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The research of the flow simulation in the inner stirring tank with the single pipe and dual pipe was studied by CFD, which has demonstrated the fluid simulation effect of the single pipe and dual pipe.
Basing on this result, the flow simulation effect of dual pipe is better than the single one, and the result has a certain practical significance effect on industry.
With the computational fluid dynamics (CFD) is developing rapidly, the numerical analysis method has became one of the important methods of research in chemical equipment industry.
The numerical simulation Simulation process uses control volume method, and use Rhie - Chow algorithm to avoid shaking.
Through the simulation we can see that the given initial conditions are suitable for gas-liquid mixing characteristics, and the convergence residual < 10-4.

Results and discussion Simulations of microfluid driving and stasis were performed using CFD-ACE + software.
The implementation of CFD-ACE + includes a few processing steps.
Next, CFD-ACE-SOLVER is to iteratively solve the equations.
Simulation results can be dealt with CFD-VIEW for graphing and observing fluid dynamics.
Simulation of microfluid stasis.

With the development of computational fluid dynamics (CFD), the simulation of complex flow problems is possible, it just overcomes the weaknesses of the first two methods.
Discrete approximation method, calculated parameters of the observation or testing, researchers’ experience and skills of programming and data use are the three main reasons of CFD errors[1-4].
So choosing the right model and calculation method to simulate the flow of centrifugal pumps for improving the applicability of CFD, continuous improvement of centrifugal pump performance has a very good engineering sense.
And common simulation methods are steady multi-phase and unsteady.
The literatures of steady on the multi-phase simulation and compare with two simulations are rare currently.

Lattice Boltzmann Method (LBM), which is based on the mesoscopic models, is a new CFD approach, and it has the congenital superiority and the inestimable development potential in the simulation of complex fluid flow.
The simulation results are consistent with the NASA experiment data.
Lattice Boltzmann Method (LBM) is a new kind of numerical simulation method.
Xu puts forward an optimal low-dispersion low-dissipation LBM schemes for computational aeroacoustics, and shows that LBM is superior to the other CFD methods[4].
In this paper, the simulation is carried out at the low Mach number (Ma=50/340=0.147).

Optimal Design of Heating and Ventilation for Drying Room Based on Transient CFD Simulation Si Huang 1, a, Tiantian Ding 1, a, Chao Yan 2, b, Zisheng Wang 2,b 1School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, China 510640 2Containerization Research Institute, CIMC, Shenzhen, China 518068 ahuangsi@scut.edu.cn, a897750930@qq.com, bchao.man@cimc.com, bzisheng.wang@cimc.com Keywords: Drying room; temperature field; mean age of air; energy-saving Abstract.
By means of simulation, it is possible to significantly shorten the drying time of the container corners, and to achieve the purpose of energy saving. 1.
The finite volume method, widely used in CFD, is adopted in this simulation.
Considering heating process is time-dependent, a transient simulation is performed in this work with 0.1s time step.

A Computational Fluid Dynamics (CFD) modeling software (ANSYS Fluent) was applied for this purpose, which is an important and widely used tool for predicting complex flows [28-30].
Ineichen, Sidewall Effects in Flow Over a Backward Facing Step: Experiments and Numerical Simulations, Phys.
Nagano, Investigation of Turbulent Boundary Layer Over Forward-Facing Step via Direct Numerical Simulation, Int.
Wang, Direct Numerical Simulation of Turbulent Flow Through a Ribbed Square Duct, J.
Reeve, Numerical Simulation of Overflow at Vertical Weirs Using a Hybrid Level Set/VOF Method, Adv.

Introduction A main task in Wind Engineering is the simulation of FSI analysis.
They are well suited for data fitting in any multidisciplinary simulation and widely used in different field such as geology, topography, iatrology [10,11].
(a) CSD Mesh: Nnod=861, Nelem=1600 (b) CFD MESH: Nnod=1271, Nelem =2400 Fig.1 CSD and CFD mesh on FSI boundary Based on Eq.13 the analytical solution of displacement on CSD and CFD mesh on FSI boundary can be calculated and the displacement contours are drawn in Fig.2.
(a) CSD Mesh (b) CFD MESH Fig.2 Displacement contours on CSD and CFD mesh of analysis solution The displacement numerical solution of CFD mesh can be calculated based on the displacement analytical solution of CSD mesh using CRBF-FSI method.
(a)ri /lmax=1 (b)ri /lmax=1.5 (c)ri /lmax=2 (d) (ri /lmax=4) (e) (ri /lmax=6) (f) (ri /lmax=8) Fig.3 Displacement contours of fluid mesh for different compactly supported radius The relevant coefficient between the displacement results of analysis solution and numerical solution on CFD mesh and also the solution time for different compactly supported radius are listed in Tab.1.

Experiment confirmation of CFD study To confirm the result of the CFD method, an evaporative cooling system is established and some experiments are conducted in the laboratory.
The result of the experiment shows that the distribution of static pressure in the inlet-box to the air cooling condenser are in well accordance with the ones from the CFD method.
With the help of the CFD software, simulations of the flow field of coolant gas in the inlet box to the air cooling condenser are carried out.
Cui, Numerical simulation and experiment for the close-loop-self-circulating evaporative cooling system of hydrogenerator stators, Master Thesis of IEECAS, 1999
Tian, Numerical simulation for circulating systems and experimental comparison of the closed-loop, self-circulating evaporative cooling of hydro-generators, Electrical Engineering, pp.127-134, 2004 [6] G.B.

Numerical simulation method is used to predict the curve in diagnosis model.
FEM method and CFD method is used to determined the curve in the modeling.
It indicates that their obvious simulation error under linear elastic model.
Fig. 5 shows simulation and experimental result of load-displacement curve.
Numerical simulation method is used to predict the curve in diagnosis model.

Numerical simulation of flow around power transmission multi-bundled conductors has been carried out.
We start with a description of a weak formulation of incompressible Navier-Stokes Equations. 2.2 CFD solution method In this paper, a two-dimensional six parallel transmission lines of 30-mm-diameter as is shown in Fig.1 is selected for numerical modeling.
CFD grid distribution around the transmission lines For the transmission line in the environment of the surrounding air flows, The Reynolds number around the lines is greater than the critical threshold.
An economical approach to model flow, model was adopted for the simulation calculation in the Fluent [9].
This suggests that the distance between lines will reduce greatly in the strong wind. 3.The result shows that the CFD model is able to accurately predict the both velocity and drag force of the long crossing transmission line.