COMSOL Multiphysics provides a convenient and easy-to-use multi-physical field coupling simulation platform, which is a graphical operation interface supporting multiple languages, including simplified Chinese. The software provides a large number of physical field interfaces for electrical, mechanical, fluid flow and chemical applications, and can seamlessly couple any number of modules to cope with challenging multi-physical field applications. You can't help asking, how can I get started quickly with such a powerful and friendly tool? How to solve your own problems with COMSOL? This paper introduces some learning methods and resources, hoping to help you learn to use COMSOL multi-physical field simulation software step by step.

Preparation stage: lay a good foundation

In order to do a good job of simulation, necessary theoretical knowledge is essential. In the face of a subject or project, you must understand the physical fields involved, as well as the mathematical equations, related constraints (or boundary conditions) and material properties that describe these physical fields. Can you predict the general trend according to the theory, and can you guess which factors will affect the convergence of the model? Based on the above analysis, we can use the software correctly and choose appropriate modeling steps, including physical field interface, material properties, boundary conditions, grid, solution, post-processing analysis and so on.

How to learn COMSOL Multiphysics by convection heat transfer in light bulb?

For example, how to simulate the heating phenomenon of incandescent bulbs we use every day? Let's analyze the physical fields involved, including: current flows through the filament, generating resistance heat and emitting light, which can be described by current equation; The inert gas in the bulb is heated to produce convection, which can be described by Naville-Stokes equation. The filament radiates light and heat outward, which is a heat transfer phenomenon; The air outside the bulb is convection by conduction and radiation heat, which is fluid-heat coupling; Wait a minute. After understanding these coupled physical fields, we can make targeted modeling. For example, when we are concerned about the temperature distribution in the bulb, we can realize fluid-heat coupling simulation and coupled radiation heat transfer through heat transfer and laminar flow equations. The bulb in the case model bulb is a typical simulation model.

Quick Start: Join the Seminar

The best way to learn how to use software well is practice. Therefore, the best way to get started is to participate in official activities, such as workshops, training and annual meetings. For beginners, the free workshop provided by COMSOL is the best introductory course. In each workshop, professional engineers will explain the basic knowledge and modeling process of the software, and demonstrate the basic operation methods through field examples. COMSOL will also provide participants with free full-module software trials, and participants will enjoy the technical support services provided by COMSOL.