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Present work deals with the optimization for flow pattern of continuous phase in a sieve plate extraction column using both computational fluid dynamics (CFD) simulations and particle image velocimetry (PIV) measurements.
The comparison of CFD and PIV results showed that adding a gap between doughnut edge and column wall can improve the predictability of the simulation.
The group of Bart [5, 6] conducted single-phase flow and two-phase flow CFD simulation and PIV experiment to study two RDCs of 150 mm and 450 mm inner diameter respectively.
Fig. 8 showed the flow patterns derived from PIV measurement and CFD simulation at the water rate of 0.381m3/h.
Both CFD simulation and PIV measurement results consistently showed that in TSPEC, there was a large backflow area between every two plates; however, in MSPECs backflow area gradually reduced.

The CFD simulations are performed using Star-CCM+.
This paper demonstrates the use of CFD in an underground train station.
By using the software, the simulation of the smoke flow in the building can be simulated through basic CFD simulation methods [6].
In the CFD analysis, the extent of heat released need to be specified in order to run the simulation.
Blocken, CFD Simulation of cross-ventilation for a generic isolated building: impact of computational parameters, Building and Environment. 53 (2012) 34-48

CFD Simulation of an Airlift-driven Raceway Bioreactor for Microalgae Cultivation Weng Bin1, Shen Ying1, a, Chen Jiacheng1, Li Huabiao1, Liu Luming1, Deng Baocheng1, Huang Gengbin1 1College of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, Fujian, 350116, China ayshen@fzu.edu.cn Keywords: computational fluid dynamics (CFD); microalgae; airlift bioreactor; velocity distrubution Abstract: The objective of this paper is to optimize the design and structure of an airlift-driven raceway bioreactor via the computational fluid dynamics (CFD) simulation for microalgae cultivation.
Introduction Nowadays, computational fluid dynamics (CFD) has emerged as a powerful tool for simulation of flow behavior.
Luo et al. [4] attemptted to evaluate the reliability of using CFD simulations to generate trajectories of microorganisms in a draft tube column photo-bioreactor.
The quality of grids is very important to the computational fluid dynamics simulation.
The results showed that the ability of CFD to gain new insights in the bioreactor design.

The CFD analysis can save the cost and time.
Results and Discussion Computerized simulations were performed via the CFD software ANSYS/Fluent® to study the outdoor wind field for predicting the comfort level of three pavilions of Xinsheng Park in Taipei Flora Expo.
F. van Heijst, “CFD simulation of near-field pollutant dispersion on a high-resolution grid: A case study by LES and RANS for a building group in downtown Montreal”, Atmospheric Environment, vol. 45, 2011, pp. 428-438
Carmeliet, “Application of CFD in building performance simulation for the outdoor environment”, Building Simulatio, vol. 11, 2009, pp. 489-496
Glicksman, “Application of integrating multi-zone model with CFD simulation to natural ventilation prediction”, Energy and Buildings, vol. 37 , 2005, pp. 1049–1057

In current research, Computational simulation using CFD (Computational Fluid Dynamics) is performed with RANSE code in order to obtain catamaran performance in resistance.
Therefore, the accuracy of CFD for Semi-SWATH is analyzed by comparing the simulation result with experimental result in both catamaran and SWATH mode.
CFD application is widely used in resistance and wave profile prediction of ship.
CFD computational domain for Semi-SWATH CFX Numerical Simulation CFX is one of software capable in calculating ship resistance.
The simulation result shows that the CFD method applied is acceptable in predicting resistance values.

LTD. , Shanghai, 200444, China aemail: eternityer@163.com, bemail: 13601991068@126.com, cemail: jxie@shou.edu.cn Keywords: evaporative condenser; nozzle; CFD; numerical simulation Abstract.
Introduction Computational fluid dynamics (CFD for short) is a branch of fluid dynamics.
Currently, CFD is mainly used to analyze properties of heat or mass transfer of different kind of liquids by applying discrete mathematics methods to process numerical simulation against the computer technology [1-3], it is capable of simulating some complicated and idealistic problems, and solving some difficulties in practical applications.
This article is based on experiences of former CFD numerical simulation [11], using two types of nozzles which are produced in Shanghai Baofeng Machinery Manufacturing Company Limited to study the research of water spraying performance.
Study on Great Flow Nozzle Performance with CFD Method[J].

CFD modeling and simulation of transesterification reactions of vegetable oils with an alcohol in baffled stirred tank reactors Isabela M.
Thus, in this work, a CFD simulation of transesterification was performed, with reaction rates being evaluated by solving a set of differential equations describing the reaction kinetics.
Simulation Model Development The simulations were conducted with the CFX 12.1 code (ANSYS, Inc., USA).
Fig. 4 - Molar concentrations versus simulation time (in seconds) for the CFD simulation with 0.5, 1.0 and 1.5 kg/s flow rates of ethanol-KOH mixture utilizing Komers’ GEPASI constants.
Higher yield (43%) was obtained using these constants in the CFD simulation, but still there was a difference from the yield presented in [3], which can be calculated as 47%.

CFD simulations were conducted for different structure of the valve to verify the performance of the valve after redesign the internal flow structure.
Gamboa [4] present a method for optimizing valve shape using two-dimensional CFD in conjunction with an optimization procedure.
Zhang [7] use the CFD software to study the regulation of V-ball valve opening under different flow characteristics and numerical simulation analysis, combined with the experimental data, optimizing the of V-incision to the flow characteristics of the ideal line to improve the regulation characteristics of the valve.
The well-known CFD package, Fluent, including the Gambit grid generator, has been used to perform all the numerical computations.
CFD simulations were conducted for different structure of the valve to verify the performance of the valve after redesign the internal flow structure.

CFD Model of an Underfloor Air Cavity Created from Special Fittings and its Verification Using a Laboratory Model Tomáš Renčko1,a *, Anna Sedláková1,b 1Technical University of Košice, Vysokoškolská 4, 042 00 Košice, Slovak Republic atomas.rencko@tuke.sk, banna.sedlakova@tuke.sk Keywords: underfloor ventilation, special shaped unit, CFD simulation, laboratory experiment Abstract.
To assess the airflow in the air cavity, recently commonly used CFD simulations can be employed.
In this article CFD simulation of underfloor air cavity created by special fittings is verified by means of laboratory experiment.
The paper aims to highlight the possibilities of CFD computer simulation programs to assess airflow in underfloor cavities.
Šikula, CFD simulation of ventilated air cavity, Building Simulation and Environmental Engineering 2008, 5. conference, Czech Republic, 2008

CFD simulation on flow field of Gas-Liquid Taylor flow in circular capillaries Zhiqun Pan1,a, Xubin Zhang1,b, Jing Tang1,c,Wangfeng Cai1,d 1School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China azqpan563@126.com, btjzxb@tju.edu.cn, ctangjingwenjie@163.com,dwfcai@tju.edu.cn Keywords: CFD simulation; flow field; Taylor flow Abstract: Computational Fluid Dynamics (CFD) was used to simulate the flow field of gas-liquid Taylor flow in circular capillaries.
In this paper, the CFD simulations were adopted to study the flow field both inside liquid slug and within the liquid film during gas-liquid Taylor flow.
Simulations were performed in a reference frame in which the bubble is stationary and the system moves up with the bubble rise velocity.
The details of variations of parameters used in the simulations are listed in Table 1.
Conclusion CFD simulations have been used to study the influences of different parameters on both the Vx,top and Vx,film.