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Numerical simulation of two-phase liquid–liquid flow in a new static mixer structure Hongyan Zhang 1,a, Haihong Dong2, b 1Xi′an University of Architecture and Technology, China 2 Xi′an University of Architecture and Technology, China azhanghongyan@xauat.edu.cn, bdonghaihonga@163.com Keywords: spiral belt with changing diameter,static mixer,mixing effect,numerical simulation Abstract.
The numerical simulation method was used to investigate the mixing process of two-phase liquid–liquid flow in water treatment by a commercial CFD code,namely Fluent.The k-ε model and species transport model were established to research this project.
Fig.4 Comparison between CFD and EXPERIMENT The experimental data and CFD results are consistent.
Conclusion In the present study, advanced CFD techniques have been used as a tool for the research of a new mixer.
Three conclusions can be obtained through the research: (1) The results obtained from numerical simulations for two-phase liquid–liquid flow in HEV static mixer with Re=20000 have been compared with experiment data.Both are in good agreement,which prove that the method of numerical simulation is feasible

In the past several decades, with the progress of computational fluid dynamics (CFD) and the development of computer technology, flow simulations based on the Euler/Navier–Stokes (N–S) equations become more and more capable of modeling non-linear and viscous effects more accurately.
In this paper, time marching analysis based on CFD-CSD method for a wing is used to capture the flutter boundary, in these simulations, the structure is given an initial velocity and the subsequent time evolution of the response is calculated to see whether it grows or decays.
Numerical Method Cfd Model and Its Solutions.
In the CFD numerical simulating, the governing equations are Navier-Stokes equations:
Simulation then proceeds to the next time step.

Simulation of Solid-liquid Two-phase Flow Inside and Outside the Abrasive Water Jet Nozzle R.G.
Feng 1,e 1 Center for Advanced Jet Engineering Technologies (CaJET), School of Mechanical Engineering, Shandong University, Jinan, 250061，China 2 School of Mechanical and Manufacturing Engineering, The University of New South Wales, Sydney, NSW2052, Australia a haojieyuan@sohu.com, bchuanzhenh@sdu.edu.cn, cjun.wang@unsw.edu.au, dluxyu@sdu.edu.cn Keywords: Simulation, Velocity field of flow, Abrasive water jet nozzle Abstract: Simulation of the velocity field of solid-liquid flow inside and outside the abrasive water jet nozzle was studied by the computational fluid dynamics software(CFD).
As the development of computer technology and computed mathematics, a new subject about the flow and flow engineering-CFD becomes mature, the sign is that many CFD software appeared.
Many experts in domestics and abroad have used the CFD software to solve many problems which can not be solved by theory and experiment method.
This study used CFD software-Fluent to simulate the field of solid-liquid two-phase flow inside and outside the abrasive water jet nozzle.

Based on the analysis, the simulation result is qualitatively discussed referring to the factual conditions of the engine for validating the feasibility of analysis method.
The appropriate relationships of these stresses can be built by turbulent models, such as the standard model, which is widely used in engineering, is adopted in this paper; this model is a semi-empirical model of the two equations of the turbulent kinetic energy and the diffusion rate , the control equations are as follows: （2） where, represents the fluid’s density, represents the fluid’s dynamical viscosity coefficient, represents the turbulent viscosity coefficient, represents the turbulent kinetic energy created by the average velocity grads. 3 Interpolation method of CFD-CSD Because CSD and CFD mesh disaccord, CSD mesh is sparseness then CFD mesh, so you must insert the CSD displacement of mesh node to CFD mesh node to make the data exchange.
Mathematical Simulation.
The MFX-ANSYS/CFX coupling platform is developed by the ANSYS Corporation to realize the coupling calculation between CFD and CSD.
Based on the analysis, the simulation result is qualitatively discussed referring to the factual conditions of the engine for validating the feasibility of analysis method.

Analysis of Heat Island Intensity in Urban Blocks Using Coupled Simulation Jing Liu1, a, Fei Ma1,b and Fan Li1,c 1School of Mechanical Engineering, University of Science & Technology Beijing, China a Jingliu1998@yahoo.com.cn, b yeke@ustb.edu.cn, c jeckr@126.com Keywords: Heat Island, Urban Blocks, CFD, Urban Canopy Model Abstract.
In this paper, a building canopy model is coupled with CFD for the analysis of microclimates within urban blocks under different urban and architectural planning.
The simulation results show that heat released from the air conditioning systems is one of the most important factors affecting outdoor thermal environment.
In order to estimate the likely effects of such modifications it is necessary to develop effective simulation methods for urban thermal environment.
CFD Model.

Boundary Conditions and Constraint Equations for Simulation of Energy Exchange Poruba Zdenek1,a, Szweda Jan2,b and Podesva Jiri3,c 1,2,3Technical University of Ostrava, 17. listopadu 15, 708 33 Ostrava – Poruba, Czech Republic azdenek.poruba@vsb.cz, bjan.szweda@vsb.cz, cjiri.podesva@vsb.cz Keywords: Boundary Condition, Constrain Equation, Temperature, Heat Flow, CFD Simulation, Heat Exchanger.
The contribution and presented work deals with the CFD simulation of heating and air conditioning process of a special vehicle.
Introduction The subject of the presented paper is the CFD analysis of the special vehicle for passenger transportation in extreme climatic conditions.
The emphasis is placed on the introduction of possible, acceptable simplifications which make possible the reduction of computational costs and thus acceleration of the CFD simulation.
Figure 4 Temperature distribution – heating Figure 5 Streamlines - heating Figure 6 Temperature distribution–cooling Figure 7 Temperature distribution-cooling Summary The advantages of use of constraint equations and boundary conditions were presented on the problem of CFD simulation of heating and air conditioning of the special vehicle.

The numerical analysis was performed using Computational Fluid Dynamics (CFD) with Autodesk CFD software.
Software and computational resources The collector simulations were performed using Autodesk® CFD, a commercial software with an academic license, which has shown good agreement with experimental data in other CFD studies [43-45].
Their collector simulations were reproduced to determine the error associated with using Autodesk CFD to simulate the operation of flat plate collectors of this type.
Table 5 summarizes the results and the associated error obtained with the Autodesk CFD simulation.
Bhardwaj, A review on the simulation/CFD based studies on the thermal augmentation of flat plate solar collectors.

Study on inner vortex in a hydrocyclone through numerical simulation ZHUO-LUN CEN 1,a, JI-GANG ZHAO 1,b and BEN-XIAN SHEN 1,c 1 State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, CHINA acenzhuolun@hotmail.com, bzjg@ecust.edu.cn (corresponding author), csbx@ecust.edu.cn Keywords: Hydrocyclone, CFD, Fluent, Inner vortex Abstract.
This work presented a computational fluid dynamics (CFD) simulation to predict and to evaluate the effects of inlet velocity and the diameter of overflow tube on the inner vortex.
The calculation was carried out using commercial CFD code Ansys Fluent 14.0.
The introduction of numerical simulation tool CFD (Computational Fluid Dynamics) can provide a better understanding of the rotational and high-turbulent flow in the interior of hydrocyclone2.
The entire geometry was meshed by sweep method of structural hexahedrons, which is accessible to faster and more accurate results in CFD.

Numerical Simulation Study of the Influence of Ceiling Materials to Roof Radiation Heat Exchange Songtao Hu, Feng Qi , Teng Xie,Xinxin Wang,Gang Wang and Guodan Liu Institute of Environmental&Municipal Engineering, Qingdao Technological University, Qingdao, 266033, China E-mail: qfsummit@163.com Keywords: CFD numerical simulation, Roof radiation heat exchange, Ceiling materials, Thermal physical properties Preface Abstract.
This article focuses on the study of the influence of ceiling materials to roof radiation heat exchange by CFD numerical simulation, which provides a theoretical basis for the choice of ceiling materials from the perspective of thermal properties.
Therefore, we select three kinds of ceiling materials: fiberboard, gypsum board and aluminum alloy plate, which are usually used in interior design, to study of the influence of ceiling materials to roof radiation heat exchange by CFD numerical simulation, which provides a theoretical basis for the choice of ceiling materials from the perspective of thermal properties.
The diagram of physical model Simulation results and their analysis C.
Radiative cooling calculation method based on the simulation of the ceiling. 2010 National HVAC Annual Conference

The effects of varying tip gaps are studied using CFD simulations for overall pressure rise and flow physics of the tip flow at the design point and near the peak pressure point.
The effect of varying tip gaps are studied using CFD simulations for overall pressure rise and flow physics of the tip flow at the design point and near the peak pressure point.
A quick comparison between CFD results and rig test with 3% tip clearance rotor was carried out to establish a reasonable basis for detailed CFD analysis.
Fig. 1 Rotor performance comparison between rig test data and CFD simulations CFD Studies The generation of the rotor blade model and grid has been done using the software ANSYS Turbogrid© while the simulations were carried out using the commercial package ANSYS CFX©.
A mesh size of 3.1 million was chosen for the simulations after a grid independence study.