Numerical Simulation of Internal Flow Field in Different Size Sand-Gravel Filters
Aiming at the impact of sand filters of different structures and sizes on the hydraulic performance of sand filters for micro-irrigation,this paper uses FloEFD fluid simulation software and porous media models to numerically simulate the flow fields of three filters of different sizes.The results show that the numerical simulation results of the 4-inch sand filter are compared with the actual test results.The maximum relative error is 8.94% and the average relative error is 6.47%,indicating that the po-rous media model and boundary condition settings are used Reasonable,the selected simulation has good reliability and accu-racy;the simulation results show that the internal flow field distribution of filters of different sizes is basically the same,and the optimal inlet flow range of filters of different sizes is determined according to the irrigation area,water quality,and Factors such as pump power provide a basis for selecting a reasonable filter size.
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