摘要
通过介电混合方程对黑胡椒颗粒的介电特性进行推算,对比模拟值与实验值以验证介电特性混合方程的适用性。以黑胡椒颗粒为研究对象,测定压缩黑胡椒粉的介电特性,并运用介电特性混合方程-CRIME方程、LLLE方程、BE方程计算获得胡椒颗粒的介电特性,随后运用COMSOL Multiphysics软件建立静电场-热传导双向耦合模型对射频加热仿真,并通过27.12MHz,12 k W的平行极板式射频系统进行加热实验验证。采用CRIME方程获得的胡椒颗粒介电特性运用在仿真中与试验结果温度分布为最接近。作者证明了通过压缩胡椒粉末介电特性代入CRIME方程能够有效获得黑胡椒颗粒的介电特性,这有助于工业生产中颗粒物料射频加热工艺的研发。
The aim of the research is to find the optimum mixing equation for dielectric properties and verify its prediction accuracy in a radio frequency heating process.By measuring the dielectric constant of ground black pepper powder,the corresponding dielectric properties of particles were calculated using CRIME,LLLE and BE equation,respectively.The obtained dielectric properties were applied in COMSOL Multiphysics simulation for a radio frequency heating process and then verified by a parallel-plate radio frequency system(27.12 MHz,12 kW).Results showed that the dielectric properties obtained by the CRIME equation provided the most reasonable temperature distribution as compared to the experimental results.The research proves that CRIME equation is a suitable model for black pepper particle dielectric properties,which may have an industrial application for heating process prediction of other granular materials.
作者
王品正
李锋
张汝怡
朱亚莉
李双
焦阳
WANG Pinzheng;LI Feng;ZHANG Ruyi;ZHU Yali;LI Shuang;JIAO Yang(National R&D Branch Center for Freshwater Aquatic Products Processing Technology(Shanghai)/School of Food Science,Shanghai Ocean University,Shanghai 201306,China;Engineering Research Center of Food Thermal-Processing Technology,Shanghai 201306,China;College of Food Science and Light Industry,Nanjing Tech University,Nanjing 211816,China;Tianshun Agricultural Product Company,Xuzhou 221000,China)
出处
《食品与生物技术学报》
CAS
CSCD
北大核心
2020年第7期36-43,共8页
Journal of Food Science and Biotechnology
基金
国家自然科学基金青年基金项目(31801613)
中国博士后科学基金面上资助项目(2018M632299)。
关键词
黑胡椒
介电特性
射频加热
仿真
black pepper
dielectric properties
radio frequency heating
computer simulation
