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所在平台: Udemy |
课程主页: https://www.udemy.com/course/mastering-comsol-multiphysics-software/
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Coursera课程“掌握COMSOL MULTIPHYSICS软件”是一门专注于COMSOL Multiphysics软件的综合性课程。该软件是一款跨平台有限元分析、求解器和多物理场仿真工具，能够处理基于物理的通用用户界面以及耦合的偏微分方程（PDE）系统。 课程涵盖了COMSOL提供的统一集成开发环境（IDE）和工作流程，适用于电气、机械、流体、声学和化学等应用领域。此外，课程还将介绍COMSOL提供的各种专业模块，包括电气、机械、流体、声学、化学、多功能以及接口模块。 课程重点关注流固耦合（FSI）这一多物理场耦合现象，该现象结合了描述流体动力学和结构力学的定律。FSI的特点是结构与周围或内部流体之间的相互作用，这种相互作用可能稳定也可能呈现振荡。 当流体与结构相互作用时，会对固体施加应力和应变（力），从而导致变形。结构变形的大小取决于流体的压力和速度以及结构的材料属性。 课程区分了两种情况： 1. **小变形且时间变化缓慢**：在这种情况下，结构变形对流体行为影响不大，主要关注固体部分的应力。 2. **时间变化快速（每秒几周期以上）**：即使是微小的结构变形也会在流体中产生压力波。这些压力波会导致振动结构发出声音，这类问题在课程中会被归类为声-结构耦合（acoustic-structure interaction），而非单纯的流-固耦合。 总而言之，该课程旨在帮助学员掌握COMSOL Multiphysics软件在处理各类工程问题，尤其是理解和模拟复杂的流固耦合现象方面的强大能力。
COMSOL Multiphysics is a cross-platform finite element analysis, solver and multiphysics simulation software. It allows conventional physics-based user interfaces and coupled systems of partial differential equations (PDEs). COMSOL provides an IDE and unified workflow for electrical, mechanical, fluid, acoustics, and chemical applications.Several modules are available for COMSOL categorized according to the applications areas Electrical, Mechanical, Fluid, Acoustic, Chemical, Multipurpose, and Interfacing. Fluid-structure interaction (FSI) is a multiphysics coupling between the laws that describe fluid dynamics and structural mechanics. This phenomenon is characterized by interactions - which can be stable or oscillatory - between a deformable or moving structure and a surrounding or internal fluid flow.When a fluid flow encounters a structure, stresses and strains are exerted on the solid object - forces that can lead to deformations. These deformations can be quite large or very small, depending on the pressure and velocity of the flow and the material properties of the actual structure.If the deformations of the structure are quite small and the variations in time are also relatively slow, the fluid's behavior will not be greatly affected by the deformation, and we can concern ourselves with only the resultant stresses in the solid parts. However, if the variations in time are fast, greater than a few cycles per second, then even small structural deformations will lead to pressure waves in the fluid. These pressure waves lead to the radiation of sound from vibrating structures. Such problems can be treated as an acoustic-structure interaction, rather than a fluid-structure interaction.
