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Numerical Simulation of Fluid Mixing in Micro-Mixers Supasit Prasertlarp and Sompong Putivisutisak* Department of Mechanical Engineering, Faculty of Engineering, Chulalongkorn University, Pratumwan, Bangkok, 10330, Thailand *sompong.pu@chula.ac.th, Tel.: +66-2-218-6337 Keywords: micro-mixers, water-ethanol mixture, CFD Abstract A 3-D numerical simulation is performed to study the flow dynamics and mixing characteristics between two different kinds of fluid within T-shaped micro-mixers.
Simulation method Consider two different kinds of fluid within T-shaped micro-mixers.
Simulations were performed using the commercial software, Ansys FLUENT 12.0.
Girault, Mixing processes in a zigzag microchannel: finite element simulations and optical study, Anal.
Xuereb, Design of micromixers using CFD modeling.

Its interactions between the building along the floodplain and the river dynamics can be simulated with Ansys Fluent as a simulation tool.
Ansys Fluent modelling is using CFD parameters, by creating geometric scenarios that have been physically tested.
From the simulation result, it is found that building geometry with larger openings is better at resisting the impact strength of floods and reducing the velocity of flood flows.
CFD Boundary Conditions CFD (Computational Fluid Dynamics) is the analysis of systems involving fluid flow.
CFD codes are structured around the numerical algorithms that contain three main elements: (i) a pre-processor, (ii) a solver, (iii) a post-processor [6].

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.

Computational fluid dynamics (CFD) has been widely used to analyze hemodynamics in stented arteries.
Therefore, it would be more realistic to construct CFD models based on curved instead of straight arteries.
Numerical simulations were performed on two stent designs deployed in straight and curved arteries with varying degrees of curvatures (0o, 30o, 60o, and 90o) for comparison.
The governing equations were solved by the commercial CFD solver ANSYS FLUENT using its pressure-velocity coupled algorithm.
Stent CFD Models.

Based on the simulation results, the measures to reduce NOX emissions can been token effectively [3].
This paper uses the extended Zeldovich theory, based on the CFD software STAR-CD to simulate and calculate the temperature and NOX formation rule of the CNG direct-injection engine in different crank angle.
The domain of the CNG engine working process simulation in the calculation includes intake and exhaust port and combustion chamber.
At the begin of the simulation, the intake inlet temperature is 300K, the relative pressure is 90kPa, and exhaust port temperature is 500K.
Figure2 shows the comparison of the experimental values and simulation values of cylinder pressure.

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).

The flow formulation was founded as console formulation, and with the body-fitted coordinate system and standard k - ε turbulent model, the numerical analysis of the internal 3-D incompressible turbulent flow of the agitated flow field was carried out by CFD software Fluent.
With the development of computer technology, CFD technology is playing a more and more important role in the development and design of the mixing equipment for its speed and economy.
This paper deals with the numerical simulation analysis on the agitated flow field of the submersible mixer (its diameter is 360mm, and its rotational speed is 1430r/min) by CFD software Fluent.
Control Equations The 3-D incompressible Reynolds time-averaged equations are adopted and enclosed by the standard ε−k turbulence model in the numerical simulation of the agitated flow field.

The 127 papers are grouped as follows:
Chapter 1: Aerodynamics and Aeronautic;
Chapter 2: Fluid Dynamics, CFD and other Computational Methods;
Chapter 3: Computational Techniques, Simulation and Numerical Analysis;
Chapter 4: Dynamics and Vibration;
Chapter 5: Motors, Combustion, Propulsion, Fuel and Emission Control;
Chapter 6: Instrumentation and Measurement, Control Systems and Automation;
Chapter 7: Trajectory Design, Navigation and Control;
Chapter 8: Materials Characterization and Technologies;
Chapter 9: Design, Industry and Manufacturing Technologies;
Chapter 10: Thermal Analysis Technologies, Heat Exchange Engineering and Applications.

This paper summarizes the two methods which are experimental research and numerical simulation to thermal environment of the tunnel.
Through CFD software, the radial temperature distribution of tunnel surrounding rock and the axial temperature distribution of air at winter and summer conditions are obtained which provide basis for further research on thermal environment.
In addition, the solving accuracy of numerical simulation is closely related to the operator, so it has great subjectivity.
The three-dimensional model established on the CFD software is shown in Figure 1.The whole computational domain is 15*500*20m which consist of soil horizon and concrete layer.
Research on Simulation and Evaluation System of Energy Conservation for Tunnel Ventilation System[J].

CFD Numerical Simulation Control equations.
In the case of numerical simulation calculation the selected vector high is 10m.
In order to analyze the effect of the turbulence models selection on the numerical simulation, the numerical simulation used RNGk -ε model.
[2] Wang, F.J., Computational fluid dynamics analysis of CFD software theory and application [M].
“Numerical Simulation of architectural shape coefficient of wind load .”J.