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D student, Department of Architecture, National Cheng-Kung University, Tainan, Taiwan an78981133@mail.ncku.edu.tw, blinsiraya@yahoo.com.tw, cjungchou@mail.ncku.edu.tw, dneverending1984@hotmail.com Keywords: Buoyancy-driven ventilation, Cross ventilation, Passive solar chimney, CFD simulation Abstract.
Buoyancy-driven ventilation is designed in the conference hall of MSGT Fig.1 CFD simulation in the conference hall of MSGT A naturally ventilated conference hall in MSGT is used by designed utilizing a passive solar chimney.
Data from the MSGT meteorological station on the outdoor temperature, outdoor wind speed, outdoor wind direction, solar radiation, and relative humidity were used in the CFD simulation (Table 1).
Boundary conditions in terms of thermal comfort simulation CFD simulation results The experimental results and those obtained using the numerical model under the same climatic conditions indicates that the air exchange rate was 5.15 ACH (left side of Fig.2).
This value is very close to the simulated air exchange rate of 5.15 ACH, and within the instrumental error, proving that results of the CFD simulation of conference hall ventilation were accurate.

ANSYS Fluent is used to conduct Computational Fluid Dynamics (CFD) simulation using the Eulerian multiphase model and the standard k-epsilon turbulence model to model and analyze the fluidization in CFB.
Fig. 1 illustrates the CFD methodology used in this research.
CFD Methodology Flowchart.
Simulation Approach Multiphase Modeling.
While CFD simulations provide valuable insights, experimental testing is necessary to verify the accuracy and reliability of the simulated outcomes.

In this study, computational fluid dynamics (CFD) simulation was used to predict the performance of photoelectrocatalytic (PEC) reactors with surface reactions.
Further experimental work is required to validate the CFD simulation to allow better understanding and improvement of the overall efficiency of PEC reactors.
CFD simulations were performed in the three dimensional (3D) domain.
CFD simulations were performed in the 3D domain, where the 3D illustrations of the studied photoreactor geometries are shown in Fig. 1.
Mohseni, CFD simulation of UV photocatalytic reactors for air treatment, Am.

Furthermore, CFD simulation based on Eulerian model with vertical evaporation and condensation was developed, to gain sharp interface treatment between phases.
The Navier-Stokes equations are solved simultaneously in CFD simulation.
Experiments and Simulation Experiments.
CFD simulation.
Then a flow regimes simulation by CFD methods had been experimentally and numerically studied.

Therefore, it is necessary to conduct research on numerical simulation of the three phase mixing inside the stirred tank by means of CFD technology[9-12].
Conclusions This paper combines topological theory with CFD numerical simulation technology and adopts the hydraudynamics model as research means which is commen in industrial simulation to put forward a method that forecasts gas, liquid and solid multiphase mixing uniformity.
Numerical simulation of gas–liquid–solid fluidization systems using a combined CFD-VOF-DPM method: bubble wake behavior.
CFD simulation of hydrodynamics of gas–liquid–solid fluidised bed reactor.
CFD STUDY OF MIXING PROCESS IN STIRRED TANK.

3-D CFD Simulation of the Airflow over a Gable Roof with Different Elevations KRALIK Juraj 1, a * 1Faculty of Architecture, Slovak University of Technology in Bratislava, Namestie slobody 19, 812 45 Bratislava, Slovak Republic akralik@fa.stuba.sk Keywords: CFD, 3-D, airflow, fable roof elevation, turbulent flow, ANSYS Fluent Abstract.
A suitable CFD simulation model can be obtained only if the wind that is approaching over a uniform flat terrain (the wind velocity as well as turbulence quantities distribution) does not change along the computational domain with the same flat terrain.
Results from CFD simulations can be further used for more sophisticated calculations of the effects of wind on buildings and structures, [1,2].
In a CFD simulation, the inlet boundary condition of mean wind speed and turbulence quantities represent the approaching fully developed wind flow.
Kozubkova, CFD simulations of the effect of wind on the spontaneous heating of coal stockpiles, in: Fuel, Vol. 118, 2014, pp. 107-112

In order to enhance the efficiency of compressor, improve flow channel of the compressor and reduce energy loss[2-3], the simulation can be conducted with the method of computational fluid dynamics (CFD).
During the numerical simulation, a solid model of compressor is firstly built and then the simulation excuted[4-5].
In general, the numerical simulation values of the compressor by CFD software NUMECA are accurate and credible.
Conclusion The numerical simulation and optimization design method of turbocharger compressor by using CFD software NUMECA is practical and effective According to the compressor CFD simulation results, it is recommended that the impeller inlet angle of the compressor be 51.40 degrees, and the average impeller thickness be 0.5mm.
Numerical Simulations o f Stall Inside a Centrifugal Compressor [J].

The results of simulation were presented using Commercial CFD program.The CFD simulation can provide detailed distributions of air flow and temperature within data center. [2] applied CFD analysis to show rack inlet temperature and flow distributions for a different height of data center. [3] compared CFD results of two different perforated tile layouts, a traditional and a guard tile arrangements. [4] compared CFD results with measurements of rack inlet temperature using fan boundary conditions at the rear of racks. [5] presented results of a CFD analysis of the combination of overhead airflow distribution and raised floor distribution.
The CFD simulation is used to provide a complete 3-dimensional profile of the temperature and flow within the system.
Results and discussions Validation The results of the CFD simulation in data center were reported.
Correlation for raised floor air conditioning system design The results of the CFD simulation at various conditions in data center were reported.
Conclusion Numerical simulation using the commercially available CFD software Fluent can predict turbulence air flow withinthe data center.

Simulation model 3D model.
Fig.1 The cover and pressure plate Fig.2 CFD model CFD set up.
Open the CFD model, which is already been meshed, in ANSYS CFX [7] module.
From the view of numerical analysis, the problem of clutch CFD simulation is how to deal with the interaction between clutch and the air around it.
CFD simulation analysis of vehicle engine colling fan and aero-acoustic reduction research [D].

CFD Simulation Governing Equations and Drag Coefficient.
CFD Simulation and Results.
The CFD simulation is carried with three different turbulence models and two different boundary conditions.
For 0.8 times of the car length, the simulation results are shown in table 1, where we can find the simulation results varies when the far field is set as No slip wall.
More CFD research job will be done for further study of this problem.