【摘要】 化学反应器中的化学反应过程是能量,物料平衡及物料动量,热量和物料传输等联系紧密的多物理场耦合过程.该过程涉及的物理化学问题非线性度较高,求解难度也会增加.本文对平板化学热反应器在建立其化学反应、动量传输、能量传输和物料传输的多物理场耦合数值模型的基础上进行了研究,通过COMSOL Multiphysics多物理场仿真软件的化学工程模块按照由简入繁的建模思路,逐步对所涉及的物理场进行耦合,完成对物料热反应关键控制参数温度、浓度和流速等在反应过程中变化情况的掌握,有助于产品质量控制和安全生产.更多还原

【Abstract】 There are chemical and physical phenomena in the process of chemical reactivity involving the balance of energy and mass and the transport of momentum,energy,and mass. Furthermore,the processes are associated closely and occur in the multi-field coupling system. More closely the multi-field problems associate,the higher the nonlinear level is. And it is difficult to solve the coupled problems. In this paper,the parallel plate heat reactor is studied based on building the multi-field coupling numerical model of chemistry,momentum,energy,and mass transport. With these steps the detailed modeling of a reacting system,fully coupled equations are completed from simple to complex for mass,energy,and momentum transport. It is easy to add and couple transport equations through the application modes of the chemical engineering module in COMSOL Multiphysics,setting up and solving complex models in a controlled,stepwise fashion. Through coupling of the solving multi-fields,the key control parameters are obtained including temperature,concentration,velocity in the chemical reactivity processes. It is helpful to improve the production quality control and ensure the production safety.更多还原