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On the Use of CFD in Thermal Analysis of Industrial Hollow Ceramic Brick M.
CFD is one of the most appropriate tools to raise the knowledge about the fluid flow, as well as the temperature and moisture fields in the drying systems, as shown by Khan and Straatman [4], that demonstrated the ability to propose a formulation for precise numerical simulation of a convective drying process in porous materials.
Both geometry and mesh were constructed using ICEM CFD 15.0 software.
The simulations were performed using commercial software ANSYS CFX 15.0.
The following simulation times and time step were adopted

Department of Environmental Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China Key words: CFD; street canyon; particle dispersion; numerical simulation Abstract.
A two-dimensional computational fluid dynamics (CFD) model for evaluating the airflow and particles dispersion within a street canyon was built up, which was based on the incompressible Reynolds Averaged Navier-Stokes equations, turbulence model and the particles transportation equation.
The square grids (each mesh cell is 0.5m x 0.5m) are used in the simulation.
Numerical simulation result for case1 (a) Air velocity distribution (b) Particle concentration distribution Fig.5.
Numerical simulation result for case7 From Fig.4(a) it can be seen that two vortices are generated.

The simulation results show that there are two low pressure regions and two regions of high volume fraction of steam in angle nozzle.
Numerical simulation is a new method of research on flow field, which develop with the improvement of computer technology[8].
Take a kind of typical cavitating nozzle, namely angle nozzle as research object, the flow field inside nozzle were simulated on the basis of advanced CFD software¾¾fluent.
The mixture model, RNG model and cavitation model were used in simulation.
Governing Equations of Cavitation Model In CFD software fluent 6.3 used in this paper, the cavitation model is Singhal complete cavitation model.

Only the reasonable gas flow ensures the uniform temperature field.The paper uses the technique of computational fluid dynamics (CFD) to conduct the numerical simulation of the flow field and finds out the law of the distribution of the temperature field,on the basis of which the numerical simulation of non steady state of the freezing process of the frozen products is carried out.The experiments prove that the simulation results can better reflect the reality,and show that CFD tools can play an important role in the design and optimization of cold storages.
Because the process of freezing is a process in which the temperature changes over time, you need to set the unsteady method of research method of unsteady.Therefore, its computation is more complex, the simplified grid model iterates more than 3000 steps.[6] Fig 8 Division of the grid of frozen goods Fig 9 The final temperature field distribution 2.3 Numerical simulation computation After the physical materials of frozen goods are set,by the simulation computation,the distribution of the final temperature field is obtained,which is shown in Figure 9.The figure clearly shows that the temperature in the center of the frozen goods is the highest,and the effect of freezing lasts longes. 2.4 the analysis simulation results Based on successfully simulating the flow field in cold storages,the goods model is created.The freezing process of numerical value is calculated.The results show that the temperature of goods at the beginning falls rapidly because of the
JAKUBOWSKI:CFD Simulations as a Supporting Tool for Process and Construction optimization in Food Industry Production Practice: A Case Study of a Single Truck Smoking Chamber[J].Italian Journal of Food Science, Vol. 11(2013),P.251 [3] Foster A M, Barrett R, James S J: Measurement and prediction of air movement through doorways in refrigerated rooms [J] .
The numerical simulation and validation of the gas flow field in cold storages [J].
Journal of agricultural engineering, Vol. 2(2005)P. 11 [5] Xie Jing, Wu Tian The numerical simulation of the temperature field of small cold storages in the process of opening and closing doors [J].

Firstly, we parameterized a surface model of the original model and took the parametric model into a CFD simulation.
The k-ε turbulence model is chose in CFD simulation.
Table 2 shows the tolerance comparison of the CD value between CFD simulation and wind tunnel experiment.
The tolerance, less than 1%, between CFD simulation and Approximate Model prediction shows that the Approximate Model's precision is enough high.
The CD1 and CD2 stand for the aerodynamic drag coefficient of Approximate Model and CFD simulation, respectively.

Meanwhile simulation of the temperature field was made with CFD software, the result fits temperature requirement.
And try to clarify its feasibility and energy conservation respectively with CFD software and Energy-Plus.
Simulation Research.
As the large amount of simulation, we take the simulation of five subway coaches in garage as an illustration to verify the validity of the simulation.
The same simulations were conducted while there were different numbers of coaches in garage.

Furthermore, Izadi MJ[11] carried out CFD simulations for different floor heating models.
A standard model was employed in these simulation .
In this simulation, ˚C，AUST=18˚C.
In this simulation, ˚C;˚C.
CFD Simulation of Temperature Distribution in a Room with Various Under Floor Heating System Models.PROCEEDINGS OF THE ASME FLUIDS ENGINEERING DIVISION SUMMER CONFERENCE,2009(1):2319-2329

This paper adopts the method combining wind tunnel test and numerical simulation, using CFD software to establish the representative building model of round monolayer Earth Building and get the wind load characteristics in different wind direction.
Therefore numerical simulation result is credible, and it is feasible to take CFD simulation technology used in the study of Hakka Earth Building wind load characteristics.
Computer simulation of wind environmental conditions around buildings [J].
Civil Engineering CFD Simulation of Parameters Settings[C].
Evolution of CFD software from academic code to practical engineering software[J].Journal of Wind Engineering and Industrial Aerodynamics,1999,81

Numerical Study of Fluid Behavior Induced by Anchor Impeller in a Stirred Vessel AMINE Benmoussaa*, LAKHDAR Rahmanib and MEBROUK Rebhic ENERGARID Laboratory, University of Bechar, BP417, Bechar 08000, ALGERIA *abenmoussa.a@hotmail.fr, brahmani_l1@yahoo.fr, cmerebhi@yahoo.fr Keywords: Agitated vessel, Anchor impeller, Laminar flow, yield stress, Finite Volume Method, CFD.
In the present paper, we have described in-depth numerical study of the basic fluid mechanics problem of yield stress fluid flow with regularization model of Berovier and Engelman in a cylindrical vessel not chicaned equipped with an anchor stirrer by using computational fluid dynamics (CFD) based on the finite volumes method discretization of Navier - Stokes equations formulated in variables (U.V.P).
Nowadays, computer simulation of mixing flow (CFD) in the vessel is widely used to optimize the stirrer geometries and to get a better insight into the complex flow patterns produced by the interaction between the impeller, the tank internals, and the vessel wall [2].The capability of CFD tools to forecast the mixing behavior in terms of mixing times, power consumption, flow pattern and velocity profiles is considered as a successful achievement of these methods and acceptable results have been obtained [4].
Stirred system Fluid model To study the yield stress fluids which constitute the purpose of this paper, mixing systems are dealt with by numerical simulation.
In the regions where the material behaves like a rigid solid, and in the regions where the material flow with an apparent viscosity [5]: (5) The major difficulty with the constitutive equation (1) and (2) when used for numerical simulation is the discontinuity associated with infinite value of the viscosity whenapproaches τ0.

The model for the analysis of the gear pump work designed for the hydraulic systems was made for the 3D non-stationary two-phase flow using CFD software.
Due to the questionable measurements of these phenomena there was chosen the method CFD (Computational Fluid Dynamics) for the simulation calculation of the pressure wave produced when opening of the gear space in the discharge port and cavitation arising during the pump work [1-3].
The used turbulence models in simulation calculations of cavitation are shown in Table 1.
Moczala, Intermittent CFD simulation of interlocked hydraulic pumps - industrial use, basic conditions and prospect, In: Simulation im mechanischen Umfeld, FLUIDON Konferenz 2009, November 10 - 11, Aachen, Germany, 2009
Suresh, TWO-DIMENSIONAL CFD ANALYSIS OF A HYDRAULIC GEAR PUMP, In: AC 2007-821: American Society for Engineering Education, 2007