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Using CFD method, contrast and analyse the annular identical-cross-section straight pipe and annular hyperbolically curved pipe, the calculation results prove the superiority of the hyperbolically curved pipe.
With the development of boundary layer theory and CFD, it has been able to achieve the computer numerical simulation of a variety of complex turbulent pipe flow velocity distribution.
Computational fluid dynamics simulation software CFD is adopted to create a smooth hole with low Reynolds number, fully turbulent binding simulation model.
∂(ρk)∂t+∂(ρkui)∂xi=∂∂xjμ+μtσk∂k∂xj+Gk-ρε-2μ∂k12∂n2 (1) ∂(ρε)∂t+∂(ρεui)∂xi=∂∂xjμ+μtσε∂ε∂xj+C1εkGkf1-C2ερε2kf2+2μμtρ∂2μ∂n22 (2) μt=Cμfμρk2ε (3) Numerical simulation of the Intakes flow field and results analysis The numerical simulation and flow velocity distribution in the Internal flow field.
[4] Wang Fujun: Computational Fluid Dynamics Analysis—CFD Software Principles and Applications (Tsinghua University Press, Beijing, 2010).

Simulation of the velocity field of gas-solid-liquid three-phase flow inside and outside the abrasive water jet nozzle was studied by the computational fluid dynamics software (CFD).
As the rapid development of computer technology and computed mathematics, a new subject on the flow and flow engineering-CFD becomes mature.
Many experts at domestic and abroad have used the CFD software to solve many problems which can not be solved by theory and experiment method.
The study on the simulation of the field of gas-liquid and solid-liquid two-phase flow inside and outside the abrasive water jet nozzle by using CFD software-Fluent have been carried out[4,5].
The simulation result of Fig.3 is the abrasive track in the nozzle.

Simulations were carried out employing the Ansys CFX commercial software.
To study the characteristics of the filtration process during CFD simulation, the module's geometry was inserted in Cartesian planes, considering the x (transversal length), y (height), and z (longitudinal length) axis.
Implementation of the finite element method for simulation of mass transfer in membrane contactors.
Wilcox, Turbulence modeling for CFD.
Cunha, Treatment of effluents from the oil industry via ceramic membranes - modeling and simulation.

This work objectified to apply Computational Fluid Dynamics (CFD) on Bradley Hydrocyclone and compare the results from this technique to empirical models.
This work objectified to apply Computational Fluid Dynamics (CFD) on Bradley Hydrocyclone and compare the main results to Massarani's methodology [3].
Volume Fraction of Water (298.15 K) in the Bradley Hydrocyclone A value of 46% to underflow-to-throughput ratio was obtained for the CFD simulation while for the Massarani's Methodology the expected value was approximately 49%.
This result shows that this variable can be estimated successfully by CFD techniques.
Reduced Grade Efficiency (G') and Grade Efficiency (G) by Massarani's Methodology and CFD techniques.

Lance flow CFD models are used to determine mass transfer coefficients for typical lance applications.
The results are later used in fast process simulation models.
With CFD (Computational Fluid Dynamics) simulations these parameters can be determined without measurements.
Model Description Simulations are done with ANSYS Fluent software, using finite volume method with compressible flow formulation.
Fabritius: CFD Modeling of a Super-Sonic Top Blown Lance - Development of New Gas Heat and Mass Transfer Correlation.

The aim of the research work described in this paper is to use computational fluid dynamics (CFD) to optimize the geometry of a multi-stage evaporative cooling device to investigate the effects on its performance by varying the primary inlet to mixing st ack area ratio.
The overall purpose of the research work of which the present study is a part, is to use computational fluid dynamics (CFD) to optimize the geometry of a multi-stage evaporative cooling device.
Figure 3- Volume mesh The simulation was carried out as a steady-state analysis.
Results from initial simulation Contour plots showing the temperature and relative humidity on the YZ plane, and at the mixing stack outlet are shown in Figure 4 YZ-plane Mixing stack outlet Figure 4-Temperature and Relative Humidity It can be seen from Figure 4 that a significant reduction in the temperature of the incoming air was achieved in the initial simulation.
Applying the the outlet humidity ratio W4 = 0.0090 kg/kg obtained from the simulation summary, the rate of evaporation was calculated to be 0.085 kg/s.

The aim of this research is to determine the effects of nozzle hole shape on flowcharacteristics of the premix injector by using CFD.
Implosions of cavitation bubbles inside the nozzle holes increase when the turbulence kinetic energy increases and contributes to the further break-up of the spray[8-9].Therefore, the aim of this research is to use CFD simulation to determine the influence of orifice hole shape by analyzing the nozzle flow characteristics of the premix injector.
Boundary conditions for nozzle flow simulation.
This meshing scheme is selected to be used in further simulations.
[9] Tingwen Li, A.G., Sreekanth Pannala, Mehrdad Shahnama, Madhava Syamlal, CFD simulations of circulating fluidized bed risers, part I: Grid study.

Computational fluid dynamics (CFD) that take the place in parataxis with theoretic and experimental research becomes important numerical simulation method to research on fluid flow and is applied to project practice extensively.
Through long-term practical application, it was proved that CFD can obtain satisfactory results to solve single-phase flow in pipeline[5,6].
Finally, simulations have been conducted to fixed duct diameter D=10mm, branch length 4D meshes[8] .
Review of commercial CFD softwar(Journal of Hebei University of Science and Technology, 2005, 26(2):160～165)
CFD Computation of Pressure Loss of Single and Dual-Chamber Resistance Mufflers (China Mechanical Engineering, 2006, 17(24):2567 ～ 2572)

Wind field of terrain liking bell where the river flows from canyon to the open field have been simulated by CFD.
Wind field of terrain liking bell where the river flows from canyon to the open field have been simulated by CFD.
Figure 6 simulation of the terrain by CFD Figure 6 is the CFD simulation of the topography around the observation.
Adding the proper boundary condition, incoming wind profile, the CFD can numerically model the wind circumstance near the bridge.
The CFD technique may be developed to explain some phenomena instead of wind tunnel test on the condition of happened difficulties.

Study of high-pressure waterjet characteristics based on CFD simulation Liping Cao1,a, Shi Liu2,b,Yaosong Huang1,c and Qian Liu and1,d Zhihong Li1,e 1School of Power, Energy and Mechanical Engineering, North China Electric Power University, Beijing 102206, China 2School of Control and Computer Engineering, North China Electric Power University, 102206 Beijing, China aclp198@126.com, bliushi_ncepu@yahoo.com.cn, chys1986@126.com, dliuqian0607@163.com, elizhihong@ncepu.edu.cn Keywords: High-pressure water jet, flow field, axial velocity, dynamic pressure Abstract.
Fluent will be applied to the nozzle flow field numerical simulation, study the main physical quantities of the nozzle flow field distribution, and provide a reference for practical application.
Initially, the CFD model considers two-phase (air and water) flow, where air is treated as the primary phase.
Simulation results and analysis Velocity distribution of the nozzle flow field.
Flow field simulation and experiment of pre-mixed abrasive water jets outside the nozzle[J], Journal of China Coal Society, (2009), p. 410-414