Search results

It is needed to simplify the simulation model.
Analysis on Fluid Field Simulation of Multi-gear Pump[J].
A novel CFD-Axial motion coupled model for the axial balance of lateral bushings in external gear machines[J].
Simulation Modelling Practice and Theory. 2012(26): 60-76
CFD Investigation of Gear Pump Mixing Using Deforming/Agglomerating Mesh[J]. 2007, 129(4): 476-484

The effect of boundary conditions on simulation of horizontally homogeneous atmospheric boundary layer X.L.
In the simulations of horizontally homogeneous ABL, some useful guidelines for appropriate boundary conditions have been provided.
The governing equations are solved using commercially available CFD code, Fluent, with the segregated method.
As explained by Richards and Norris [1], the spike occurring near the ground results from the numerical discrete scheme used in CFD code.
Schlunzen et al: Best practice guideline for the CFD simulation of flows in the urban environment.

Optimization on the Structure of Ceramic Nozzles by FLUENT Simulation Mingwei Ding1, a, Changjing Fu1,b and Sibei Yin1,c 1Shandong Labor Vocational and Technical College, Jinan,Shandong,250022,China ad_mw305@163.com, bfuchangjing@ sdlvtc.cn, cyinsibei@ sdlvtc.cn Keywords: Nozzle ; Fluid simulation; Gas-solid two-phase flow Abstract.
The simulation results have a good agreement with the experimental results.
It carried out the flow field analysis of blast nozzles of different structures, with the thought of CFD and computer simulation, it can analyze the dynamic and static performances of grain conveniently and efficiently [1].
CFD geometric modeling and meshing Consider the complex shape of the computational domain, when using the GAMBIT to divide gridding, we adopt unstructured grid.
This result is consistent with the simulation analysis.

The effect of the independent geometrical parameters on the performance of diesel engine has been studied by using CFD code AVL FIRE.
The discipline how the engine performance is influenced by the independent parameters is studied by using CFD code AVL FIRE 2008.
These series of combustion chambers are simulated by using 3D CFD code AVL FIRE 2008.
(a) Comparison of mean cylinder pressure between simulation and experiment, (b) rate of heat release on ω type and double swirl combustion chamber Figure 9.
[2] Shahrokh, Hajireza, “Application of CFD Modeling in Combustion Bowl Assessment of Diesel Engines Using DoE Methodology”, SAE paper 2006-01-3330

The pressure drop and averaged heat transfer coefficient of seven rows with five tubes in each row with integral wake splitter has been determined by means of 2-D simulation using commercial computational fluid dynamics (CFD) code Fluent.
Simulations have been carried out at Reynolds number based on tube diameter from 5000 up to 27800.
The comparison between CFD and Experimental results can provide that both of cases have taken same behaviour carve.
Susan , Numerical simulation of fluid field and heat transfer of streamlined cylinder in cross flow, U.S.A. 2005.

The influence of the tower, hub and nacelle are neglected which is a fair approximation for the upwind simulation.
The CFD model contains 3,650,000 nodes and the runs are conducted by Ansys-CFX 11.
A relatively good agreement between the CFD results and the test results can be observed.
Drag coefficient values Having extracted the induction factors from the CFD results, we calculate of the local AOA at different radial positions.
To achieve more accurate results, using more advanced CFD techniques with higher number of nodes can improve the CFD results and hence the calculation of this method will lead to more precise blade parameters.

For friction disc with complex grooves and solving domain, some computational fluid dynamics (CFD) software is usually used.
Building simulation model Thickness of driving friction disc is 6 mm, inner and outer diameter are 0.15 m and 0.223m, and film thickness is 0.2 mm.
However, if overall friction disc is taken as simulation object, there is a big amount of calculation.
Fig.3 The boundary conditions Simulation and result analysis (1) The rotational speed of driving friction disc is 1500r/min and the slave disc is stationary.
Vols. 468-471, (2012), p591-595 [4] Fujun Wang: Principle and Application of CFD Software(in Chinese), Tsinghua University Press, (2004).

In this paper we evaluate the evolution of 3D-CAD based development processes based on geometry generation, conceptual design and simulations tools.
Kinematic simulation requires knowledge about position, contact surfaces and the type of connection used while FE simulations require the precise connection of each component and external conditions [10].
The current strategies include the integration of standalone simulation software in packages of software which include CAE and CFD.
Fig. 5 CAD model of a front wing race car (Inclination angle of 115° of the main wing) The CFD simulations was done on a basis of a epsilon standard wall function turbulence model combining various meshing strategies to determine the effect of the grid on the convergence of iterative calculations [13].
CFD usage allows the precise simulation of various condition of speed by producing flow fields and surface data that are difficult to obtain from real experiments.

For the numerical solution it was used the Computational Fluid Dynamic (CFD) commercial code FLUENT®, based on the Finite Volume Method (FVM).
The computational domain (OWC coupled to a wave tank) was created and discretized in GAMBIT® software, while the numerical simulations were carried out by means a computational modeling implemented in the Computational Fluid Dynamic (CFD) commercial software FLUENT®, which is based on the Finite Volume Method (FVM) [7,8].
In the simulations of this study, two different phases are considered: air and water.
All numerical simulations were carried out in a computer AMD Athlon 2 Core with 3.0Gb of RAM.
To reduce the simulation time the parallel processing technique was adopted [6].

The simulation analysis turns out that the pump chamber pressure increases sharply in the later of sucking process because of the flow inertia, which is the root cause of sucking process outflow.
It’s measured With laser micrometer measuring the outflow will be distinct, when the open height of outlet check valve is more than 0.0015mm.[8] Simulation Of Sucking Process Outflow Simulation is to receive the pressure changing condition during sucking process outflow, in order to decide whether open the output valve to form outflow, so when modeling, the output condition can be ignored, and the deformation of the piezoelectric vibrator can be used as the translational motion.
In this way, the grid model can be simplified greatly, and the simulation result will not be influenced too much, the simplified fluid-structure interaction model is shown in Fig.4.
Fig.5 is the CFD grid model.
Refer to the simulation of the sucking process of the piezoelectric pump, the chamber pressure is not always minus during, outflow in sucking process is completely possible.