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Flows Field Simulation of Two-phase Swirling Flows Finishing S.Q.
For avoiding blindness of experimental research and improving foresight of practical application, numerical simulation of compulsive swirling flows field on two-phase swirling flows finishing is done through CFD software(Fluent, Gambit), and it illustrates the feasibility of the process and provides credible theoretic basis for thorough research.
Before CFD computing on special problem, calculating area must disperse by messing.
Fig.2 Grid diagram of model Numerical Simulation.
The principle and application of CFD software (TSINGHUA University Press, China 2004) [10] Han, Z.Z., Wang, J. and Lan, X.P.

Research on the airflow characteristics of textile engineering with CFD is widely used and effective [3]-[6].
Simulation Experiments Mesh and Boundary Conditions.
Simulation and Results.
Yu, Numerical Simulation of Air Flow in the Nozzle of an Air-Jet Spinning Machine, J.
Qin, Air Flow in a Pneumatic Splicer by CFD, J.

But it also brings a series of problems in urgent need of further study, such as the CFD analysis of the ECID as well as its impact on the movement of gas mixture.
The quality of grid will directly influence the CFD simulation process and is essential for the transient simulation.
(a) (b) Fig. 3 a) Grid for the static simulation b) Grid for the transient simulation Boundary Conditions.
Static Simulation Results and Analysis Through the static simulation, we can study the flowing features of the ECID.
Sopian: Multi-objective Optimization of Combustion Process in a Compressed Natural Gas Direct Injection Engine using Coupled Code of CFD and Genetic Algorithm (SAE Press, USA 2007)

CFD simulation.
Numerical wind tunnel technology (CFD technology) is a method for simulating changes in the surrounding wind field base on fluid dynamics and solving wind load on the surface of building.
Numerical Simulation Model.
In the crosswind surface corner, like 10, 11, 12 present the numerical simulation results to be small, the measuring point 20, 21, 22 numerical simulation results are big.
(3) Standard model exist a certain error, for improving simulation precision, must be further improved.

Fig.7 Model of exterior environment simulation room 3.2 Working Condition and Boundary Conditions of CFD The running process of exterior environment simulation room in the rated conditions was simulated.
The boundary conditions of CFD was shown in Table 2.
Table.2 Boundary conditions of CFD Name Type Velocity (m3/h) temperature(k) New air inlet Velocity-inlet 1.875 298 Exhaust fan Velocity-inlet -2.98 323 Inlet of model Velocity-inlet 3.125 323 Outlet of model Outflow - - 3.3 Results of CFD In the CFD, the current condition was convergenced when all the absolute criteria was less than 10-5, import and export flow error was less than 10-8.
The results of CFD was same with the theoretical principle.
(2) Through simulation of exterior environment simulation room, the removable exterior environment simulation room can meet requirements of the test

Currently, the way to know the wind load both home and abroad includes field measurement, wind tunnel test simulation and computer analogue simulation.
Based on the existing research findings and by taking assembled steel truss bridge as the research object, the method of computational fluid dynamics (CFD) is used to make numerical simulation for the stochastic wind field.
Governing equation and numerical method Computational Fluid Dynamics (CFD) is the analysis made to the system of physical phenomenon including fluid flow and heat conduction by means of computer numerical calculation and image display.
Based on correlation theory and method of CFD, the workflow of the numerical simulation of the stochastic wind field of assembled steel truss bridge is shown in chart 1.
Analysis of Computational Fluid Dynamics- Calculation Principle and Application of CFD Software [M].

The CFD simulation serves for analysis of the fluid flow around the profile and to evaluate the results for the static and dynamic pressure values.
Then a two-way-FSI, the calculated results are continuously interchanged between the CFD and FEM analysis tools .
For the CFD analysis an incompressible, transient flow simulation was established using FLUENT, which is one of the major CFD solvers integrated in the ANSYS Workbench.
Accordingly, the necessary computing time is large compared to an conventional stationary CFD analysis.
To reduce computation times, the RANS (Reynolds averaged Navier-Stokes equations) k-ε model was used in the CFD simulation.

Y-shaped tee is modeled by three-dimensional graphics software and its flow field is analyzed and numerical simulated by CFD software.
Simulation results are consistent to the practice, which provides important theoretical basis for improving and optimization of Y-shaped tee.
By the using of CFD software, the geometric model of Y-shaped tee is meshed.
With the case studied in this essay, it is thus clear that the method of simulation analyzing of fluid-structure coupling for Y-shaped tee is feasible by using CFD software.
It can be popularized in the other flow field simulation analysis.

CFD analysis model and conditions In fluid dynamics field, some difficult problems by experimental or theoretical methods can be solved by the use of CFD analysis.
Fig. 1 shows the CFD model for working fluid area to be analyzed.
The simulations of fluid flow were done by a finite volume method as a three dimensional, unsteady turbulent flow.
They prove its high accuracy of our built CFD simulation model [8-9].
[8] Wilcox D C, Turbulence Modeling for CFD, 2ed., DCW Industries, La Canada, 2002

Numerical Calculation and Theory of Friction Film The CFD Numerical Theory.
CFD is the integral or partial differential equations was instead by the discrete algebraic.
Simulation of fluid film with Fluent software, can simulate the, relationship between some dynamic characteristics of fluid film and some related parameters.
[2] Houlin Liu, Liang Dong: The progress of mesh generation method in Fluid Mechanics CFD, Fluid Mechanics,2010,38(4).p.32-37 [3] Baoyan Li.
Fluid Mechanical, 38 (2010), p. 23-27 [7] Zhaogao Luan, Khonsari M.M: Numerical Simulations of the Flow Field around the Rings of Mechanical Seals.