Fluid dynamics performance of phase change material particles in a Wurster spout–fluid bed
作者机构：ADAI-LAETADepartment of Mechanical EngineeringUniversity of Coimbra3030-78& CoimbraPortugal Department of Food EngineeringSchool of Food EngineeringStare University of Campinas80 Monteiro Lobato Street13083-862CampinasBrazil
出 版 物：《Particuology》 (颗粒学报（英文版）)
年 卷 期：2019年第17卷第1期
页 面：163-175页
核心收录：
学科分类：08[工学] 0835[工学-软件工程] 081202[工学-计算机软件与理论] 0812[工学-计算机科学与技术（可授工学、理学学位）]
主 题：Computational fluid dynamics OpenFOAM Simulation Carnauba wax
摘 要：Spout–fluid-bed coating of solid–lipid materials, including some Phase Change Materials (PCMs), is a rarely used approach because of the probability of a phase change during the process. However, if mastered, this process could enable the commercialization of high-load PCM particles to develop new materials. An understanding of the thermal and fluid dynamics profiles inside a reactor can be used to establish optimized coating conditions, to avoid premature PCM melting and to maximize the drying rate. This research studies, through computational simulation, the behavior of particles and the experimental thermal profile inside a Wurster spout–fluid bed. A simplified model approach of momentum was simulated using OpenFOAM and carnauba wax particles as a PCM material. The simulation showed that appropriate flow conditions inside the Wurster tube must vary between 200 and 300 m3/h to ensure a better particle coating. The measured experimental thermal profile was uniform in the reactor and it was 5–10 °C lower than the set temperature. Thus, a maximum airflow at 70 °C that was used in the equipment is considered suitable for the further coating of PCM particles. The methodology proved useful for the preliminary identification of flow and temperature conditions in the spout–fluid process.
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