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Full-Text Articles in Food Biotechnology
Structural Optimization And Material Separation Characteristics Of An Updraft Rice Mill Based On Cfd-Dem, Li Yuan, Zhou Long, Fan Jijun, Yu Nanhui, Yang Yong
Structural Optimization And Material Separation Characteristics Of An Updraft Rice Mill Based On Cfd-Dem, Li Yuan, Zhou Long, Fan Jijun, Yu Nanhui, Yang Yong
Food and Machinery
[Objective] To enhance the separation efficiency of rice bran and broken rice in an updraft rice mill by optimizing the air duct structure and operating parameters. [Methods] A combined approach of CFD-DEM coupled numerical simulation and experimental verification was adopted to investigate the material separation characteristics of the updraft rice mill under different structural and operating parameters. Key parameters, including air duct width, air velocity, baffle width, and baffle spacing, were optimized through single-factor experiments and response surface methodology. [Results] The addition of baffles at the lower suction inlet improved the pressure and flow velocity distributions within the air duct …
Numerical Simulation Of Humidity Field In Baijiu Fermentation Rooms And Influencing Factors, Hao Qi, Shi Yan, Yang Zhengquan, Lin Chunsong, Xu Guangqi, Wen Enhan
Numerical Simulation Of Humidity Field In Baijiu Fermentation Rooms And Influencing Factors, Hao Qi, Shi Yan, Yang Zhengquan, Lin Chunsong, Xu Guangqi, Wen Enhan
Food and Machinery
[Objective] To investigate the effects of ventilation conditions and Daqu stacking methods in the fermentation room on the humidity levels at various points within the room. [Methods] A three-dimensional unsteady gas-solid coupling model of a small-scale fermentation room is established. Then, the humidity field variation patterns in the room are analyzed using the height of the humidifying air supply outlet (H), the interlayer spacing of fermentation racks (h), and the gap between fermentation piles (δ) as variables. Additionally, multi-objective optimization is performed based on response surface methodology (RSM) and the non-dominated sorting genetic algorithm II (NSGA-II). [Results] H, h, and …
Simulation Study Of Controlled Atmosphere Storage Environment For Sweet Potatoes Using Modular Turnover Boxes, Hu Rusheng, Liu Yin, Meng Zhaofeng, Zhang Fan, Wu Feijun
Simulation Study Of Controlled Atmosphere Storage Environment For Sweet Potatoes Using Modular Turnover Boxes, Hu Rusheng, Liu Yin, Meng Zhaofeng, Zhang Fan, Wu Feijun
Food and Machinery
Objective: To mitigate unfavorable factors during the packing, transportation, and storage of fruits and vegetables, a foldable, preassembled turnover box was designed based on the premise of recycling. Methods: Standardized boxes were used to hold sweet potatoes, which were considered long rotating ellipsoids, and the storage environment was modeled. A porous medium model, a species transport model, and a local non-thermal equilibrium model were used to study the temperature, humidity, speed, O2 volume fraction, and CO2 volume fraction distributions in the cargo area during the curing warming, post-curing cooling, and storage stages. Results： 40 ℃ was the optimum …
Numerical Simulation Of The Effect Of Freezing Sword Structure On The Ice Performance Of Block Ice Machine, Sun Huan, Yang Kai, Liu Xiaotong
Numerical Simulation Of The Effect Of Freezing Sword Structure On The Ice Performance Of Block Ice Machine, Sun Huan, Yang Kai, Liu Xiaotong
Food and Machinery
Objective: To add a freezing sword inside the evaporator of the ice mould of a direct-cooled block ice machine to achieve rapid ice production. Methods: COMSOL was used to simulate the effects of the cross-sectional shape of the freezing sword and the freezing sword inclination angle on the ice production process. Results: As the ice making process continued, the average internal temperature of the ice mould with additional freezing swords of different cross-sectional shapes decreased and the volume fraction of solid phase in the ice mould increasedd with time, but the average internal temperature of the ice mould with additional …
Cfd Simulation And Structure Optimization Of The Industry-Scale Microfluidization Interactive Chamber, Mei Liren, Xu Keping, Ai Fanrong, Dai Taotao, Chen Jun
Cfd Simulation And Structure Optimization Of The Industry-Scale Microfluidization Interactive Chamber, Mei Liren, Xu Keping, Ai Fanrong, Dai Taotao, Chen Jun
Food and Machinery
Objective: Solving the problems of high feed requirement, low flow rate and poor treatment effect of industrial-scale microfluidizer （ISM） in practical application. Methods: Combining CFD-PBM simulation and emulsion preparation test, four kinds of interactive chambers were optimized, and the final shape was obtained by size optimization. Results: Four kinds of interactive chambers had larger flow rate and hole diameter than the original interactive chamber. The effect of particle size reduction was T-impact type ＞ T double impact type ＞ cross impact type ＞ two shunt type. Shear force mainly existed in the shunt zone, impact force mainly existed in the …
Numerical Simulation Of Phase Change Cold Storage Plates With Different Packaging Structures Used In Cold Storage, Liang Hanwei, Chen Guansheng, Xie Jian, Ying Wenxuan, Cheng Zijie
Numerical Simulation Of Phase Change Cold Storage Plates With Different Packaging Structures Used In Cold Storage, Liang Hanwei, Chen Guansheng, Xie Jian, Ying Wenxuan, Cheng Zijie
Food and Machinery
Objective: To study the application of phase change energy storage in peak-shifting of cold storage electricity, and propose a more effective encapsulation structure for the cold storage plate. Methods: Multiple phase change cold storage plate encapsulation structures were designed for the frozen goods cold storage, and corresponding numerical models were established. Through numerical simulations, the solidification and melting cooling processes of different encapsulated cold storage plates were tested at standard temperatures （-18 ℃）. The similarities and differences between flat and concave-convex cold storage plates were compared, and the impact of different cold storage plates on temperature fluctuations within the storage …
Numerical Simulation Of Factors Affecting Flow Characteristics Of Double-Circular-Arc Gear Pump, Huang Cheng, Xu Kai, Wei Zhibo, Li Geqiang
Numerical Simulation Of Factors Affecting Flow Characteristics Of Double-Circular-Arc Gear Pump, Huang Cheng, Xu Kai, Wei Zhibo, Li Geqiang
Food and Machinery
Objective: Analyzed the influencing factors of the internal flow field pulsation characteristics of the new double circular arc gear pump, and adopt reasonable parameters to improve the output efficiency of the gear pump. Methods: The two-dimensional flow field simulation model of the gear pump was established, and the computational fluid dynamics software Fluent was used for simulation analysis to study the influence of different tip clearance, different gear eccentricity, load and speed on the instantaneous flow, flow pulsation and flow field characteristics of the oil outlet of the gear pump. Results: As the tooth tip clearance increased, the outlet flow …
Simulation Analysis Of Influence Of Pitch Variation On Flow Field Of Twin Screw Extruder With Different Direction, Zhang Yiming, Huang Zhigang, Xu Zhen, Cheng Yuanyuan
Simulation Analysis Of Influence Of Pitch Variation On Flow Field Of Twin Screw Extruder With Different Direction, Zhang Yiming, Huang Zhigang, Xu Zhen, Cheng Yuanyuan
Food and Machinery
Objective: Taking polylactic acid （PLA） as an example, the flow channel distribution of twin-screw extrusion under different pitch was studied. Methods: In Solidworks, two 3D models with variable pitch and constant pitch were drawn according to the theoretical end curve equation and modified. Workbench software was used to generate the required analysis models with the swept mesh method for the two screw configurations, and then Polyflow fluid simulation software was used to simulate the actual situation. After obtaining the post-processing results, FieldView software was used to analyze the final results. The pressure, shear rate and viscosity of polylactic acid fluid …
Simulation Analysis Of Flow Channel Of Different Twin-Screw Extruder With Different Groove Depth, Zhang Yiming, Huang Zhigang, Yang Yanan
Simulation Analysis Of Flow Channel Of Different Twin-Screw Extruder With Different Groove Depth, Zhang Yiming, Huang Zhigang, Yang Yanan
Food and Machinery
Objective: The flow channel distribution of polylactic acid （PLA） in different groove depths of a double screw extruder was discussed. Methods: Three kinds of screw elements with different depth of screw groove and their corresponding flow channel models were established by Solidworks software. Polyflow fluid simulation software was used for numerical simulation, and FieldView software was used for numerical analysis of post-processing results. The pressure field, shear rate field, viscosity field and residence time distribution curve （RTD） of polylactic acid （PLA） in three different screw extruders with different groove depths were studied. Results: The depth of the screw groove was …
Effects Of Screw End Face Structural Parameters On Polylactic Acid Flow Field In Meshing Counter Rotating Twin Screw Extruder, Zhang Yi-Wei, Huang Zhi-Gang, Shang Jia-Wei, Liu Zhong-Yao, Yang Ya-Nan
Effects Of Screw End Face Structural Parameters On Polylactic Acid Flow Field In Meshing Counter Rotating Twin Screw Extruder, Zhang Yi-Wei, Huang Zhi-Gang, Shang Jia-Wei, Liu Zhong-Yao, Yang Ya-Nan
Food and Machinery
Objective: To investigate the effect of the screw configuration on the polylactic acid flow field on the structural parameters of the screw on the end face of the screw in the meshing counter rotating twin screw extruder. Methods: The theoretical model of the heterodirectional double-ended threaded element was established by Solidworks software and the geometry of the threaded element after adjusting the structural parameters in two different ways. The established three-dimensional model was imported into Gambit software for meshing, and then Polyflow software was applied to the flow field simulation calculation. Finally, the flow field distribution results were extracted by …
Motion Parameter Optimization Of Reciprocating Vibrating Screen Based On Discrete Element Method, Ren Ning, Wang Zhong-Ying, Bai Xiao-Li, Wu Wen-Bin
Motion Parameter Optimization Of Reciprocating Vibrating Screen Based On Discrete Element Method, Ren Ning, Wang Zhong-Ying, Bai Xiao-Li, Wu Wen-Bin
Food and Machinery
Objective: To determine the precise quantitative relationship between screening efficiency and motion parameters for reciprocating vibrating screen, and to obtain the movement parameters with the optimal screening efficiency. Methods: Rocky was adopted to accurately simulate the movement behavior for wheat grain and wheat stem in the screening process, many factors orthogonal simulation test was used to investigate the effect of vibration frequency, amplitude, vibrating direction angle and screen surface inclination angle on screening efficiency. Results: The movement behaviors of wheat in the screening process was consistent with the theory analysis, which verified the correctness and feasibility of numerical simulation using …
Study On The Applicability Of Two Numerical Models For Simulation Of Infrared Turbulent Spouted Bed
Study On The Applicability Of Two Numerical Models For Simulation Of Infrared Turbulent Spouted Bed
Food and Machinery
Objective： This study aimed to obtain suitable turbulence model for simulation infrared combined spouted bed numerical valued. Methods: Two equation models (SST k-ε and Realizable k-ε) were used for numerical simulation to obtain the performance parameters of the infrared spouted bed and the velocity, temperature and particle concentration distribution of the flow field in the drying chamber under different working conditions. The particle drying experiment of the infrared spouted bed was carried out. Results: When under the working conditions of air inlet velocity of infrared spouted bed drying chamber of 8 m/s and a temperature of 50 ℃, the values …
Effects Of Screw Arrangement In Four Screw Extruder Impact On Characteristics Of Polylactic Acid Flow Field, Shang Jia-Wei, Huang Zhi-Gang, Zhang Yi-Ming, Yang Ya-Nan, Dai Xiang-Ji
Effects Of Screw Arrangement In Four Screw Extruder Impact On Characteristics Of Polylactic Acid Flow Field, Shang Jia-Wei, Huang Zhi-Gang, Zhang Yi-Ming, Yang Ya-Nan, Dai Xiang-Ji
Food and Machinery
Objective: The flow channel distribution of polylactic acid in four screw extruder with different screw arrangement was studied. Methods: The three-dimensional modeling software Solidworks was used to establish the screw model and the corresponding fluid region model under the arrangement of one-word screw, four-square screw and encircle screw. Numerical simulation was carried out by the simulation software Polyflow. Results: The screw arrangement of monotype and surround type had better pressure building ability and distribution mixing ability than the square arrangement, and the square arrangement had weaker transport ability of polylactic acid. Conclusion: The four-screw extruder with one-line screw arrangement has …
Numerical Simulation Of Pitaya Freeze-Drying Process Based On Fractal Theory, Zhang De-Zheng, Yu Ke-Zhi, Zhang Tong
Numerical Simulation Of Pitaya Freeze-Drying Process Based On Fractal Theory, Zhang De-Zheng, Yu Ke-Zhi, Zhang Tong
Food and Machinery
Objective: To optimize the drying characteristics of dragon fruit freeze-drying process. Methods: Based on the fractal theory and the theory of heat and mass transfer in porous media, the COMSOL software was used to numerically simulate red pitaya slices with a thickness of 8, 10, 12, 14 mm and a radius of 40 mm to simulate the sublimation and drying stage of pitaya. The heat and mass transfer process in the internal porous medium, the real-time displacement of the ice interface during the ice sublimation process is obtained, the sublimation period is predicted, and the experimental verification is …
Study On Optimization Of Motion Parameters Of Catfish Headless Processing Device Based On Fem, Li Chen-Yang, Shan Hui-Yong, Zhang Cheng-Hao, Tian Yun-Chen, Wei Yong
Study On Optimization Of Motion Parameters Of Catfish Headless Processing Device Based On Fem, Li Chen-Yang, Shan Hui-Yong, Zhang Cheng-Hao, Tian Yun-Chen, Wei Yong
Food and Machinery
Objective: Improve the mechanization and automation of the pretreatment process of China’s freshwater fish processing industry. Methods: The catfish head cutting simulation model is constructed by the numerical analysis software ANSYS/LS-DYNA, and the catfish head removal process is simulated and analyzed and the motion parameters are optimized by FEM. The blade speed and transportation speed are adjusted with the minimum cutting power consumption as the optimization goal, and the accuracy of the simulation results is verified by the prototype test. Results: When the speed of the blade is 850 r/min and the conveying speed is 14 cm/s, …
Influence Of Different Screw Configurations On The Flow Field Of Intermeshing Co-Rotating Twin-Screw Extruder, Zhang Xue-Chen, Zhang Li-Mei, Huang Zhi-Gang, Zhong-Yao, Li He
Influence Of Different Screw Configurations On The Flow Field Of Intermeshing Co-Rotating Twin-Screw Extruder, Zhang Xue-Chen, Zhang Li-Mei, Huang Zhi-Gang, Zhong-Yao, Li He
Food and Machinery
Objective:To explore the influence of different screw configurations of intermeshing co-rotating twin -screw extruder on the flow field and improve the material properties of PLA.Methods:The geometric model of double threaded element was established by using Solidworks software, and the numerical simulation was carried out in Polyflow. The post-processing analysis of the simulation results was carried out with the help of Fieldview software. The shear rate field, pressure field, velocity field, viscosity field and the residence time distribution RTD were compared to obtain the influence of screw groove depth on the flow field.Results:When the center distance …
Effects Of Flow Field Distribution On Freezing Characteristics Of Mashed Potatoes, Li Yao, Wan Jin-Qing, Wang You-Jun, Sun Xiao-Lin, Tong Nian
Effects Of Flow Field Distribution On Freezing Characteristics Of Mashed Potatoes, Li Yao, Wan Jin-Qing, Wang You-Jun, Sun Xiao-Lin, Tong Nian
Food and Machinery
Objective:To understand the effects of changing the arrangement and position on the freezing characteristics of potato mash and the energy consumption of refrigeration equipment.Methods:Gambit was used to complete the establishment of the three-dimensional numerical model for the air blast freezing of mashed potato. At the same time, fluent 6.3 was used for unsteady state simulation, and Pr.c-15 pronton high-efficiency fresh-keeping refrigerator was used for the freezing test of mashed potato. In the test, the mashed potato was arranged in a row and fork row, and on this basis, the position of mashed potato was changed (rotated 180° …
Study On Flow Channel Distribution Of Different Twin Screw Extruder Under Different Screw Contact State, Shang Jia-Wei, Zhang Li-Mei, Huang Zhi-Gang, Zhang Yi-Wei, Li He
Study On Flow Channel Distribution Of Different Twin Screw Extruder Under Different Screw Contact State, Shang Jia-Wei, Zhang Li-Mei, Huang Zhi-Gang, Zhang Yi-Wei, Li He
Food and Machinery
Objective: In order to explore the distribution law of the flow channel of polylactic acid in different screw contact states of the counter-rotating twin-screw extruder. Methods: Partially meshing screw and non-meshing screw were established by Solidworks software. Numerical sim-ulation was carried out using POLYFLOW fluid simulation software. The pressure field, shear rate field and viscosity field of polylactic acid fluid under different contact states of three screws were compared. Results: The counter-rotating twin-screw extruder in the partially meshed state has better pressure-building ability and dispersing and mixing ability for polylactic acid. Conclusion: The extrusion effect of polylactic acid in the …
Study On Air Volume Control And Performance Optimization Of Oven Based On Numerical Simulation, Li Hai-Yun, Zhang Kai, Huang Jia-Yu
Study On Air Volume Control And Performance Optimization Of Oven Based On Numerical Simulation, Li Hai-Yun, Zhang Kai, Huang Jia-Yu
Food and Machinery
A 9-point distributed thermocouple was used to measure the temperature field distribution of each layer of the oven in real time, and the oven temperature uniformity was determined and analyzed. Moreover, the internal temperature field of the oven was numerically simulated using computational fluid mechanics knowledge. The results showed that the uniformity of the temperature field inside the oven was significantly improved, by optimizing the structure of the rear baffle in the oven, adjusting the distribution of air volume, and changing the layout of the air outlet.
Design And Simulation Research And Verification Of A New Bowl-Shaped Jellyfish Spiral Cutting System, Han Chuan-Long, Lu Jin-Shi, Tao Xue-Heng, Feng Yi-Ran, Zhong Sen-Miao, Wang Jing, Guo Shuai
Design And Simulation Research And Verification Of A New Bowl-Shaped Jellyfish Spiral Cutting System, Han Chuan-Long, Lu Jin-Shi, Tao Xue-Heng, Feng Yi-Ran, Zhong Sen-Miao, Wang Jing, Guo Shuai
Food and Machinery
In order to overcome the shortcomings of manually cutting the bowl-shaped jellyfish, with inefficient and costly, high consumption of energy and serious pollution, a new bowl-shaped jellyfish spiral cutting system driven by a servo electric cylinder was designed. The corresponding three-dimensional solid model was constructed by using SolidWorks software and the dynamics simulation of the spiral cutting system was completed by HyperMesh/LS-DYNA software. Moreover, the process of cutting jellyfish with spiral cutter, the process of jellyfish skin failure and knife path formation were dynamically simulated. The change curve of shear force, and the characteristics of stress, strain and dynamic during …