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Gas-solid flow behavior of the bottom zone of a 65t/h High-low bed CFB was simulated using the commercial computational fluid dynamics (CFD) software package Fluent.
Nowadays, with the enhancement of computer performance, CFD models have enjoyed great development.
Yu qing feng [4], Wang qinggong [5] study the gas-solid two phase flow of High-low circulating fluidized bed via numerical simulation with EEM model. 2D CFD simulation of gas-solid flow profile of the bottom zone of the High-low bed CFB is performed using EEM incorporating the kinetic theory of granular flow in this study.
Simulation Settings The 2D geometry of the dense zone is shown in Fig. 1.
In addition, a constant time step of 5e-4 s was used, and the simulation was performed for 5s of real fluidization time.

Determination of the Diameter of a Cylinder to Insertion in a Low-speed Wind Tunnel based on EFD and CFD VASCONCELLOS, Guilherme L.F. de1, a, QUEIROZ, Matheus D. de1,2, b, LEDO, Luiz F.
The approaches used were the experimental fluid dynamics (EFD) by the use of Pitot tube and hot wire anemometer (HWA) and the computational fluid dynamics (CFD) simulations, performed with ANSYS CFX software.
They should be tested through experiments or approximated by the CFD techniques, like in flow around circular cylinders case.
CFD techniques are not able to replace the experimental tests, since they require experimental validation, usually made in wind tunnels [8].
Velocity profile validation EFD x CFD As can be seen, the numerical results were validated showing better agreement with the hot wire anemometry technique.

In order to investigate natural cross-ventilation in buildings driven by combined wind and thermal buoyancy forces, computational fluid dynamics (CFD) with the DES model is applied.
This paper applies the CFD method to study cross-ventilation driven by wind and buoyancy forces.
Simulation Setup Building Models.
Numerical simulations were performed by the CFD code FLUENTTM 6.3.
Conclusions To study cross-ventilation driven by combined wind and buoyancy forces, CFD simulations with the DES model were applied in this paper.

Internal flow study In this paper, a three dimensional numerical simulation of the complete unsteady flow on the whole impeller-volute configuration was carried out using the CFD code ANSYS CFX.
The CFD simulation process began with a steady flow calculation using the frozen-rotor approach.
Spectrum of pressure fluctuation (20Hz-2KHz) Vibroacoustic simulation A FEA casing model was constructed in ANSYS.
An interpolation algorithm was used to project the CFD pressure onto the FEA casing model.
This approach splits the aeroacoustic simulation problem in two steps: (1) Solve the turbulent flow with the CFD methods. (2)Based on the flow information provided by the CFD codes, define equivalent sources and take into account the noise radiation with computational acoustics method.

The CFD method is developed to investigate the effect of cavity geometry on aerodynamic performance of hypersonic vehicle with a forward-facing cavity on the nose-tip.
The CFD results are compared with the experimental results and there is a good agreement between them.
The grid of simulation model on the symmetry plane and on the wall of the nose-tip is shown in Fig.2 and Fig.3 (validating example 2).
A big agreement is shown between simulation and experiment results in these figures.
Some errors come from the assumption of simulation model, counting error and experimental measurement.

The study was carried out using Computational Fluid Dynamics (CFD) for various sideslip angles (b) and various flaps deflection angle (dT).
The simulation was conducted at 0.1 Mach number (~35 m/s) and results in terms of coefficient such yawing and rolling moment are tabulated in order to determine the stability of the aircraft.
This paper presents about yaw stability of UiTM’s BWB aircraft that was analyzed using CFD simulation.
lU lD Y Fig. 2: Relation between side force, drag force, yawing moment and moment arm CFD Simulation Yaw stability investigation was done using Computational Fluid Dynamics (CFD) simulation approach.
This model was imported into CFD software to run the simulations.

Student *Corresponding author: LI Jian-ping, Male, Professor Keywords: CFD, Twisted-tape, Flow field, Heat transfer, Parameters optimization Abstract.
The model of heat transfer tube was established to obtain the distribution of velocity field, temperature field and pressure field with the aid of the computational fluid dynamics (CFD).
Simulation Results.
Table 1 shows how the physical properties of the fluid are designated in the simulation.
Conclusion In this paper, CFD has been adopted to simulate velocity field, temperature field and pressure field in the pipe with and without twisted-tape inserted.

The simulation result showed that this method can satisfy the requirement of precision and provide reference for the analysis of the flow field which had the established relationship between structural parameters and laminar flow within it.
CFD software based on Finite Element Analysis is commonly used to analyze such flow field.
CFD geometry with multi-plate, simplified CFD geometry and their meshing graphs The setup in ANSYS® FLUENT® is as following: laminar model, density is 998.2kg/m3, viscosity is 0.001003kg/m –s, velocity magnitude of inlet is 0.000381m/s.
The results of simulation showed that the range of errors was small enough between two solutions, and it can meet the requirements of practical application.
This simplified method provided alternate means for some CFD research field that could be analyzed indirectly.

Numerical Simulation of the Flow of Inflatable Cover Based on FLUENT Jianhua Wang1,a, Changzhi Xiao 1,2,b, Jinghui Wang 2,c, Ligang Cai 1, Lishui Cui2 and Tiejun Wang2 1Beijing University of Technology, No.100, Pingleyuan, Chaoyang District, Beijing, P.R.China 2National Institute of Metrology P.R.China, No.18, Bei San Huan Dong Lu, Chaoyang District, Beijing, P.R.China awjh@bjut.edu.cn, bxiaocz@nim.ac.cn, cwangjh@nim.ac.cn Keywords: blackbody radiation source, inflatable cover, CFD simulative, FLUENT Abstract.
This paper presents a new way for performing numerical simulation for the three-dimensional inner flow field analysis of new inflatable cover and blackbody radiation source cavity by using the FLUENT software of CFD.
The experimental test results were consistent with the simulation results to verify the accuracy of the simulation.
Summary This paper performed numerical simulation for the flow field of inflatable cover and blackbody radiation source cavity by using FLUENT software of CFD to acquire the characteristics of pressure, velocity and temperature of the cavity which then had a detailed analysis and description, and then with the acetone tracer particles experiments verified the accuracy of the analytical results that revealed how the outside air entered into the cavity to cause the frost, dew and mist, these can shorten the development cycle of new inflatable cover.
Fujun: Computational Fluid Dynamics Analysis-Principle and Application of CFD Software (Tsinghua University Press, Beijing 2004)

According to the simulation results from CFD, the node loads at the interface of pump wheel and the working fluid were obtained and the torque and axial force were predicated.
The pressure and velocity fields in a coupling can be obtained from a CFD simulation.
A further study was made by Yongquan Wang etc. in Ref.11, where the deformation model of wheel was exported to CFD again and the simulation result showed that the deformation of which has small influence on flow field .
CFD analysis.
Contours of results simulation.