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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].

CFD Investigation on the Flow Structure inside Cooling Roll Yanming SONGa, Yang YANGb School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China aemail:sym0823@163.com, bemail:yang_mech@buaa.edu.cn Keywords: Cooling roll; CFD; Simulation; pressure distribution; streamline Abstract.
Different channel structures in the cooling roll are analyzed in this paper by computer fluid dynamic (CFD) method.
Therefore, CFD method is useful to study the performance of the channel.
Fig. 5 shows the pressure distribution of the three simulation models.
Conclusion By using CFD method as working platform, this paper conducts a numerical simulation of three different channels in cooling roll.

The geometry and dimensions of the new model of hydrocyclone used in CFD simulation are shown in Fig. 1 and Table 1. 7 Fig. 1.
CFD simulation is performed with the assumption that the solid particles are spherical, uniform distribution and a particle diameter of dp = 100 μm.
The experiment is useful to calibrate CFD simulation.
The Computational Fluid Dynamic (CFD) simulation hydrocyclone geometry has been optimized so that separation efficiency is maximized.
An important support in getting this geometry had and tracking trajectory solid particles into hydrocyclone CFD simulation.

Fatigue Analysis of Pure Waterjet Nozzle-A CFD and FEA Approach Quanchang Li1, a, Kai He1, b and R.
The results obtained from two simulations (velocity, pressure) show a good agreement with the theoretical predictions, which indicates that the approach based on CFD and FEA is absolutely feasible.
To predict the nozzle failure, a simulation approach based on CFD and FEA is adopted to analyze fatigue failure of pure waterjet nozzle and the first failure point inside nozzle is found out.
In addition, the turbulence model was used in the CFD.
The whole simulation process was shown in Fig. 1.

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.

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.

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.

However, CFD simulation produced a higher velocity in the vicinity of vortex zone when compared to experimental data.
Second-order upwind scheme (QUICK scheme, third-order MUSCL scheme) are recommended for the CFD simulation of ship airwakes with a modest increase in computational cost. y+ values from o(10) to o(1000) can all be accepted for the CFD simulation of ships(e.g., SFS1 ) with Reynolds number 108 or more.
Simulations were carried out with various spatial discretization schemes-mesh-Wind Over Deck (WOD) combinations by using commercial CFD program FLUENT.
However, velocity magnitude of CFD simulation was higher compared to experimental data.
The use of realistic geometries for use in CFD airwake simulations will, therefore, be used in future work.

CFD method can provide simulation results as accurate as those obtained with actual ship test method.
In this work, we chose a common simulation method in CFD, which is Reynolds Average Navier-Strokes [3].
Water and air are both involved in ship CFD simulation.
It can guaranteethe accuracy of the simulation result.
Mesh of YUKUN Simulation Condition With the cut-cell mesh, we made the CFD simulation in commercial in commercial software FLUENT.

CFD Simulation of Gas-solid flow in Dense Phase Bypass Pneumatic Conveying using the Euler-Euler Model Y.
The simulation was conducted using the commercial Computational Fluid Dynamic (CFD) software Fluent with the Euler- Euler model accounting for four-way coupling.
The results indicate that pressure prediction of the CFD simulation model for a bypass pipe is promising.
The Euler-Euler model was employed in the CFD simulation to predict gas-solid flow pressure in the bypass pipeline.
This research and simulation work is the initial step in CFD modelling of bypass pneumatic conveying.