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In order to learn the entrainment mechanism of annular flow in OAL pipe, both experiment adopted observational method and numerical simulation used Computational Fluid Dynamic (CFD) were carried out.
The pipe diameter is 4mm and Volume of Fluid (VOF) model was used for two phase flow in simulation.
Alizadehdakhel[3] carried out experiments and CFD simulation in a 2cm diameter and 6m length tube of two-phase flow and pressure drop, both slug-to-annular flow and annular flow were discussed, the simulation results agreed with the results of experiment.
Numerical simulation CFD modeling The CFD software FLUENT 6.3 was used in this paper, and VOF model was employed which was widely used for two-phase free surface problems.
The k-ε (RNG) turbulence was used for turbulent flow simulation.

As we all know, it’s difficult to find the optimal layout under a certain speed in CFD simulation because sufficient time and high-level computing equipment are needed.
Therefore, We took CFD simulation results as sample and trained BP neural network.
CFD Simulation.
In other words, the numerical value of the network and CFD simulations of this group would do a comparison, and then the accuracy and reliability of the network prediction is illustrated.
One day is needed for a group resistance through CFD simulation and more time for a greater Fr.

Application of CFD The numerical simulation of turbine internal flow field is one of the key technologies at present which implements hydraulic design of turbine using the modern design method of hydraulic turbine design, the CFD technology has considered as a main auxiliary mean in design modification[5, 6].
The design process based on CFD combined with CAD for turbine is shown in Figure 1.
The simulation results are statistical calculated; the average values of the runner main parameters inside flow are listed in Table 1.
Through the above numerical simulation analysis we can test hydraulic design and further improve the situation, and make it more efficient in accordance with the design thought.
References [1] Wang Fujun: CFD Software Principle and Application (Tsinghua University press, (2004),in Chinese

By using Computational Fluid Dynamics (CFD) method,numerical simulation of gas flow distribution of ESP transform to baghouse in cement kiln head of 6000 t/d production.
In this paper, By using Computational Fluid Dynamics (CFD) method,numerical simulation of gas flow distribution of the ESP transform to baghouse in cement kiln head of 6000 t/d production, giving the design parameters of air distribution devices through the numerical simulation test, provide the technique basis to the ESP transform to baghouse transformation.
The analysis of air flow organization situation in precipitator can accord to the fluid flow similarity theory to carry on the model test, also can use CFD method to make numerical simulation test.
Numerical Simulation Test The main processes of numerical simulation through applying CFD calculation software to ESP transform to bag filter’s airflow field included the following steps.
Computational Fluid Dynamics-CFD software principles and applications.

Methods: this paper using facade renovation project of Wismar University in Germany as the carrier, it uses Energy-Plus energy simulation software, CFD computational fluid dynamics software and U-wert.net calculation software for U value of material to get the simulation analysis of the energy, physical and regional eco-effect of building green facade.
Construction of Analysis Method Table1 Analysis Method Type Aim Method Model Energy Insulation U-wert.net Wall Node Cooling energy EnergyPlus Building Physical Cooling CFD Office Room Indoor Airflow CFD Office Room Comfort EnergyPlus Office Room Regional Thermal environment CFD Compus Wind Environment CFD Compus Carbon emissions EnergyPlus Building Select the Appropriate Simulation Software.
Fig6 Report of west facade after green Fig7 Monthly heating and cooling energy simulation after green Fig8 Interior CFD analysis for velocity and pressure on 1.5m view Application of Simulation Analysis Simulation Analysis of Energy Eco-effect Insulation Performance.
The wind speed chart, barogram, three-dimensional diagram of two kinds of models can be obtained through the DesignBuilder-CFD simulation(refer with: Fig. 8).
Fig9 Summer design data for comfort (hourly) Fig10 Environment CFD analysis for thermal environment Fig11 Environment CFD analysis for air speed velocity-vectors Comfort.

Numerical simulation studies are carried out for improvement of energy efficiency in a room by with different thermal insulating materials using computational fluid dynamics (CFD).
A multi-physical 3D model room of size 2.6 m × 2.6 m × 2.6 m is created to analyze the performance of different insulating materials using CFD simulations.
The studies are carried out using commercial CFD tool of ANSYS CFX 15.0.
Geometry and Boundary conditions A room of size 2.6 m × 2.6 m × 2.6 m is created to analyze the performance of different insulating materials using CFD simulations with door way of size 2 m height and 1 m width.
TRNSYS, A transient system simulation program, User Guide Version 15.

In this paper, CFD simulations of the wind environment of four typical urban spaces in Shenzhen are introduced.
The process and criteria of wind assessment based on CFD (Computational Fluid Dynamics) simulations using Airpak are shown.
In contrast with wind tunnel, CFD is cheaper and takes less time.
The accuracy of CFD for urban wind assessment is therefore acceptable.
Airpak with Fluent solver is used as simulation tool for the wind assessment.

We indicated the high wind speed areas for discomfort under strong wind conditions experimentally in BLWT wind tunnel and using CFD simulation.
During these tests and also in the CFD simulation, also nearby high-rise building (the main building of VUB bank) was considered.
Fig. 3 Dimensions of the cross-section of the high-rise building [mm] and positions of the pressure taps in the level C (the terrace) CFD Simulation and Obtained Results For CFD simulation, ANSYS 17.2 under Academic license was used [15].
In spite of this fact, we were limited with maximum number of elements 512 000 in CFD simulation (licence limitation).
Schlunzen, B.Carissimo, Best practice guideline for the CFD simulation of flows in the urban environment, COST Office Brussels, 2007

Methods The method used in this study was simulation with ANSYS computational fluid dynamic tool.
Fig. 1 Variations in Stirring Patterns (RUN 1, 2, 3, 4) The CFD simulation process through three stages: preprocessing, solving/solution, postprocessing.
Postprocessing is the final step in the CFD analysis.
At this step, the organizing and interpreting of the data from the CFD simulation results in the form of images and curves are implemented.
Molecular Dynamics Simulation.

Numerical Simulation of The Aerodynamics and Aerothermal Heating for A Hypersonic Vehicle LIU Haiyonga, Qiang Hongfub 201 Section ,Xi’an High-Tech Institute,Xi’an, China ahelian_xicheng@163.com, bQiang@263.net Keywords:Numerical simulation; Waverider; Pre-compressed surface; CFD software; Viscous model Abstract.
Numerical simulation was conducted on the two-dimensional and three-dimensional models of the vehicle using CFD software of Gambit and Fluent.
The results of simulation investigation showed that: High compressed air was constrained beneath the pre-compressed surface of the forebody.
That would be helpful to optimize the design of the hypersonic vehicle, extent the understanding of the CFD software, and improve and modify the turbulence models for suitable utilization in the simulation of hypersonic flow.
The present viscous model was suitable for aerodynamic simulation and needed be modified and improved for aerothermal heating calculation.