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In this paper the internal flow patterns of a sludge pump with three different recessed centrifugal impellers were analyzed based on CFD by using the turbulence model to close the time-averaged Navier-Stokes equations.
In this paper the three-dimensional internal flow fields of sludge pumps with recessed centrifugal impeller, a kind of no-clogging pump, were numerically simulated by means of computational fluid dynamics and famous commercial CFD software Fluent.
Since the model test of sludge with real mud or sludge will be very difficult and expensive, so that the fluid to be used in simulation is clean water at 200C in initial design stage.
Fig.3 Meshes of computed domain 4 Analyses of Internal Flow Patterns and Comparison of Energy Performance 4.1 Analyses of Internal Flow Patterns Based on the numerical simulation results and data on computed nodes, flow fields and pressure distribution can be drawn.

Simulation results for TKE show accurate profiles.
Simulation results for horizontal heated channel flows obtained with FLUENT are presented.
Numerical results are validated by direct numerical simulation “DNS” data for Reτ = 150.
Simulation Procedures Test case.
CFD, accepted (2010)

To solve this problem, many researchers choose to establish the measurement turbine model by CFD methods.
Different from the traditional static simulation method, this paper directly uses the method of dynamic simulation, through UDF programming and sliding mesh structure, a dynamic simulation model of the turbine.
The Establishment of Simulation Model Problem Statement.
Fig.1 Turbine measurement devices Simulation Model.
Simulation results show that the simulation model can reflect the variation in characteristics of the turbine caused by the position and cavitation.

China apwc@heut.edu.cn, bjxlyg@heut.edu.cn, chanju3721@163.com Keywords: Bulk cement tanker, Fluidized, Simulation, FLUENT Abstract.
The fluidization models of the fluidized bed were created in the CFD (Computational Fluid Dynamics) software FLUENT, which were then used for simulation for an improved fluidization process, and finally the fluidization quality was analyzed.
Simulation of this program in FLUENT indicates that the type of board can eliminate the dead band of splitter board effectively.
Compared to 42°of the original design of the quality of fluidization, choose 40°and 44°cases in simulation.
Simulation result shows in Fig. 2, Fig. 3 and Fig. 4.

CFD Simulation of the Hydrodynamics of Core-Annular Flow of Oil, Gas and Water in Elliptic-Cylindrical Duct J.L.
Figure 3 represents the mesh used during the simulation.
Table 1 - Fluid properties used in the simulation.
Dynamic simulation of the morion of capsules in pipelines.
Applying CFD in the Analysis of Heavy-Oil Transportation in Curved Pipes Using Core-Flow Technique.

Numerical Study of Flow Separation and Pressure Drop for Flow past Staggered Tube Bundles Azmahani Sadikin1,a and Norasikin Mat Isa1,b 1Centre for Energy and Industrial Environement Studies (CEIES), Faculty of Mechanical Engineering and Manufacturing, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, Malaysia aazmah@uthm.edu.my, bsikin@uthm.edu.my Keywords: Flow separation, pressure drop, heat exchanger, staggered bundle, CFD Abstract.
The simulations were undertaken to inform on how the fluid flowed within the tube passages.
So, in the simulations, only a symmetrical half of a flow passage between the tubes is used.
The simulation was run until the residual of the pressure and velocities were less than 0.00001.
These values are chosen to best fit to the data, supported by the single-phase CFD simulations presented in this paper.

Computational Fluid Dynamics (CFD) is one of the methods that can be used to study the nature of turbulent flow especially in the aspect of wind engineering besides the experiment at full scale of reduced scale (wind tunnel experiment).
Large Eddy Simulation (LES) is a promising way for the simulation of wind flow fields and pollutant dispersion [6], though it is still restricted by the capability of today’s computers.
The simulation was run for 30 min of simulation time without pollutant source in order to establish the turbulent wind fields throughout the domain and all statistics are averaged at least for 15 min.
These factors contribute to the quality of the resultant simulation.
Best practice guideline for the cfd simulation of flows in the urban environment. (2007)

The fire simulation method in each fire modelling software is selected based on the software capabilities.
The more precise mathematical fire models include primarily the computational fluid dynamics (CFD) simulations and zone fire models [10, 12, 13, 25].
These window openings are considered permanently open throughout the simulation.
Comparison of CFAST and FDS for Fire Simulation with the HDR T51 and T52 Tests.
Comparison Studies of Zone and CFD Fire Simulations.

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.