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Recent advances in CFD modeling make it possible for three-dimensional (3D) simulations of complex multiphase flows in columns.
It is remarkable to note that the clear liquid height obtained from the CFD simulations agrees well with the experiment data of Zhou .et al [3].
Fig. 3 Comparison of irrigated pressure drop between two-phase CFD simulation results and experimental correlation data (QL=12.5 m3/m2/h) Flow regimes transition of ripple tray.
The results of the clear liquid height, irrigated pressure drop from the CFD simulations show good agreement with experimental correlations.
Therefore, Present work shows that CFD simulations can be a powerful tool for further investigation and design of distillation trays without downcomer.

After simplified model, CFD can be used in the simulation of the biological reactors.
A recent study of CFD model, used two-phase (air and liquid) and three-phase (air, liquid and solid) flow for three-dimensional MBR simulation [9].
The CFD simulation of ALOD is verified by particle dynamic analyzer experiment (PDA).
Meroney and Colorado used a small anaerobic digester reactor to study the tiny differences of CFD simulation between different CSTR systems [16].
CFD simulation is mainly used for basic process, but rarely involves the variation process.

Investigation of CFD method simulating hydrodynamic performance of AUV with complicated shape WANG Yaxing1,a, PANG Yongjie1, GAO Ting1, Wang Jian1 1 Science and Technology on Underwater Vehicle Laboratory, Harbin Engineering University, Harbin, 150001, China awang-yaxing@hrbeu.edu.cn Keywords: PMM; AUV; CFD Abstract: Analyze veracity and computing efficiency of direct route drag of axis symmetry revolution body with 2D Computer Fluid Dynamic (CFD) method by comparing to the experiment data, discuss affection of different wall boundary functions to the results when calculating Automatic Underwater Vehicles (AUVs) hydrodynamic performance in CFD method.
CFD simulation of direct or oblique towing test Steady RANS equations could be adopted to calculate force and moment of AUV when simulating direct, or oblique, towing test, because relative motion does not happen.
Force calculation of non-revolution body and ordinary AUV. 2D method could not be applied to simulation of non-revolution body and ordinary AUV, however, most AUVs are bilateral symmetry, half of a fluid field could be meshed to do the simulation, this is also a good method to save time.
Fig 4 Layer mesh Heave and pitch simulation with CFD method Mesh law.
Comparison of simulation results.

CFD Simulation for a New Ducted-Fan UAV Configuration Zamri Omar Department of Aeronautical Engineering, Faculty of Mechanical & Manufacturing Engineering University of Tun Hussein Onn Malaysia, 86400 Parit Raja, Batu Pahat, Johor, Malaysia zamri@uthm.edu.my Keywords: ducted-fan UAV, CFD, aerodynamics.
Grid And Mesh Preparation The general process of conducting CFD analysis starts from developing the computer-aided-design (CAD) model, prepare the grid and mesh, and finally run the CFD simulation.
CFD Simulation The CFD simulation of the ducted-fan UAV model is conducted in Fluent®.
There are several parameters need to be defined prior to CFD simulation such as the operating conditions and boundary conditions.
The range of angle of attack, a for this simulation is from 0o to 100o .

The results of the simple assessment method are verified by performing CFD simulations to corroborate the correlation between simplified assessment method and CFD simulation result, an R2 value of 0.87 is obtained.
The R value is obtained by regression analysis of the CFD simulation results, and R2 is between 0.80 and 0.99.
(Fig. 7) This kind of assessment method is confirmed by CFD simulations, and the R2 value equals 0.71, corroborating the correlation.
This study adapted CFD simulations to calculate low wind speed area.
The results of CFD simulation are then used to calculate the scope of low wind speed area using various models.

According to the CFD simulation results, the structures and positions of flow baffles in the draft-tube were optimized to obtain the uniform flow rate distribution in the quench zone, which were verified by experiments as well.
In order to highlight the effect of flow baffles on the flow rate in a quench tank, the CFD simulation has been carried out for the flow rate distribution without / with flow baffles, and the flow rates were measured by a UDV to verify the simulation results as well.
Results of CFD simulation.
In order to obtain the uniform flow rate distribution, CFD simulations had been performed for many design cases with different structures and positions of the flow baffles in the quench tank.
Although discrepancy exists, the CFD simulation can exhibit the actual tendency of the flow rate distribution in the quenching zone to some extent.

The effects of mixing intensity and product removal location on solid concentration distribution in the crystallizer were studied by CFD simulation with multiphase model for different sizes of particles.
With the development of computational fluid dynamics (CFD) technology, the CFD was considered as a powerful tool for predicting the solid suspension by using multi-phase simulation [4].
The size-dependent classification function was also studied for a crystallizer with the multi-phase CFD simulation by Sha [7].
However, there were only a few works done to describe solid suspension on the continuously operated system with CFD simulation [9].
Conclusion CFD simulation was applied for the study of solid concentration distribution in a continuously operated DTB crystallizer.

Theoretical Study and CFD Simulation of Airflow Distribution Through a Cold Store TANG Yi1,a , XIE Jing1, b, MIAO Chen1,c,WANG Jin-Feng1,d, Zheng Yi1,e College of food science and technology, Shanghai Ocean University, Shanghai, 201306, China aemail:kaixinfa@yahoo.cn , bemail: jxie@shou.edu.cn, cemail: mcaibj@sina.cn Keywords: Cold store; CFD; Simulation; Airflow distribution Abstract: Recently, the quantity of the cold store has been increased quickly.
Compared to the actual experiment research, CFD simulation can save much money and time due to its advantage of changing experiment condition easily by the software.
CFD technology has been applied in different kinds of field in cold store simulation (temperature, pressure, velocity, etc) [2-4].
CFD Simulation Approach Mathematical and physical models.
CFD model of the airflow, heat and mass transfer in cool stores[J].

Numerical Simulation of the Gas Phase of Cyclone- separator Sand Trap Based on ICEM CFD and FLUENT Yan Huang1, a, Manquan Zhao＊1,b, Hantao Liu2,c 1 Mechanical and Electrical Engineering College of Inner Mongolia Agricultural University, Hohhot 010018 China 2 Food Science and Engineering College of Inner Mongolia Agricultural University, Hohhot 010018 China awuxinglaozu@163.com, bnmgzhaomq@163.com, c28715369@qq.com Keywords: cyclone separator, sand trap, ICEM CFD, simulation analysis, Reynolds stress Abstract.
Meshing ICEM CFD is a powerful pre-processing software, which can provide high-quality grid for mainstream CFD software (such as FLUENT, CFX) and complete pre-processing work of ANSYS, Abaqus and LS-Dyna.
ANSYS ICEM CFD has rich geometric interface, in this paper, three-dimensional model of the sand trap is imported into ICEM from Pro/E, using the interface between Pro/E and ANSYS ICEM CFD.
Numerical simulation of liquid-liquid turbulent separation flows in a double-cone hydrocyclone[J].
Study and numerical simulation on gas-solid two-phase characteristic of cyclone separator[D].

Particles separation of hydrocyclone based on CFD simulation Jing Song1, a, Wei He1, b, Zhekun Li1, c, Wenli Shi1, d 1College of Mechanical and Electrical Engineering, Kunming University of Science and Technology (KUST), Kunming 650500, China a32096390@qq.com, bhw_big@126.com, czhekunlikust@sina.com, d27666869@qq.com Key words: Hydrocyclone, CFD simulation, Flow field, Particles separation Abstract.
By using CFD software, the important parameters of velocity and pressure in the hydrocyclone are analyzed and contrasted.
Particles separation of hydrocyclone Numerical simulation is a new research method for the hydrocyclone flow field, this paper will research the flow field of hydrocyclone based on the commercial CFD software FLUENT. 3.1 FLUENT software description FLUENT software is a general computational fluid dynamics software, which use computer simulation method to complete flow, heat transfer and other physical phenomena simulation.
If the wall pressure gradient is relatively small, the simulation results agree well with experiment.
The results of flow field simulation will help to finish structure design of hydrocyclone.