Numerical and Experimental Investigation on Forced-Air Cooling of Commercial Packaged Strawberries

2019 ◽  
Vol 15 (7) ◽  
Author(s):  
Da Wang ◽  
Yanhua Lai ◽  
Hongxia Zhao ◽  
Binguang Jia ◽  
Qiang Wang ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Experimental Investigation ◽  
Simulation Model ◽  
Cooling Time ◽  
Air Cooling ◽  
Cooling Process ◽  
Uniformity Coefficient ◽  
Forced Air ◽  
Dynamics Method

AbstractThe numerical simulation model of forced-air cooling of strawberries in a clamshell and a box was established by using computational fluid dynamics method. The cooling process of the simulation and the experiment results agreed well in different conditions, indicating that the simulation model was validated. The results showed that the 7/8 cooling time was 180 min, 135 min, 108 min and 100 min and the cooling uniformity coefficients were 0.31, 0.22, 0.24, 0.26 when the diameters of B-vent(the vent on the box) were 30 mm, 40 mm, 50 mm, 60 mm, respectively. The 7/8 cooling time decreased and the cooling uniformity coefficient improved, when the shape of C-vent (the vent on the clamshell) changed from round to rectangular. The 7/8 cooling time also deceased and the cooling uniformity coefficient increased, when the area of C-vent with both round and rectangular shapes increased. These results indicate that both B-vent and C-vent had significant effect on reducing the cooling time and the improving cooling uniformity for strawberries, It is suggested that the optimized vent ratio of B-vent (the diameter is 40 mm) and C-vent (15 mm round or 20 mm × 15 mm rectangular) for the current commercial packaged strawberries were 9.4 % and 8.5 %, respectively.

Numerical Simulation of Flow Field of Air-Jet in Quenching Process

2014 ◽  
Vol 513-517 ◽  
pp. 2804-2807
Author(s):  
Xin Can Li
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Computational Fluid Dynamics ◽  
Flow Field ◽  
Air Cooling ◽  
Cooling Process ◽  
Outer Flow ◽  
Air Jet ◽  
The World ◽  
Quenching Process

The type of atomize-cool and air-cool are widely used in the world now. Air-jet is a very vital instrument in quenching by air-cooling. t is necessary to simulate the inner and outer flow-field of air-jet. By means of computational fluid dynamics soft system Fluent, numerical simulation of quenching air cooling process of air-jet was carried out. The work can support the actual production.

A review of computational fluid dynamics for forced-air cooling process

2016 ◽  
Vol 168 ◽  
pp. 314-331 ◽  
Author(s):  
Chun-Jiang Zhao ◽  
Jia-Wei Han ◽  
Xin-Ting Yang ◽  
Jian-Ping Qian ◽  
Bei-Lei Fan
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Air Cooling ◽  
Cooling Process ◽  
Forced Air

Analysis on Additional Pressure of Tube Sidewall of Immersed Tube Tunnel in Sinking Process of Tube Segment

2013 ◽  
Vol 387 ◽  
pp. 180-184
Author(s):  
Ya Dong Li ◽  
Hai Hong Mo ◽  
Jun Shen Chen
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Simulation Analysis ◽  
Lateral Wall ◽  
Special Position ◽  
Additional Pressure ◽  
Whole Process ◽  
Pressure Changes ◽  
Dynamics Method ◽  
Tube Segment

The numerical simulation analysis on the whole process of the tube immersing is researched, which use computational fluid dynamics method, is based on RNG k~ε turbulence model. The analysis shows that: additional pressure of tube lateral wall depends on the changed flow field cause by tube immersing; through the analysis, it have explored the special position of additional pressure changes in the process of immersing; it also shows some problems should be paid attention, through analysis the stress of special position.

scholarly journals A 3-D computational fluid dynamics model for forced air cooling of eggs placed in trays

2012 ◽  
Vol 108 (3) ◽  
pp. 480-492 ◽  
Author(s):  
Vikas Kumar ◽  
Ai Pheeng Wee ◽  
Sohan Birla ◽  
Jeyamkondan Subbiah ◽  
Harshavardhan Thippareddi
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Air Cooling ◽  
Dynamics Model ◽  
Computational Fluid Dynamics Model ◽  
Forced Air

Numerical Simulation on Adding Chamfer Angle of Direct Air Cooling Exhausted Duct for Large Thermal Power Generator

2014 ◽  
Vol 501-504 ◽  
pp. 2288-2292
Author(s):  
Chun Qing Wang ◽  
Cai Xia Bian
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Flow Resistance ◽  
Thermal Power ◽  
Air Cooling ◽  
Duct System ◽  
Power Generator ◽  
Power Generating Unit ◽  
Computational Fluid Dynamics Cfd ◽  
Balanced Flow

The optimal design for exhausted ducting mode and internal structure in direct cooling exhausted duct system influence every steam to assign the flow obstruction and flow while managing to assign directly.The flowing filed of steam in direct air cooling exhausted duct for 1000MW power generating unit is simulated via Computational Fluid Dynamics(CFD) software under typical steam turbine conditions,and the best chamfer angle can be get by adding different chamfer angles in back of exhaust pipe.The result shows that the steam flows through each distribution pipe with balanced flow under the condition of chamfer angle of 30 °and the flow resistance is much lower than before

scholarly journals Complex effect of recess depth in nozzle design on the discharge coefficient

2018 ◽  
pp. 43-50
Author(s):  
A. N. Sabirzyanov ◽  
A. N. Kirillova
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Experimental Investigation ◽  
Discharge Coefficient ◽  
Specific Impulse ◽  
Geometrical Parameters ◽  
Nozzle Design ◽  
Complex Effect ◽  
Flow Processes ◽  
Acceptable Agreement

We used contemporary computational fluid dynamics techniques to evaluate how the geometric parameters of a recessed nozzle affect the perfection of flow processes. We verified our numerical simulation and obtained acceptable agreement between numerical and experimental investigation results in terms of specific impulse loss. We plotted the discharge coefficient as a function of the geometrical parameters of a recessed nozzle. Our numerical investigation forms the basis of certain guidelines we developed for designing arc-based recessed nozzles.

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