Modeling and Simulation of Lithium Vacuum Evaporation Process Using COMSOL Multiphysics

作     者：LIAN Xuexin ZHONG Dawen LIAN Xuexin;ZHONG Dawen

作者机构：Beijing Key Laboratory of Passive Nuclear Power Safety and TechnologyNorth China Electric Power UniversityBeijing 102206China 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2024年第33卷第1期

页      面：86-100页

核心收录：

学科分类：08[工学] 082701[工学-核能科学与工程] 0827[工学-核科学与技术] 

基　　金：financial support extended by the Beijing Natural Science Foundation (No.3192035) National Natural Science Foundation of China (No.51706068, NO.52376054) the Fundamental Research Funds for the Central Universities (No.2020MS034) is gratefully acknowledgement 

主　　题：free molecular flow saturated vapor pressure vacuum evaporation liquid lithium metal 

摘      要：Based on the COMSOL Multiphysics simulation software,this study carried out modeling and numerical simulation for the evaporation process of liquid metal lithium in the vacuum free molecular flow *** motion of lithium atoms in the evaporation process was analyzed through a succession of *** on the available experimental values of the saturated vapor pressure of liquid metal lithium,the relationship between saturated vapor pressure and temperature of liquid lithium in the range of 600 K-900 K was obtained.A two-dimensional symmetric model(3.5 mm×20 mm) was established to simulate the transient evaporation process of liquid lithium at wall temperatures of 750 K,780 K,800 K,810 K,825 K,and 850 K,*** effects of temperature,the evaporation coefficient,back pressure,and length-to-diameter ratio on the evaporation process were studied;the variation trends and reasons of the molecular flux and the pressure during the evaporation process were *** the same time,the evaporation process under variable wall temperature conditions was *** research made the evaporation process of liquid lithium in vacuum molecular flow clearer,and provided theoretical support for the space reactor and nuclear fusion related fields.