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Numerical Simulation 0f Natural Ventilation in Typical Residential Layout Jing Li1, a 1Zhejiang Industry Polytechnic College, Shaoxing, China 312000 asx98lijing@sina.com Keywords: natural ventilation; CFD; rate of flow Abstract.
Based on the CFD numerical simulation method of three-dimensional RNG k~ε turbulence model, using the fluent software to simulate the indoor natural ventilation of typical house , this paper studies the factors affect the indoor natural ventilation and the measures for enhancing the efficiency of ventilation.
CFD is established on the base of the crowd flow control equation.
The simulation working condition and the result analysis The simulation working condition.
The simulation working conditions are shown in Table 1.

The technique integrates CFD and 3-D reservoir simulation concepts to define and quantify the effects of different operating conditions on discretised reservoir blocks.
The study was carried out using a modelled computational grid block generated by the CFD solver.
The CFD simulation results comparison of instantaneous velocities between liquid phase and solid phase is one of the key features which makes the investigation more realistic compared to experimental studies which can not measure individual solid particles speeds separately in a multiphase of oil, water, gas and fines while all continuously flow together.
Such simulation results as shown in Fig. 3, were further analyzed.
A unique technique that integrates CFD and 3-D reservoir simulation concepts to define and quantify the effects of fines migration in a multiphase environment has been initiated for the first time.

Simulation of Erosion Wear in Slurry Pipe Line Using CFD Vikas Kannojiya1,a*, Satish Kumar2,b, Mani Kanwar3 and S.K.
The model was then verified with the results obtained by experiments and CFD simulations.
Conclusion The simulation investigation is carried out to evaluate the erosion wear characteristics in the pipeline using CFD code ANSYS-CFX.
Numerical Simulation on Typical Parts Erosion, Thermal science, 17, 1349–1353
A combined CFD / Experimental methodology for erosion prediction, Wear, 1–8

Among these methods, CFD numerical simulation can reduce the cost of the whole experiment and provide feasibility analysis, which has a guiding role for experimental research and theoretical analysis.
Current CFD software mainly are Phoenics [10], TEACH, FLOW 3D [11] and FLUENT, etc.
Fluent was designed based on the idea of CFD.
Under the same condition, we got the numerical simulation result of the single air outlet with strip blades, and then we used CFD post software to calculate the average value according to the simulation of wind speed of various parts.
After importing the numerical simulation results into CFD post software, we got the internal flow field distribution.

So, the method of numerical simulation has become more and more popular[4,5].
Fig.1 Geometry of the baseline and ejector nozzles Simulation of CFD The simulation of CFD is the basis of the IR computation and is calculated with FLUENT.
This method is based on the connectivity information of the CFD mesh.
The numerical simulation model of infrared radiation characteristics for the aeroengine exhaust system has been built and a code is developed with RMCM combining with the CFD calculation.
Backward monte carlo method simulation in radiative heat transfer.

Also, the experimental results show that the radial and centerline pressure profiles through various coaxial jets has good correlation with the CFD simulation.
A CFD model was developed and compared with the experiments.
At NPR 2.5 for x/D closer to exit plane the pressure is over-predicted by the CFD.
Ø A CFD simulation using ‘k-e’ two equation turbulence model was performed to predict the mixing characteristics of the supersonic jets.
It confirms that the simulation results have a good agreement with experimental measurements.

The effects of the particle size on the erosion of the plugged tee are studied by computational fluid dynamics (CFD).
Mathematical models of the flow of the compressed air with the entrained cutting particles through the plugged tee are built and imported into the CFD through embedding procedures.
Prepare for CFD Simulation The geometric model of the CFD simulation is the internal flow field of the plugged tee, as is shown in Fig. 1.
After boundary conditions and the parameter of the particle size are given, the simulation results are obtained.
According the simulation results, the residence time of the particles in the inlet section is obtained (Table 1).

Numerical simulation on aerodynamic characteristics of road vehicles on bridges under cross winds Y.
(a) The cross section of the Yichang Suspension Bridge (b) The vehicle model Fig. 1 Model geometry and overall dimensions (Unit: cm) Numerical simulation The present analysis is performed using a commercial CFD solver ANSYS CFX12.
Simulation method.
Simulations are calculated with a constant wind speed of 20 m/s.
A summary of the simulation conditions for each case is shown in Table 1.

CFD Design and Analysis on Circular Slotted Fin Surfaces of Two-row Tubes Heat Exchangers Jingzhao ZHANGa Key Laboratory of Western Mine Exploitation and Hazard Prevention Ministry of Education, School of Energy Engineering, Xi'an University of Science and Technology, Xi'an 710054, China azhangjz98@126.com Keywords: CFD, numerical simulation, slotted fin surfaces, Nusselt number Abstract.
The major purpose of the present study is to design an efficient circular slotted fin surface for use in gas intercoolers through CFD software.
CFD Model Physical Models.
The physical parameters of the air, fin and tube in the numerical simulation are presented in Table 2.
Results of the numerical simulation Comparison results of Nusselt number under identical pressure drop are shown in Fig.4 (b).

With these questions in mind, firstly, aimed at solid particles depositing, the flow field of the slurry under the conditions of no agitation, was investigated in this work by computer fluid dynamics (CFD) simulation, which may be useful to the energy saving design of gibbsite precipitation tank.
Fig. 1 Configures of mechanical agitated precipitation tank: (a) is the real tank; (b) is a simplified sketch; (c) is the physical model for CFD simulation The physics 3D model was built according to the real mechanical agitated tank as shown in Fig.1 (c).
The steady state simulation using the commercially available CFD software of Fluent was carried out in this study.
Zhang, Experimental investigation and CFD simulation of liquid–solid–solid dispersion in a stirred reactor, Chemical Engineering Science (2010) 5559-5572
Joshi, CFD simulations of gas–liquid–solid stirred reactor: Prediction of critical impeller speed for solid suspension, Chemical Engineering Science 62 ( 2007) 7184-7195