关键词: 小麦, 热风干燥, 湿热传输, 模拟, 数学模型, UDF

Abstract: Drying is an important means of grain storage,so optimizing the drying process can make the drying process more scientific and energy-saving.The mathematical model of moisture and heat transfer in the process of wheat drying was established in this paper. Based on the UDF function of fluent,the corresponding self-defined program was compiled to simulate and verify the drying process of wheat in the small vertical mixed flow dryer.The results showed that the calculated results of the average humidity of wheat and the average temperature of wheat region were basically consistent with the experimental results;the humidity of wheat decreased with the increase of the drying wind speed,and the drying quality of wheat was better and the energy consumption was less when the drying wind speed was 8—10 m/s.It was proved that the model and calculation program in this paper were effective.

Key words: Wheat, Hot air drying, Heat and humidity transfer, Simulation, Mathematical model, UDF