Computational Fluid Dynamics Simulation about the Impact of Products on a Cold Store

2012 ◽  
Vol 170-173 ◽  
pp. 3550-3554
Author(s):  
Jing Xie ◽  
Yi Tang ◽  
Jin Feng Wang ◽  
Chen Miao ◽  
Yi Zheng
Keyword(s):  
Simple Calculation ◽  
Dynamics Simulation ◽  
Wall Function ◽  
Computational Fluid Dynamics Simulation ◽  
Lower Margin ◽  
Airflow Distribution ◽  
Cold Store ◽  
Main Steam ◽  
Volume Method ◽  
The Impact

The unreasonable airflow distribution often occurs in the cold store. Some specific parameters of airflow in the cold store are difficult to obtain in the practical experiments. The unreasonable airflow causes quality decline and large energy consumption. In this paper, the airflow distributions in an empty commercial cold store and the cold store filled with products were studied by CFD and investigated using the 3D modeling method which combined SIMPLE calculation method and finite-volume method. Meshes of the fan were refined locally with the airflow near the walls was modified by applying the non-wall function. Through comparing the airflow distributions in the empty cold store and in the cold store filled with products, differences such as the lower margin velocity, the smaller width and the deviation of the main steam in the cold store filled with products were found.

Computational Fluid Dynamics Simulation about Comparison of Different Forms of Return Air in a Small Cold Store

2012 ◽  
Vol 516-517 ◽  
pp. 1133-1138 ◽  
Author(s):  
Yi Tang ◽  
Jing Xie ◽  
Jin Feng Wang ◽  
Chen Miao ◽  
Yi Zheng
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Computational Fluid Dynamics ◽  
Flow Field ◽  
Finite Volume Methods ◽  
Dynamics Simulation ◽  
Wall Function ◽  
Computational Fluid Dynamics Simulation ◽  
Cold Store ◽  
Simulation Results

The quantity of the cold store in our country has been rapidly rising since the 1990s, however, the flow field in the cold store is difficult to obtain accurately by experiments. With reference to the experiences in previous numerical simulations in this paper, CFD is used for analyzing two forms of return air in the cold store with the Finite Volume Methods and the SIMPLE Revised. As a result, Combining with the non-equilibrium wall function, it is found that taking the way of return air on both sides of the fan is more reasonable and the cooling consumption of the empty cold store can be saved before the products enter the cold store. Furthermore, the numerical simulation results can provide reference for choosing fans in the small cold store.

Theoretical Study and CFD Simulation of Airflow Distribution through a Cold Store

2012 ◽  
Vol 170-173 ◽  
pp. 3543-3549 ◽  
Author(s):  
Yi Tang ◽  
Jing Xie ◽  
Chen Miao ◽  
Jin Feng Wang ◽  
Yi Zheng
Keyword(s):  
Cfd Simulation ◽  
Vertical Plane ◽  
Simple Algorithm ◽  
Three Dimension ◽  
Wall Function ◽  
3D Technology ◽  
Airflow Distribution ◽  
Cold Store ◽  
Airflow Field ◽  
Computational Fluid Dynamics Cfd

Recently, the quantity of the cold store has been increased quickly. It is a key point to improve the uniformity of airflow field to the cold store. In this paper, a model of simulating cold store by computational fluid dynamics (CFD) was introduced. Simple algorithm combined with Boussineq assumption was used and turbulent equation combined with standard wall function was applied to define the flow of air in the cold store. Both the structured mesh and unstructured mesh to cold store model were simulated. The simulation methods of airflow in a cold store between three-dimension (3D) technology and two-dimension (2D) technology were also discussed. The experiment was validated and proved that unstructured grid was in better agreement with the result of experiments and it was gotten that the three-dimension (3D) technology had a higher accuracy in simulation of airflow distribution. The airflow distribution in the vertical plane and horizontal plane in cold store were gotten, respectively.

Model Calm Water Resistance and Motion – Simulations, Experiments and Verification

2017 ◽  
Author(s):  
Renan Santana Pelícia ◽  
João Lucas Dozzi Dantas
Keyword(s):  
Water Resistance ◽  
Mesh Size ◽  
Simulation Method ◽  
Dynamics Simulation ◽  
Multiphase Model ◽  
Computational Fluid Dynamics Simulation ◽  
Towing Tank ◽  
Calm Water ◽  
Sinkage And Trim ◽  
The Impact

To assess the impact of each bow design on motion and drag, two platform supply vessel models (PSV) of same parallel middle body and stern were tested in deep water regime on the Towing Tank of the Institute for Technological Research of the State of São Paulo (IPT). Calm water resistance was measured for different operating condition (draft and speed). One of the models was also tested in waves. Moreover, the same Towing Tank tests conditions were re-created in Computational Fluid Dynamics simulation and the results of resistance, sinkage and trim were compared to appraise the reliability of the simulation method. Seeking a competitive performance compared to Towing Tank tests, the simulations’ mesh size was kept below 5 million cells and executed on the software STAR-CCM+ using a multiphase model (VOF) and the K-Omega turbulence model. As expected, the desired performance was achieved while providing consistent outcomes as most cases reached resistance errors below 5%, with better adherence at lower speeds.

Computational Fluid Dynamics Simulation of Influence of Different Intervals of Product to the Huge Cold Store

2013 ◽  
Vol 740 ◽  
pp. 226-231
Author(s):  
Jing Xie ◽  
Chen Miao ◽  
Yi Tang ◽  
Jin Feng Wang ◽  
Yue Zhao
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Air Flow ◽  
Vertical Direction ◽  
Flow Distribution ◽  
Experimental Methods ◽  
Dynamics Simulation ◽  
Computational Fluid Dynamics Simulation ◽  
Cold Store ◽  
Better Than

The cold store has developed rapidly since 1990s in China. The unreasonable air flow distribution in cold stores hasn't been solved effectually because of lacking of experimental methods. The uniform air flied can improve the effect of store and save the refrigeration cost in the store. In this article, the air flow distribution was simulated with different intervals between products in a huge commercial cold store based on the previous simulation and experimental experience. The results showed that the interval of 10cm between products at vertical direction was better than that of 15cm for storage.

scholarly journals Computational Depiction of Transportation Phenomenon Control using Auxiliary Draught in Cold Storage

2019 ◽  
Vol 8 (4) ◽  
pp. 9402-9408
Keyword(s):  
Cold Storage ◽  
Experimental Validation ◽  
Flow Analysis ◽  
Air Distribution ◽  
Closed Chamber ◽  
Airflow Distribution ◽  
Cold Store ◽  
Simulation Results ◽  
The Impact ◽  
Homogeneous Environment

Computational Flow Analysis Enables To Demonstrate Large Cold Storage Air Distribution. Thermal Performances Of The Cold Storage Are Based On Airflow Mechanism In A Closed Chamber. Experimental Investigation On Cold Store A Costly Affair Thus, In This Paper The Impact Of Auxiliary Draught System (Ads) On Airflow Distribution Is Carried Out With The Help Of Computational Fluid Dyanamics (Cfd). Experimental Validation Shows A 26% Of Error In Simulation Results. Cfd Results Reflect That Use Of Ads Reduces Cooling Time By 25%. Auxiliary Draught Ensures A Homogeneous Environment Inside The Plant.

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