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The optimum design of the different passageways is then verified using CFD-ACE+ numerical software.
Therefore, this study uses mold core designs for different passageways to verify the optimal design using CFD-ACE+ numerical software.
Figure 5 shows simulation results for velocities and strain rates of the abrasive medium.
Figure 6 shows simulation results for velocities and strain rates of the abrasive medium.
First, CFD-ACE+ numerical software is an effective and precise simulation tool for demonstrating the optimum design of a six helices passageway.

Selective Laser Melting of Titanium Alloys: Simulation of Scanning Speed Effects with High Layer Thickness Piyapat Chuchuay1,a*, Kawintra Khemabulkul1,b, Patiparn Ninpetch2,c and Pruet Kowitwarangkul1,d 1The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut's University of Technology North Bangkok, Bangkok 10800, Thailand 2Department of Industrial Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi, Pathum Thani 12110, Thailand aPiyapat.c@tggs.kmutnb.ac.th*, bKawintra.thbkk@gmail.com, cPatiparn.n@en.rmutt.ac.th, dPruet.k@tggs.kmutnb.ac.th Keywords: Additive manufacturing, SLM, Ti-6Al-4V, DEM-CFD Simulation, High layer thickness Abstract.
Numerical Setup and Case Scenarios The Multiphysics simulation of the SLM process in this research was conducted using DEM-CFD (Discrete Element Method - Computational Fluid Dynamics) software, specifically FLOW-3D AM, with Ti-6Al-4V as the material.
Material properties used in the simulation [11].
This STL file was then uploaded to the CFD software FLOW-AM to simulate the temperature distribution and analyze the size and shape of the part after fabrication.
Comparison between simulation and experimental results.

Numerical Simulation of the Two-Phase Flow in Novel Combined Top and Corner Spray Degassing Tank for Aluminum Melt Hui Suna, Zhiyong Zhoub College of Mechanical Engineering, Shanghai Dianji University, Shanghai, China asunh@sdju.edu.cn, bzhouzhiyong@sdju.edu.cn Keywords: rotating spray degassing, combined top and corner spray degasser, two-phase flow, numerical simulation, gas volume fraction Abstract.
With the rapid development of Computational Fluid Dynamics (CFD) and its continuing industrial applications, the above status is changing.
It has been reported largely on the applications of CFD technique in two-phase flow field [1-6], but few work has been focused on the degassing of aluminum melt [1, 5-6], and the numerical simulations of combined top and corner spray degasser has not yet been presented.
In this work, CFD technique is employed to simulate the gas-melt two-phase flow in the novel combined top and corner spray degassing tank for aluminum melt.
CFD Analysis Method of Gas-Melt Two-Phase Flow Mathematical Model.

Thus, the simulation and verification about movement of bubbles have laid the foundation for the 3D thermal simulation of top-blown bath of Isa furnace.
It is very difficult to simulation.
The CFD simulation experiments are conducted on different input flow rate and depth of the lance showed in table 1 to get the calculating data of flow and temperature distribution.
Simulation Process.
MATUSEWICZ.CFD Modeling of Swirl and Nonswirl Gas Injections into Liquid Baths Using Top Submerged Lances[J].

Numerical simulation provided reliable theoretical reference for further engineering research of heat exchanger with helical baffles.
In recent years, computational fluid dynamics (CFD) got great progress due to the rapid development of computer technology.
The CFD method can solve problems in a shorter time and lower cost compared with traditional experimental method so that greatly reducing the input of human and material resources and realizing parametric analysis.
The CFD software has now become a powerful tool to solve all kinds of problems about fluid flow and heat transfer, which was successfully applied to various fields of science and technology.
The effect of thermal boundary condition of tube surface on CFD results can be ignored.

Using ANSYS-FLOTRAN-CFD software, the finite element simulation has been conducted by series of procedures, such as model building, meshing, loads applying and equation solving, the flow distribution in the sensitive element of the single nozzle and nozzle array fluidic gyro was calculated separately.
Array type nozzle diagram Finite element method for solving FLOTRAN CFD analysis capabilities in ANSYS were an advanced tools used to analyze 2D and 3D fluid flow field that can be used to simulate the movement of the air flow in the chamber [4].
This simulation usually included 3 steps, modeling, loading, and calculation
Conclusions Using ANSYS-FLOTRAN-CFD software, the finite element simulation is conducted by series of procedures, such as model building, meshing, loads applying and equation solving, the flow distribution in the sensitive element of the single nozzle and nozzle array fluidic gyro is calculated separately. the results showed that: (1) Due to gas diffusion, jet column along the propagation direction of a horn-shaped diffusion.
[4] Guoqiang wang: Numerical Simulation Technology for Practical Engineering and Its Pracitice on ANSYS, (Northwestern Polytechnical University Publications, 1999).

Study on the Numerical Simulation of Surface Flow and Heat Transfer in Inclined Wave Fin-and -tube Heat Exchanger Jun Zhai1, a, Meng Qin2,b and Fengguo Liu2,c 1North China Municipal Engineering Design & Research Institute, China 2TiaJin Institute of Urban Construction, China aZhaijun@chinagas.com.cn, btjcjqm@163.com, clfg_tj@126.com Keywords: Numerical simulation, Wave fin-and-tube, Heat transfer enhancement Abstract.
With the CFD calculation software FLUENT, numerical simulation has been conducted to study the surface flow and heat transfer in inclined wave fin-and-tube heat exchanger, including uniform angle wave fin and inclined increase-angle wave fin.
He et al. [2] performed 3D Numerical simulations on laminar heat transfer and fluid flow of plate fin-and-tube heat exchanger.The results showed that the enhancement of the convective heat transfer is inherently associated with the variation of the intersection angle.
Fig. 5 Curve between speed and heat transfer Fig. 6 Curve between speed and pressure drop Conclusions (1)Uniform angle wave fin and inclined increase-angle wave fin are numerically simulated with CFD.

This model can produce a fairly realistic simulation under most conditions [5].
When the thermal program is used to carry out a heat transfer analysis through linking the elements to the results of the CFD model, transmission of the thermal environment calculated by the CFD to the structure analysis program is reach.
Because the zone fire model is suitable for simulation of the general office and residential building, this system (RCfire) applies the zone fire model (CFAST) to produce a fire simulation.
As a result, a heat transfer analysis can be done through linking the elements to the results of the CFD model, and transmission of the thermal environment calculated by the CFD to the structure analysis program is reach.
Fiber beam element model for the collapse simulation of concrete structures under fire.

Investigation and Simulation of Supersonic Gas Jet for Martian Dust Removal Zhenlin Wanga, Heng Xub, Ruiqiang Yangc, Wenjin Guod Lanzhou Institute of Physics, Lanzhou, 730000, China awangzhenlin1979@gmail.com, b1832635634@qq.com, cyangruo@sina.com, dguowj2006@sina.cn Keywords: Gas Dynamics; CFD; Supersonic Gas Jet; Laval Nozzle; Martian Dust Removal.
The distribution of flow fluid field is obtained by CFD method.
Some valuable results are obtained by 5×5 matrix simulations and analyses.
Simulation of Flow Fluid Field.
Verification experiments according to the simulation results are the next work.

This paper is trying to use the mostly common used CFD code—FLUENT to model the catalytic decomposition of HTP in silver packed catalyst bed, to aid the design of the catalyst bed.
Before simulating it in the CFD code, some assumptions should be made to make the simulation soluble. a) The impurity of the solution is not considered. b) The silver catalytic bed is isotropic and the axial heat conduction is ignored. c) The products of the reaction are only oxygen and water-vapor.
Inputs for CFD simulations are summarized in table 1.
Fig. 2 2-D structure of catalyst bed Table 1 Inputs for CFD simulations Mass flow rate[kg/s] 0.002 HTP grade, % weight 90% Inlet temperature[ K] 300 Operating pressure[bar] 3 Porosity 0.5 Chamber diameter[mm] 10 Length of porous medium[mm] 25 Results and Discussions Assuming the reaction occurs adiabatically, a basic case is made to give the micro impression to understand the distribution of the flow field.
The ability of the CFD code as an aided design tool of catalyst bed should be further explored.