Experimental Study And Numerical Simulation Of Food Particles Characteristics

In pneumatic conveying of food particles, the suspension velocity are abtained by studying the flow field distribution of food particles. The suspension velocity has the important meaning to reduce the power consumption of pneumatic conveying of food particles and enhance the continuity and stability of transmission.Based on the turbulence theory of the fluid mechanics and particle dynamics theory, the two-dimensional Gas-solid two-phase flow model of turbulence are established using the computational fluid dynamics software Fluent and considering the interaction between the gas and solid, the particles and particle,and the particles and the transportation pipe wall.The flow field of the gas-particle in the vertical tube is numerically simulated,and obtain particle density and flow distribution rule of flow field. It indicates that the stream velocity of the analog computation result and the test result tally compared with the test result of the air current flow field. In this model's foundation, numerical simulation study for the parameters affecting the flow field (transport gas velocity, particle size, diameter) is carried on.The results showed that the transport gas velocity is the larger, the particle motion are more intense, and the particles movement form is the inner loop flow movement structure which the center is upward and the near pipe wall is downward; when achieve stable transmission, the particle size is the smaller, suspended speed is the greater; the diameter is the greater ,the suspension speed is the greater.It provides a reference for the design and optimization of the pneumatic conveying of food machinery。...