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The establishment of simulation model.
Model building is the basis of the numerical simulation which can be realized by using Gambit of Fluent.
The built simulation calculation model in the design is shown in Fig. 4 (a).
Inlet (a) Simulation calculation model (b) Simulation calculation model grid figure Fig.4 Simulation model figure of flow divider Settings of boundary conditions and the solving method.
Simulation results and analysis The 9 experiments in Table 1 were all simulated and analyzed by using CFD.

Gu c 1 College of Mechanical and Power Engineering, Nanjing University of Technology, 211816 Nanjing, China a jy0321scl@163.com, b zhoujianfeng_ren@163.com, c bqgu@njut.edu.cn Keywords: Centrifugal pump, Unsteady flow, Vibration, Numerical simulation Abstract.
The methods of numerical simulation were discussed.
Yuan Shouqi et al. adopted CFD and Lighthill sound analogy theory to solve the acoustic field of volute in centrifugal pumps.
This model is not sufficient to provide a precise boundary layer simulation, but it gives satisfactory distribution of the pressure and velocity in the pump.

FLUENT simulation result gave good agreement with Darcy-Weisbach formula.
The experiment conducted by Legono, et al. was slightly greater than the simulation results.
FLUENT simulation result gave good agreement with Darcy-Weisbach formula.
Flow simulation in this study was carried out by assuming a steady flow.
[9] Fluent Inc, Fluent Theory Guide, CFD Software Package Fluent Ver. 6.3, Fluent Inc, Lebanon, 2005

The exhaust pipe is meshed by CFD pre-processing software GAMBIT.
The exhaust mechanism of power supercharger is studied with afore-mentioned method, the inlet velocity of pressure pipe is set 500m/s, 600m/s, 700m/s, 800m/s, 900m/s, 1000m/s respectively, the outlet pressure is set the hydrostatic pressure at 4.5m, 4m, 3.5m, 3m, 2m, 1m water depth respectively, other simulation parameters are the same as above mentioned.
In order to design Y-pipe structure, applying the experimental optimization technology, the relationship between the structure parameters and the exhaust performance of the pipe is studied with the same simulation model and parameters set as above

Considering steady-state conditions, fluid flow velocity in the axial direction very larger than the fluid velocity in the transverse direction through of porous medium and very smaller than the sonic velocity (viscous dissipation and substantive derivative of pressure terms negligible) [9,10], and without heat generation, Eq. 1 can be written in elliptical cylindrical coordinates in a three-dimensional form, as follows: (2) According to Fig. 1, the boundary conditions used in the simulation are given by: (3) at the surface (4) (5) where is the focal distance.
Several simulations considering the constant porosity (ε = 0.2, ε = 0.4, ε = 0.6 and ε = 0.8), variable porosity in cross-section of fixed bed reactor (Eq. 7) and constant mean porosity in the bed calculated by integrating Eq. 7 over the volume of the reactor, were done.
Ross: Second International Conference On CFD in the Minerals and Process Industries (CSIRO), Melbourne, Australia, (1999), p. 273

planar line type causing negative pressure on the edge of the inner diameter, therefore, the distribution of the cavitation corrosion on the thrust bearing which applies this type of planar line is more extensive than that of others; the relative area of the pressure peak on the spiral groove thrust bearing formed by the arc line is the biggest (the absolute value of the peak is relatively lower), followed by the spiral groove thrust bearings formed by the spiral line and parabola line .In the junction between the slot and the dam along the circumferential direction, the variation of water film pressure gradient of the spiral groove formed by the spiral line is small, which feature will help enhance the stability of thrust bearing. 3.3 Results and Compares of Loading Capacity Fig. 2 Comparison of the loading capacity of Fig.3 Comparison of the loading capacity of spiral groove bearings with rotate speed change spiral groove bearings from experiment and numerical simulation
[5] Cheng Li, Liu Chao, Zhou Jiren, et al.Numerical Simulation on Geometrical Parameters for Open Pump Sump[J].Transactions of the Chinese Society for Agricultural Machinery, 2009, 40(1):50～55
[6] Shi Weidong, Li Qifeng, Lu Weigang, et al.Estimation and Experiment of Axial Thrust in Centrifugal Pump Based on CFD[J].Transactions of the Chinese Society for Agricultural Machinery, 2009, 40(1):60～63

The solidification data obtained from casting trials were subsequently used in performing inverse heat transfer analysis to enable computer simulation of the casting process in computer software (MAGMASOFT® ).
Results Mold filling characteristics were investigated in CFD software and verified with visual inspection of castings.
Gaddam with MAGMASOFT® simulations is greatly appreciated.

Measuring cycle of the engine For example, in Fig. 6, Fig. 7 and Fig. 8 three load simulation diagrams recorded on chassis dynamometer are presented.
Subbarao, Commercial Vehicles Muffler Volume Optimization using CFD Simulation, SAE Technical Paper 2014-01-2440, 2014, doi:10.4271/2014-01-2440

By computer simulation techniques and some test methods, pedestrian wind speed around the buildings and air flow velocity could be determined.
In the design, by environmental CFD simulation and field trips, the location of the open space could be determined in order to avoid the formation of high speed wind.

Introduction The development of Lab-on-a-Chip-systems relies on the extensive use of computational fluid dynamics (CFD).
This study focus on a simple design and fabrication of microfluidic using capillary effect to support fluid flow across reacting assays with limited sample availability is proposed and the analysis was done using COMSOL 3.5 Multiphysics simulation to create minimum possible gap between microchamber and Lab on chip sensing elements.
Schönfeld CμFD Computational Micro Fluid Dynamics Basic Principles and Simulation, proceedings of the COMSOL Users Conference 2006 Frankfurt