Research on the Distribution of Vaporized Hydrogen Peroxide Based on UDF and Experimental verification

Abstract

Abstract In order to obtain the concentration distribution rule of vaporized hydrogen peroxide during sterilization, UDF (user-defined function) is used to describe the functional relationship of the vaporized hydrogen peroxide mass fraction at the equipment inlet, Using the software AnsysFluent, the flow field in the space is mathematically simulated to obtain the mixture flow field. The comparative analysis with the data measured from field experimental. verified the correctness of the simulation results. Studies have shown that vortices appear in the flow field near top of the room and wall surface; the concentration of vaporized hydrogen peroxide increases with the height of the space; Elevated concentration of vaporized hydrogen is found at top of the sterilization chamber, and its content is higher than the middle and bottom of the sterilization chamber. Using UDF to describe concentration of the hydrogen peroxide at the entrance of the equipment is in line with the actual working conditions and can improve the simulation accuracy.