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In recent years, with the extensive use of the fluid mechanical analysis software CFD, some researchers applied the CFD to solve the oil film performances for sliding bearing [5-8].
Simulation of pressure field in hydrostatic bearing with finite element method [J].
Application of CFD analysis for rotating machinery, part 1: hydrodynamic, hydrostatic bearings and squeeze film damper[C].
Research on the dynamic characteristics of hydrodynamic journal Bearing Based on CFD analysis [J].
Numerical simulation of flow in convergent wedge gap[J].

Application of a discrete transfer matrix method in analysis of acoustic attenuation performance of complex perforated pipe mufflers Huo RUI1,2,a, Meng BEI1,2,b and Zhang LEI1,2,c 1School of Mechanical Engineering, Shandong University,Jinan city,China, 250061 2Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Shandong University, Ministry of Education ahuorui@sdu.edu.cn, bSD_xiaobei@163.com, czhanglei53258104@163.com Keywords: perforated pipe muffler, transfer matrix, numerical simulation Abstract.
In Fig. 2, sound pressure transmission loss of a straight-through perforated pipe muffler is calculated by Eq.6 and CFD method respectively.
Fig. 3 Influence of Perforation rate Fig. 2 Comparison of discrete method and CFD Fig. 4 Influence of diameter of expansion chamber Fig. 5 Influence of diameter of perforated pipe Example 2: Composite perforated pipe muffler.
The formulae are verified by comparing one concrete calculation result with that of CFD.

The left figure of each diagram is the Mach contour corresponding to airfoil status by CFD calculation.
Three sets of grid gain fine agreement with experimental data of the shock start point, however, only one experimental data after the shock deviates from the CFD results.
Other experimental data points in good accordance with the simulation.
From the comparison of three sets of computational result and the experimental data, it can be concluded that the computational method is creditable and the CFD tool is appropriate for this kind of flowfield simulation.
The simulation of inlet restart process begins at an unstarted inlet flowfield.

The objective of the article is to bring several numerical simulation models about building fire and smoke movement.
With the development of computer, numerical simulation is widely used in the area of fire protection design.
This kind of model is relatively simplified in the simulation.
Field Model The idea of the dynamics of a fire might be studied numerically dates back to the beginning of the CFD (Computational Fluid Dynamics) and the computer age.
[5] Information on http://www.nist.gov/el/fire_research/cfast.cfm [6] Information on http://www.fire.nist.gov/fds [7] Klote J H: Review of CFD analysis of smoke management systems, ASHRAE Trans, 108 (2002) 687-698.

To make the high efficiency and energy-saving centrifugal pump, using multi-objective optimization design to make hydraulic design of the 500SM35 centrifugal pumps, using CFD technology to simulate the three-dimensional turbulence flow in pump, also make performance experiment and cavitation experiment of the 500SM35 centrifugal pump that have been selfdeveloped.
Make some attempt in the design process of the centrifugal pump impeller, suction chamber and spiral casing: Establishing the multi-objective function model of efficiency, cavitation characteristics and reliability; Determining the appropriate proportion of efficiency, cavitation characteristics and reliability, then make the optimal solution for multi-objective function; Using three-dimensional drawing software to make three-dimensional model of impeller, spiral casing, suction chamber; Using CFD technology to simulate the three-dimensional turbulence flow in pump; Basing the result of numerical simulation and performance experiment of sample pump, to modify the design of pump slightly, make the design more optimal.
Table3 Main parameters of the 500SM35 type centrifugal pump's discharge chamber ⅧQ [m 3/s] v [m/s] ⅧA [m 2] 0.1403 6.36 0.0055 Simulation the three-dimensional turbulence flow in pump Calculation model Basing on unsteady flow to approximated simulate the swirl flow using multiple reference frame model (MRF), solving the area of impeller, suction chamber and spiral casing at the same time, pilling in the standard k-ε turbulence model, make three-dimensional incompressible viscous flow Reynolds-averaged equations and standard k-ε turbulence model closure, and then discrete solution.

ae-mail : guemmadi_samah@yahoo.fr , be-mail : ouibraah@live.fr *Corresponding author : ouibraah@live.fr Key words: Journal bearing, Lubrication, Maxwell model, Viscoelastic fluids, CFD.
Owing to the complexity of the associated hydrodynamic equations, numerical computation is widely used, involving different CFD (Computational Fluid Dynamic) analysis and programs [2, 4, 5, 8, 10, 11], compared to analytical approaches [12].
Boundary Conditions: We use of course the usual well known boundary conditions [1, 4, 5]: a) for the velocity field: (6) h(q) corresponds to a given fluid particle position in the core and is given [1, 4, 5] by : (7) b) for the pressure and the stress field: (8) Numerical Procedure The above equations systems (2) to (5) together with (6) to (8) for given geometric and kinematic characteristics of this 2D flow, are numerically solved using the CFD package Fluent 6.3 completed by UDF.
Papadopoulos, CFD analysis of journal bearing hydrodynamic lubrication by Bingham lubricant, Tribology International, Vol. 41 pp. 1190-1204. (2008)
Clermont, Numerical Simulations of non-Newtonian flow between eccentric cylinders by domain decomposition and stream tube method Journal of Non-Newtonian Fluid Mechanics, 126, pp. 175-158, (2005)

In this paper, we give the detailed CFD analysis of cylinders moving in water according to seismic input, and then present a method suitable for practical usage.
CFD analysis of cylinders moving in water In this section, we simplify the piers as rigid cylinders moving in water, and then calculate the pressures on these cylinders using finite volume method.
For CFD analysis, viscous model is also an important factor which affects the calculating results.
Here we choose the k-epsilon model, the requirement for first wall layer grid size of the model can be determined by an empirical formula: . (2) Our CFD model is a tank filled with 6.5m deep water and air at the rest part, so it is a two-phase flow.
Numerical simulation and analysis A continuous beam bridge with piers in water is modeled into 417 nodes and 415 beam elements, which is shown in Fig4.

CFD model Based on the experimental results operated by Zhang[7], the commercial CFD code Star CCM+ is used to analysis the columnar sodium combustion in a closed burner.
Based on the experimental results listed on the reference 7, the commercial CFD code Star CCM+ is used to analysis the columnar sodium combustion in a closed burner.
But this process was not considerate in simulation.
And the difference existed between the simulation and refference7.
The numerical simulation was carried out absolutely according to test condition.

Simulation of Heat Flux Effect in Straight Heat Pipe as Passive Residual Heat Removal System in Light Water Reactor using RELAP5 Mod 3.2 M.
Straight heat pipe used in the simulation is wickless with 0.1 m of diameter and 6 m of length.
The objective of this simulation is to study the characteristics of straight heat pipe used in the experimental work.
Ferng, "Modeling strategies to compute natural circulation using CFD in a VHTR after a LOFA," in ASME 2012 International Mechanical Engineering Congress and Exposition, 2012, pp. 2341-2351
Alsairafi, "CFD modeling of flow and heat transfer in a thermosyphon," International Communications in Heat and Mass Transfer, vol. 37, pp. 312-318, 2010

Numerical simulation has been conducted to provide guidance of designing the gas supply tube and the nozzles.
From the results of the simulation, the supply gas velocity distribution is very sensitive to the parameters.
In this study, supply gas velocity distribution is discussed for a proposed in-line continuous furnace, through CFD numerical analysis. 2.
Fig 4 The physical model and the mesh in the CFD software 3.
From the results of the simulation, the supply gas velocity distribution is very sensitive to the nozzle diameters.