基于Fluent法餐厨基质搅拌过程模拟及混合效果研究

Simulation and Mixing Effect Study of Kitchen Substrate Stirring Process Based on Fluent Method

研究搅拌装置中餐厨基质的高效混合问题有助于促进餐厨垃圾减量化处理及其资源化利用、提高生物质饲料质量、推动绿色技术发展。利用Fluent法采用VOF模型探究对餐厨基质搅拌过程中的流体力学分析,通过对不同搅拌参数和餐厨基质物性参数下搅拌装置内部流场的变化进行了数值模拟分析。研究表明,通过增大搅拌装置的转速使得流场的速度和湍流动能的分布稳定,降低餐厨基质的密度在500~1500 kg/m^(3),解决基料集聚和分层问题,餐厨基质的黏度在1~4 Pa·s范围内,提高搅拌的均匀度,使得餐厨基质的搅拌混合效果更好,为专用餐厨基质搅拌机设计提供一定的理论依据。

The research on the efficient mixing of Chinese food substrate in stirring unit is helpful to promote the reduction treatment and resource utilization of food waste,improve the quality of biomass feed,and promote the development of green technology.The Fluent method and VOF model are used to explore the hydrodynamic analysis of the stirring process of the kitchen substrate,and the changes of the internal flow field of the stirring device under different stirring parameters and the physical property parameters of the kitchen substrate are numerically simulated.The research shows that by increasing the rotational speed of the stirring device,the velocity of the flow field and the distribution of turbulent kinetic energy can be stabilized,the density of the kitchen substrate can be reduced to 500~1500 kg/m^(3)to solve the problem of base material agglomeration and stratification,and the viscosity of the kitchen substrate can be improved in the range of 1~4 Pa·s to improve the uniformity of mixing.It makes the mixing effect of kitchen substrate better,and provides a certain theoretical basis for the design of special kitchen substrate mixer.