the case, this paper introduced a CFD method to heat the diesel fuel to reduce fuel viscosity and surface tension, expecting to explore the in-cylinder combustion process and emissions generation, so that the atomization effect of fuel spray and combustion in diesel could be improved.
Use CFD to elaborate the effects on emission and combustion process by using high temperature fuel.
Simulation of the combustion process begins from 120°CA before top dead centre to 120° CA after TDC.
Optimization of a simplified sub-model for NO emission prediction by CFD in large 4-stroke marine diesel engines [J].
[4] Yan Ping, Feng Mingzhi,Ping Tao,et al.Simulation research on effect of nozzle parameters on combustion and emissions for HPCR marine diesel engine[J].

To reduce the cavitation occurring on valve plate of typical Swashplate piston pump, an optimization design method was introduced to quantitively analyse the accurate relationship between structural jet grooves parameters and cavitation.Using the CFD method, the sunking and discharging process in piston pump was simulated dynamically.The damp groove’s structure effect on both jet angle and pressure shock were analysed visually with a series of different parametrical grooves.By establishing parametrical damp groove model, the piston pumps’ dynamic analysis was integrated with the technologies of CFD analysis, experimental design and approximation model, etc.The mathematical model of plunger pressure in oil back period, jet angle and structural parameters of damp groove were established in the form of second-order RSM model.
Tab.1 Parameters of Valve plate high pressure chamber damping trough model Guide hole diameter Guide hole depth Damped hole diameter Damped hole depth d1 h1 d2 h2 2.2 Result analysis of piston pump CFD dynamic resolution From Fig.3 and Fig.4, it can be easily seen that the diameter and depth of both guide hole and damp hole have a great effect on jet angle.
) (2) Then 20 sets of data are used to revise the RSM model, the model’s accuracy is checked with correlation coefficient R2.The R2=0.987 indicates that RSM model is basically consistent with simulation model and the amount of calculation in optimized design could be reduced by setting the RSM model as the objective function.
References [1] Dheeraj Saxena.CFD Modeling of Cavitation in Axial Piston Pump[D].West Lafayette: Purdue University

Therefore, in this work, a double inlet cyclone separator was designed for natural gas dehydration, and the numerical simulations of the gas-particle flow are presented by the commercial CFD software FLUENT 6.3.
Cyclone dimension used in this simulation are as shown in Fig.1.
In the numerical simulation, the above discussed Reynolds stress model (RSM) is used for the turbulent flow.
In the simulation, the steady solver is performed using the 10-3 convergence criterion accuracy for the calculation.
Kanani: CFD analysis of flow field in square cyclones, Powder Technol (2009), p. 349-357.

Design Builder, Energy Plus Simulation; 1.1.1.4.
Ansys CFD; 1.1.2.2.
Star-CD CFD; 1.1.2.4.
AutoCAD Simulation; 1.1.2.5.
Solidworks CFD; 1.1.2.6.

This paper first adopted POLYFLOW numerical simulation.
POLYFLOW is based on the finite element method of computer fluid dynamics (CFD) software, is used in the viscoelastic material flow simulation, can solve the isothermal/nonisothermal, 2d/3d, steady-state/unsteady flow problem encountered in processing polymer, rubber, food, and glass, is used for the polymer extrusion, blowing, brushing, mixing, coating process of laminar flow, heat transfer and chemical reaction process [2].
POLYFLOW was first used in rubber injection molding simulation analysis in the paper.
Five groups of rubber simulation examples were designed in this paper.
Finite element model For the simulation of filling process, a finite element model must be established.

Improving the efficiency of a hydro-turbine system by vortex generators Huachen Pan1, a, Shuli Hong2, b 1Hangzhou Dianzi University, Xiasha, Hangzhou 310018, China ahuanchen_pan@yahoo.com, bhong_0815@163.com Keywords: Vortex generator, Hydro turbine, Draft tube, CFD Abstract.
First, the performance of the hydro-turbine system was analyzed with a CFD solver under different working conditions.
D., et al. utilized CFD simulations coupled with optimization algorithms to get a shape optimization technique to redesign an existing draft tube[2].
Parameters of Turbine Performances To utilize CFD for hydropower application, a typical way is to ignore the static pressure caused by gravity force to minimize the possible truncation error caused by large pressure gradient.

Till the end of the 20th century, with the development of computer technology, CFD did not play a greater role..
Accordingly, the simulation with compressible N-S equation is required to be used to bypass the propeller's flow field.
Propeller's numerical simulation was conducted in this rotating coordinate where the rotating speed of the rotating fluid was 2575rpm.
Unsteady CFD Simulations of Propeller Installation Effects.AIAA 2006-4969
Trameland Jennie Barber.Modeling Propeller Flow-Fields Using CFD.

Operation Process Calculation Model and Test Many CFD softwares can be used to do research on combustion and emission simulation at present.
The simulation and test data is 321ppm and 353ppm respectively.
The NOx emission simulation result is relatively accurate.
Through conversion, the simulation and test data of Soot emission is 0.48FSN and 0.45FSN respectively, indicating that the simulation can be acceptable.
CFD in ICE Engine Spray and Combustion Simulation: Current Status and Future Development[C].

In this paper, the simulation analysis has been done using the software FLUENT on the basis of theoretical analysis of the sensor, and the optimization design of the flow sensor structure has been given according to the analysis results, the results show that the flow characteristics of the sensor has been improved. 1.
Currently, two ways to obtain the flow field of the flow sensors, namely direct measurement, and software testing numerical simulation.
However, the computational fluid dynamics (CFD) is a primary tool to analyse the built-in flow sensor’s flow field, and to understand the interaction working rules between fluid and structural components of the sensor and to optimize the parameters of the sensor’s structure[1][2][3].
In this paper, the simulation analysis has been done using the software FLUENT on the basis of theoretical analysis of the sensor, and the optimization design of the flow sensor structure has been given according to the analysis results, the results show that the flow characteristics of the sensor has been improved.
CFD design analysis and struture improvement The flow field simulation of the flow sensor has been done using the CFD software FLUENT, the settings of the initial parameters of the simulation as follows: the mass flow rate entrance is 0.1 kg/s, the pressure exportation is 823200Pa, and the angular velocity of the impeller is 49.6rad/s according to the project demands. 3.1 Simulation analysis and improvement of the impeller Fig. 3 Mesh generation of the geometric body model Flow region geometric body model has been established in order to simulate the internal flow fieldof the flow sensor, and then the mesh generation of the geometric body model has been done using the commercial software GAMBIT, just as shown in Fig.3.

Three-dimensional model and computational fluid dynamical (CFD) model for flow filed analysis are established.
Fig.1 Structure of ordinary-gear-train based screen pipe Computational Fluid Dynamics (CFD) of the Screen Pipe Structural Parameters of Screen Pipe.
Fig. 2 Geometric model Fig. 3 Mesh of the blades Fig. 4 Mesh of the screen pipe CFD Analysis.
CFD analysis is based on the conservation of mass, momentum and energy.
The simulation of the flow field discloses the mechanism of the dynamical-filtering screen pipe. 2.