Overview of the Application and Innovation of COMSOL Multiphysics in Piezoelectric Inkjet Print Head Modeling

本文利用COMSOL多物理场仿真软件对压电喷墨打印头进行建模分析，旨在优化其喷射特性和稳定性。通过分离式几何建模和自适应网格细化技术，提升了模型的精细度。在物理场处理中，采用动网格组件处理流固耦合问题，并通过全参数化函数实现对压电驱动器的精确控制。针对模型的高病态性，选用并优化了全耦合直接求解器，以提高求解效率。通过参数化扫描和自动化优化，找到了消除残余震荡的最优驱动信号，显著提升了系统效率。此外，建立了独立的两相流模型，优化了墨滴成型与喷射的仿真精度。本研究不仅提高了仿真精度，还为实际工程应用提供了理论指导和技术支持。This article uses COMSOL Multiphysics simulation software to model and analyze piezoelectric inkjet print heads, aiming to optimize their ejection characteristics and stability. The refinement of the model has been improved through separate geometric modeling and adaptive mesh refinement techniques. In physical field processing, dynamic grid components are used to handle fluid-solid coupling problems and precise control of piezoelectric actuators is achieved through fully parameterized functions. In response to the high pathological nature of the model, a fully coupled direct solver was selected and optimized to improve the solving efficiency. Through parameterized scanning and automated optimization, the optimal driving signal to eliminate residual oscillations was found, significantly improving system efficiency. In addition, an independent two-phase flow model was established to optimize the simulation accuracy of ink droplet formation and ejection. This study not only improves simulation accuracy, but also provides theoretical guidance and technical support for practical engineering applications.